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Kepler Data Release 16 Notes

Q5–Q8

KSCI-19056-001Data Analysis Working Group (DAWG)

Jessie Christiansen (Editor)Tom Barclay (Editor)

May 22, 2012


KSCI-19056-001: Kepler Data Release 16 Notes

Document Control

OwnershipThis document is part of the Kepler Project Documentation that is controlled by the Kepler Project Office,NASA/Ames Research Center, Moffett Field, California.

Control LevelThis document will be controlled under KPO @ Ames Configuration Management system. Changes to thisdocument shall be controlled.

Physical LocationThe physical location of this document will be in the KPO @ Ames Data Center.

Distribution RequestsTo be place on the distribution list for additional revisions of this document, please address your request tothe Kepler Science Office:

Michael R. HaasKepler Science Office DirectorMS 244-30NASA Ames Research CenterMoffett Field, CA [email protected]

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The Data Characteristics Handbook and accompanying Data Release Notes are the collective effort ofthe Data Analysis Working Group (DAWG), composed of Science Office (SO), Science Operations Center(SOC), and Guest Observer (GO) Office members as listed below:

Jon Jenkins*, ChairDoug Caldwell*, Co-ChairBarclay, ThomasBryson, Stephen T.Burke, Christopher J.Christiansen, Jessie L.Clarke, Bruce D.Cote, Miles T.Girouard, ForrestHaas, Michael R.Hall, JenniferIbrahim, KhadeejahKinemuchi, KarenKlaus, ToddKolodziejczak, Jeffery (MSFC)Li, JieMcCauliff, Sean D.Morris, RobMullally, FergalQuintana, Elisa V.Rowe, JasonSeader, ShawnSmith, Jeffrey ClaiborneStill, MartinStumpe, Martin C.Tenenbaum, Peter G.Thompson, Susan E.Twicken, JoeUddin, Akm KamalVan Cleve, Jeffrey

The correct citation for this document is: J. L. Christiansen, T. Barclay, J. M. Jenkins, D. A. Caldwell,S. T. Bryson, C. J. Burke, B. D. Clarke, M. T. Cote, F. Girouard, M. R. Haas, J. R. Hall, K. Ibrahim, K.Kinemuchi, T. C. Klaus, J. J. Kolodziejczak, J. Li, S. D. McCauliff, R. Morris, F. Mullally, E. V. Quintana, J.Rowe, S. Seader, J. C. Smith, M. D. Still, M. C. Stumpe, P. G. Tenenbaum, S. E. Thompson, J. D. Twicken,A. K. Uddin, and J. E. Van Cleve, 2012, Kepler Data Release 16 Notes (KSCI-19056-001).

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Contents

1 Introduction 81.1 Dates, Cadence Numbers, and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Release Description 10

3 Evaluation of Performance 113.1 Overall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 Historical Events 134.1 Kepler Mission Timeline to Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.2 Safe Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.3 Loss of Fine Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.4 Attitude Tweaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144.5 Variable FGS Guide Stars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144.6 Module 3 Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5 Ongoing Phenomena 175.1 Image Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.2 Focus Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.3 Momentum Desaturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.4 Reaction Wheel Zero Crossings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.5 Downlink Earth Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.6 Manually Excluded Cadences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.7 Incomplete Apertures Give Flux and Feature Discontinuities at Quarter Boundaries . . . . . 185.8 Argabrightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.9 Background Time Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.10 Pixel Sensitivity Droputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.11 Short Cadence Requantization Gaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.12 Spurious Frequencies in SC Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.13 Propagation of Uncertainties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.14 Onboard Spacecraft Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235.15 Anomaly Summary Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6 Time and Time Stamps 30

7 Ensemble Cotrending Basis Vectors 317.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.2 Generation of CBVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.3 Using CBVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.4 Quality of CBVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.5 Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317.6 Obtaining CBVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8 Contents of Supplement 328.1 Q5 Supplement Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.1.1 Full Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328.1.2 Small Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.2 Q6 Supplement Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338.2.1 Full Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338.2.2 Small Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.3 Q7 Supplement Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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8.3.1 Full Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348.3.2 Small Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

8.4 Q8 Supplement Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368.4.1 Full Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368.4.2 Small Supplement Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

9 References 38

A SOC 8.0 and 8.1 Improvements 39A.1 SOC 8.0 – Improvements to PDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39A.2 SOC 8.0 – New FITS header keywords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39A.3 SOC 8.0 – Improved World Coordinates in Full Frames Images . . . . . . . . . . . . . . . . . 39A.4 SOC 8.1 – Additional Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

B Problems with Q8, month 2 short-cadence data 40

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A Word of Caution to Users

The Simple Aperture Photometry (SAP) product generated by the PA (Photometric Analysis) pipelinemodule and the PDC (Pre-search Data Conditioning) processed data are designed for automated photome-try on over 160,000 stars. Although significant effort has been expended to make these products robust andreliable, they do not produce the best photometry for every target. To mitigate the impact of non-optimalapertures, Kepler is now providing target pixel files so that users can perform their own photometry. Keplerhas also completely reworked the PDC software module, which is now producing significantly improved resultsfor most long-cadence targets. To take advantage of these improvements, Q0–Q8 have been reprocessed; thereprocesed Q5–Q8 are the subject of these Notes. First-time processing has used this new PDC module sinceQ9 (Data Release 12). Also, cotrending basis vectors (see Section 7.0) are being provided for all quarters sothat users can better remove systematics from the simple-aperture-photometry (SAP) light curves generatedby the pipeline or custom light curves self-extracted from the target pixel files.

Investigators are strongly encouraged to study the Data Characteristics Handbook and Data Release Notesfor all data sets that they intend to use. We advise against publication of results based on Kepler lightcurves without careful consideration and due diligence by the end user, and dialogue with the Science Officeor Guest Observer Office where appropriate.

Users are encouraged to notice and document artifacts or issues with the processing and report them tothe Science Office at [email protected].

Like Waldseemuller’s 1507 map, the Maximum A Priori (MAP) method for PDC and other improvementsto light curve correction implemented in Kepler Pipeline 8.0 will show us more of the light-curve world thanwe knew before, while leaving some hazards to navigation around the edges. Far-ranging light curve marinerswill be given the tools to help navigate in such perilous circumstances by the Guest Observer Office.

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1 Introduction

This set of Data Release Notes is the second in a set of multi-quarter releases, the first being the Data Release14 Notes covering Quarters 0–4. These releases are a result of the large re-processing effort on the part of theKepler Science Operations Center (SOC) and the Kepler Science Office. Quarters 5–8 are re-released here,processed with the latest version of the software, SOC Pipeline 8.1. This software includes many significantimprovements over the previous versions; the major improvements are summarized in Appendix A.

These Notes contain the summary figures and tables for these quarters—the companion text can be foundin the Kepler Data Characteristics Handbook (KSCI-19040). The sections are numbered in the same orderin these Notes and the Handbook to assist the reader, with the exception of the addition of Section 5.14 todescribe a new anomaly category.

1.1 Dates, Cadence Numbers, and Units

No changes from the Data Characteristics Handbook.

Contents of Data Release 16–Cadence Data.

Q.m Class First Cadence Last Cadence First Cadence Last Cadence Num Start EndMJD midTime MJD midTime UT midTime UT midTime CINs CIN CIN

5 LC 55275.9912 55370.6600 20-Mar-2010 23:47:15 23-Jun-2010 15:50:26 4634 16373 210065.1 SCM1 55275.9813 55307.5096 20-Mar-2010 23:33:02 21-Apr-2010 12:13:53 46290 479650 5259395.2 SCM2 55308.7772 55336.4028 22-Apr-2010 18:39:10 20-May-2010 09:39:57 40560 527800 5683595.3 SCM3 55337.0982 55370.6699 21-May-2010 02:21:22 23-Jun-2010 16:04:39 49290 569380 6186696 LC 55371.9473 55461.7939 24-Jun-2010 22:44:09 22-Sep-2010 19:03:09 4398 21069 254666.1 SCM1 55371.9375 55399.0317 24-Jun-2010 22:29:55 22-Jul-2010 00:45:41 39780 620530 6603096.2 SCM2 55399.8702 55430.7855 22-Jul-2010 20:53:04 22-Aug-2010 18:51:11 45390 661540 7069296.3 SCM3 55431.6853 55461.8037 23-Aug-2010 16:26:48 22-Sep-2010 19:17:22 44220 708250 7524697 LC 55462.6725 55552.0491 23-Sep-2010 16:08:24 22-Dec-2010 01:10:41 4375 25509 298837.1 SCM1 55462.6626 55492.7811 23-Sep-2010 15:54:11 23-Oct-2010 18:44:45 44220 753730 7979497.2 SCM2 55493.5378 55522.7367 24-Oct-2010 12:54:26 22-Nov-2010 17:40:54 42870 799060 8419297.3 SCM3 55523.6161 55552.0590 23-Nov-2010 14:47:08 22-Dec-2010 01:24:54 41760 843220 8849798 LC 55567.8647 55634.8460 06-Jan-2011 20:45:08 14-Mar-2011 20:18:16 3279 30657 339358.1 SCM1 55567.8548 55585.5496 06-Jan-2011 20:30:55 24-Jan-2011 13:11:27 25980 908170 9341498.2 SCM2 55585.6116 55614.7084 24-Jan-2011 14:40:43 22-Feb-2011 17:00:02 42720 934240 9769598.3 SCM3 55614.7703 55634.8559 22-Feb-2011 18:29:18 14-Mar-2011 20:32:29 29490 977050 1006539

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Contents of Data Release 16–Full Frame Images.

Q Class Filename UT Start UT End

5 FFI KPLR2010111125026 21-Apr-2010 12:21:01 21-Apr-2010 12:50:265 FFI KPLR2010140101631 20-May-2010 09:47:06 20-May-2010 10:16:315 FFI KPLR2010174164113 23-Jun-2010 16:11:48 23-Jun-2010 16:11:486 FFI KPLR2010203012215 22-Jul-2010 00:52:49 22-Jul-2010 01:22:156 FFI KPLR2010234192745 22-Aug-2010 18:58:19 22-Aug-2010 19:27:456 FFI KPLR2010265195356 22-Sep-2010 19:24:31 22-Sep-2010 19:53:567 FFI KPLR2010296192119 23-Oct-2010 18:51:53 23-Oct-2010 19:21:197 FFI KPLR2010326181728 22-Nov-2010 17:48:03 22-Nov-2010 18:17:287 FFI KPLR2010356020128 22-Dec-2010 01:32:03 22-Dec-2010 02:01:288 FFI KPLR2011024134926 24-Jan-2011 13:20:01 24-Jan-2011 13:49:268 FFI KPLR2011053174401 22-Feb-2011 17:14:35 22-Feb-2011 17:44:01

The re-released Q5–Q7 Full Frame Images (FFIs) have an improved world coordinate system (WCS)solution when compared to the previous versions; the Q8 FFIs had already been released with the improvedsolution. The new FFIs use a non-linear WCS based on the simple imaging polynomial (SIP) conventionsof Shupe et al. (2005). The transformations from sky coordinates to pixel coordinates is calculated by theKepler pipeline for each long cadence but not for the FFIs. We use the nearest good long cadence to calculatethe coordinate transformations for each FFI (usually the last long cadence of the month). The WCS solutionis typically accurate to 0.1 pixels (0.4 arcseconds) when compared to the 2MASS point source catalogue(Skrutskie et al. 2006). For additional details, see the Archive Manual.

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2 Release Description

No change from the Data Characteristics Handbook.

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3 Evaluation of Performance

3.1 Overall

Figure 1: 6.5-h Temporal Median (TM) of the CDPP time series calculated by the TPS pipeline modulefor dwarf stars between Kp=11.75–12.25. The 6-h TMCDPPs have been divided by sqrt(13/12) = 1.041 toapproximate 6.5-h TMCDPPs. A detailed discussion of the median and 10th percentile of CDPP values isgiven in the Kepler Data Characteristics Handbook. The 6.x, 7.0 and 8.0 labels given in the legend refer tothe version of the SOC pipeline used; these Notes pertain to the SOC 8.1 reprocessing of Q5–Q8.

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Table 1: Aggregate statistics for the TMCDPPs by magnitude. Column Definitions: (1) Kepler Magnitudeat the center of the bin. Bins are ± 0.25 mag, for a bin of width 0.5 mag centered on this value. (2) Numberof dwarfs (log g > 4) in the bin. (3) 10th percentile TMCDPP for dwarfs in the bin. (4) Median TMCDPPfor dwarfs in the bin. (5) Number of all stars in the bin. (6) 10th percentile TMCDPP of all observed starsin the bin. (7) Median TMCDPP for all stars in the bin. (8) Simplified noise model CDPP.

Q5Kp mag No. dwarfs 10th prctile Median No. stars 10th prctile Median Noise model

9.0 52 10.2 22.1 185 10.5 46.9 3.810.0 161 12.5 30.3 591 12.9 58.3 6.011.0 634 17.0 28.8 1775 19.0 64.5 9.512.0 2229 23.6 33.7 4310 24.9 52.9 15.213.0 7009 34.8 45.4 10114 35.8 52.1 24.414.0 14261 55.1 69.2 16511 55.6 71.2 40.115.0 28701 98.2 123.9 28705 98.2 123.9 68.816.0 15019 176.1 218.9 15019 176.1 218.9 127.8


9.0 56 9.4 21.8 179 9.9 46.4 3.810.0 160 12.0 29.2 567 13.7 55.7 6.011.0 608 17.7 28.0 1707 19.0 64.0 9.512.0 2169 23.9 33.7 4385 25.3 55.6 15.213.0 6768 35.0 45.6 10645 36.4 56.1 24.414.0 13879 54.9 69.8 16721 55.7 72.9 40.115.0 27329 97.0 124.6 27333 97.0 124.6 68.816.0 14322 177.4 222.8 14322 177.4 222.8 127.8


9.0 49 9.2 20.2 179 10.1 45.8 3.810.0 161 11.8 30.0 572 12.5 56.7 6.011.0 600 17.2 28.5 1704 19.0 64.8 9.512.0 2156 23.5 33.4 4265 24.9 53.6 15.213.0 6826 34.7 45.2 10038 35.7 52.8 24.414.0 13882 54.5 68.9 16241 55.1 71.2 40.115.0 27793 97.0 123.2 27797 97.0 123.2 68.816.0 14487 176.6 219.3 14487 176.6 219.3 127.8


9.0 53 7.9 21.9 183 9.5 43.9 3.810.0 161 11.8 29.6 587 12.1 56.5 6.011.0 637 16.3 29.4 1775 18.3 63.9 9.512.0 2231 23.2 33.4 4346 24.5 52.6 15.213.0 7037 34.3 44.5 10279 35.5 52.0 24.414.0 14290 54.3 68.6 16644 55.0 70.7 40.115.0 28659 97.8 124.4 28663 97.8 124.4 68.816.0 15006 181.4 229.1 15006 181.4 229.1 127.8

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4 Historical Events

In this Section, we discuss cadences that may not be useful for high-precision photometry due to planned orunplanned spacecraft events. There is no change in this section from the Data Release Notes compiled forprevious releases of these data; it is maintained here for completeness.

4.1 Kepler Mission Timeline to Date

Figure 2: Kepler Mission Timeline as of the end of Q8.

4.2 Safe Mode

There were three Safe Modes in the period from Q5–Q8, shown in Figure 2. The Safe Modes that occurred on12/22/2010 and 3/14/2011 bracketed the Q8 quarter and resulted in a considerably shorter data collectiontime for Q8 than scheduled.

4.3 Loss of Fine Point

A list of the cadences obtained when the spacecraft was not in fine point are available in the Supplementto this document and are now indicated in the quality flag column in the files at MAST (see the KeplerArchive Manual). Additional cadences where the telescope pointing was poor (> 0.5 milli-pixels off nominalpointing), but where the telescope did not report a loss of fine point are labeled as “coarse point” in Tables5 and 6. Care should be taken when using these cadences for scientific endeavors.

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4.4 Attitude Tweaks

The pointing history is shown in Figure 3.

4.5 Variable FGS Guide Stars


4.6 Module 3 Failure


Figure 3: Attitude Error for Q5–Q8, calculated by PAD using Long Cadence data. Note that differentquarters have different vertical and horizontal scales (continued on subsequent pages.)

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Figure 3: – continued from previous page.

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5 Ongoing Phenomena

In this Section, we document the systematic errors arising in nominal on-orbit operations, most of which willbe removed from the “corrected” flux time series by the scientific pipeline.

5.1 Image Motion


5.2 Focus Changes


5.3 Momentum Desaturation

Tables of the Long and Short Cadences affected by momentum desaturations in the reaction wheels areprovided in the Data Release Notes Supplement; the affected cadences are also indicated by the quality flagcolumn in the FITS files at MAST.

5.4 Reaction Wheel Zero Crossings

The cadences occurring during reaction wheel zero crossings are listed in Table 2. These cadences are alsoindicated by the quality flag column in the FITS files at MAST.

Table 2: Zero crossing events in Q5–Q8, defined as the time from first to last zero crossing in the event,rounded to the nearest cadence. The corresponding Short Cadence numbers can be found in the DataRelease 16 Supplement. CIN = cadence interval number, RCI = relative cadence index.

Event no. MJD start MJD end CIN start CIN end RCI start RCI end

Q5

1 55275.991 55276.400 16373 16393 1 212 55278.157 55278.607 16479 16501 107 1293 55286.637 55286.923 16894 16908 522 5364 55295.342 55295.485 17320 17327 948 9555 55301.492 55301.615 17621 17627 1249 12556 55304.455 55304.619 17766 17774 1394 14027 55370.129 55370.660 20980 21006 4608 4634

Q6

1 55379.569 55379.957 21442 21461 374 3932 55382.552 55382.695 21588 21595 520 5273 55388.499 55388.601 21879 21884 811 8164 55397.469 55397.510 22318 22320 1250 12525 55410.894 55410.935 22975 22977 1907 1909

Q7

1 55465.084 55465.186 25627 25632 119 1242 55465.227 55467.086 25634 25725 126 2173 55467.209 55467.720 25731 25756 223 2484 55476.670 55476.956 26194 26208 686 7005 55479.653 55479.673 26340 26341 832 8336 55488.603 55488.623 26778 26779 1270 12717 55491.586 55491.668 26924 26928 1416 1420

Continued on next page

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Table 2 – continued from previous page

Event no. MJD start MJD end CIN start CIN end RCI start RCI end

8 55495.714 55495.836 27126 27132 1618 16249 55498.697 55498.758 27272 27275 1764 1767

10 55501.660 55501.721 27417 27420 1909 191211 55507.647 55507.688 27710 27712 2202 2204

Q8

1 55569.602 55569.990 30742 30761 86 1052 55572.850 55573.075 30901 30912 245 2563 55578.735 55578.797 31189 31192 533 5364 55584.722 55584.845 31482 31488 826 832

5.5 Downlink Earth Point

The cadences occurring during spacecraft Earth Point are listed in Tables 5 and 6.

5.6 Manually Excluded Cadences


5.7 Incomplete Apertures Give Flux and Feature Discontinuities at QuarterBoundaries


5.8 Argabrightening

The cadences affected by Argabrightening events, as described in the Data Characteristics Handbook, arelisted in Tables 3 and 4 for LC and SC respectively.

Table 3: Q5–Q8 LC Argabrightening Events with amplitude TMAD > 10, and occurring on a number ofchannels TMCE > 10. The columns are (1) Cadence interval number (CIN) for Argabrightening cadences, (2)Relative cadence index (RCI) for Argabrightening cadences, (3) Argabrightening cadence mid-times (MJD),(4) Mean Argabrightening statistic over channels included in the Argabrightening event < SArg >FPA, (5)Number of channels exceeding threshold for this cadence (Nchan), (6) Number of channels exceeding thedefault pipeline threshold for this cadence (Npipe).

CIN RCI Mid-Times (MJD) < SArg >FPA Nchan Npipe

Q5

16386 14 55276.25679 23.3 78 016430 58 55277.15587 278.3 80 7916454 82 55277.64628 20.9 78 017024 652 55289.29343 46.2 71 117399 1027 55296.95603 7.1 16 017669 1297 55302.47310 18.7 21 518148 1776 55312.26079 7.7 15 018397 2025 55317.34876 57.6 79 018436 2064 55318.14567 8.6 30 0


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18440 2068 55318.22740 13.1 66 018456 2084 55318.55434 13.5 50 018505 2133 55319.55559 227.4 80 7918568 2196 55320.84291 7.1 14 018605 2233 55321.59895 93.8 68 3518759 2387 55324.74572 9.2 28 018778 2406 55325.13396 6.9 20 018819 2447 55325.97174 142.1 80 6218917 2545 55327.97423 9.6 39 019031 2659 55330.30366 38.1 73 019080 2708 55331.30491 16.6 78 019202 2830 55333.79781 21.1 69 019324 2952 55336.29071 441.4 80 7919374 3002 55337.31239 7.4 28 019491 3119 55339.70312 35.1 79 019876 3504 55347.57006 6.7 22 019928 3556 55348.63261 14.6 62 020159 3787 55353.35277 4.8 20 020201 3829 55354.21098 14.4 66 020568 4196 55361.71011 51.4 79 020881 4509 55368.10583 7.1 16 0

Q6

21601 533 55382.81801 16.5 78 021836 768 55387.61990 7.4 11 022014 946 55391.25708 8.5 18 022169 1101 55394.42429 7.5 17 022296 1228 55397.01936 7.9 13 023130 2062 55414.06099 8.5 21 023465 2397 55420.90624 64.9 70 1523466 2398 55420.92668 15.5 22 223616 2548 55423.99172 104.1 80 4623945 2877 55430.71437 7.4 17 023946 2878 55430.73481 11.0 29 023948 2880 55430.77567 19.6 62 024061 2993 55433.08465 14.9 62 024386 3318 55439.72557 8.2 13 024427 3359 55440.56335 38.0 80 024470 3402 55441.44199 68.9 80 724640 3572 55444.91570 5.9 20 024796 3728 55448.10335 3.2 16 024994 3926 55452.14920 7.3 11 025111 4043 55454.53993 9.3 30 025334 4266 55459.09662 18.1 74 0

Q7

25925 417 55471.17288 7.3 12 026051 543 55473.74752 9.9 38 026350 842 55479.85717 11.7 59 026698 1190 55486.96806 52.2 79 0


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26724 1216 55487.49933 189.2 80 7926789 1281 55488.82752 5.4 21 026976 1468 55492.64860 7.5 16 027466 1958 55502.66107 9.1 29 027636 2128 55506.13478 29.8 78 027777 2269 55509.01592 8.0 13 027807 2299 55509.62893 7.9 25 028885 3377 55531.65635 15.0 72 029427 3919 55542.73137 133.0 80 7529877 4369 55551.92649 29.1 78 0

Q8

30908 252 55572.99352 113.2 80 6130935 279 55573.54522 22.3 77 031383 727 55582.69948 72.2 80 231384 728 55582.71991 9.3 35 031898 1242 55593.22279 351.7 80 7832480 1824 55605.11513 13.2 59 032503 1847 55605.58510 7.8 21 032516 1860 55605.85074 24.6 78 032729 2073 55610.20310 3.7 12 032730 2074 55610.22353 5.1 18 032731 2075 55610.24396 6.4 26 032732 2076 55610.26440 7.4 27 032733 2077 55610.28483 8.1 30 032734 2078 55610.30526 8.7 36 032735 2079 55610.32570 8.2 31 032736 2080 55610.34613 6.0 25 032738 2082 55610.38700 5.3 16 032739 2083 55610.40743 5.3 18 032740 2084 55610.42787 5.4 19 032741 2085 55610.44830 4.7 17 032742 2086 55610.46873 3.3 14 032743 2087 55610.48917 4.6 17 032810 2154 55611.85822 23.3 76 032885 2229 55613.39074 365.1 80 7833029 2373 55616.33318 38.4 79 033199 2543 55619.80689 131.4 80 7333286 2630 55621.58461 69.0 79 033311 2655 55622.09545 7.6 23 033403 2747 55623.97535 39.0 79 033539 2883 55626.75432 7.5 17 033656 3000 55629.14505 16.6 40 033770 3114 55631.47448 8.1 27 033876 3220 55633.64044 30.6 78 0

20


Table 4: Q5–Q8 SC Argabrightening Events with amplitude TMAD > 10, and occurring on a number ofchannels TMCE > 10. The columns have the same meanings as Table 3. Note consecutive detections of thelargest events. A horizontal line separates the three months of the quarter; the relative cadence index (RCI)is reset at the start of each month.


Q5

480052 403 55276.25509 20.2 74 0481386 1737 55277.16370 226.6 80 80481387 1738 55277.16438 19.1 75 0482101 2452 55277.65070 14.2 59 0499196 19547 55289.29445 6.6 23 0499197 19548 55289.29513 30.9 68 9510436 30787 55296.95024 3.9 11 0518541 38892 55302.47072 12.0 17 6540395 12596 55317.35591 11.2 50 0540396 12597 55317.35659 15.3 49 0540398 12599 55317.35795 21.6 57 0542152 14353 55318.55264 7.3 19 0543615 15816 55319.54912 113.6 80 78543616 15817 55319.54980 95.1 78 63545504 17705 55320.83575 6.5 15 0546638 18839 55321.60814 84.7 63 48551234 23435 55324.73857 7.9 20 0551981 24182 55325.24737 33.8 79 3553044 25245 55325.97140 45.9 79 22553045 25246 55325.97208 23.8 78 0553046 25247 55325.97276 15.2 62 0553047 25248 55325.97344 22.7 71 0553048 25249 55325.97412 13.7 51 0555994 28195 55327.98070 8.4 23 0559400 31601 55330.30060 34.9 74 8560861 33062 55331.29571 15.3 62 0564523 36724 55333.78998 8.4 32 0564524 36725 55333.79066 8.4 26 0568183 40384 55336.28288 374.6 80 80568184 40385 55336.28356 20.3 47 7568185 40386 55336.28424 6.1 11 2569701 322 55337.31682 4.8 17 0573192 3813 55339.69461 30.6 80 0586320 16941 55348.63635 13.3 56 0594508 25129 55354.21336 7.6 21 0605521 36142 55361.71454 32.8 80 4605522 36143 55361.71522 8.2 22 0612091 42712 55366.18950 27.6 78 1

Q6

636501 15972 55382.81562 15.9 64 0640187 19658 55385.32623 7.4 16 0648880 28351 55391.24721 7.8 17 0665777 4238 55402.75609 6.4 13 0


21




692439 30900 55420.91612 64.2 66 35692440 30901 55420.91680 14.3 22 2696948 35409 55423.98729 39.4 74 10696949 35410 55423.98797 59.2 67 32710291 2042 55433.07545 7.4 15 0720044 11795 55439.71842 5.1 12 1721281 13032 55440.56096 30.5 77 3722571 14322 55441.43961 11.4 38 0722572 14323 55441.44029 14.0 48 0722573 14324 55441.44097 26.1 69 4727678 19429 55444.91809 5.5 18 0748502 40253 55459.10173 8.0 24 0

Q7

766232 12503 55471.17799 6.6 11 0770015 16286 55473.75467 9.3 30 0778976 25247 55479.85819 8.9 28 0789405 35676 55486.96159 47.5 80 17790205 36476 55487.50649 69.5 80 45790206 36477 55487.50717 101.0 80 66790207 36478 55487.50785 8.9 32 0792146 38417 55488.82854 3.3 13 0817552 18493 55506.13308 26.7 79 1871277 28058 55542.72626 92.6 80 75871278 28059 55542.72694 32.4 80 4884793 41574 55551.93228 27.6 80 0

Q8

915724 7555 55572.99999 106.0 78 73915725 7556 55573.00067 23.2 62 1916518 8349 55573.54080 24.9 76 0929979 21810 55582.70936 81.8 78 57929980 21811 55582.71004 8.7 23 0945403 11164 55593.21495 317.7 78 78962873 28634 55605.11411 12.9 51 0963551 29312 55605.57591 6.8 19 0963944 29705 55605.84359 14.7 60 0963945 29706 55605.84427 8.5 30 0972787 38548 55611.86673 6.7 16 0972788 38549 55611.86741 15.1 51 0975030 40791 55613.39448 291.8 78 78975031 40792 55613.39517 33.5 73 4979356 2307 55616.34101 22.6 77 0979357 2308 55616.34169 14.5 56 0984430 7381 55619.79701 130.1 78 78987042 9993 55621.57610 49.1 78 19987043 9994 55621.57678 21.1 70 0990560 13511 55623.97228 37.3 78 6994650 17601 55626.75806 7.9 19 0998142 21093 55629.13653 9.9 29 0


22




1001577 24528 55631.47618 8.8 31 01004761 27712 55633.64487 31.0 78 1

5.9 Background Time Series

The background flux time series for Q5–Q8 are shown in Figure 4.

5.10 Pixel Sensitivity Droputs


5.11 Short Cadence Requantization Gaps


5.12 Spurious Frequencies in SC Data


5.13 Propagation of Uncertainties


5.14 Onboard Spacecraft Errors


5.15 Anomaly Summary Tables

The complete list of affected cadence interval numbers (CINs) for Tables 5 and 6 below are included in theData Release 16 Supplement.

Table 5: Q5–Q8 LC Anomaly Summary Table

LC CIN start LC CIN end Anomaly Type Note

Q5

16373 16373 EARTH POINT16430 16430 ARGABRIGHTENING17916 17977 EARTH POINT18505 18505 ARGABRIGHTENING18605 18605 ARGABRIGHTENING18819 18819 ARGABRIGHTENING19324 19324 ARGABRIGHTENING19330 19363 EARTH POINT


23



LC CIN start LC CIN end Anomaly Type Note

Q6

21069 21069 EARTH POINT22395 22436 EARTH POINT23465 23466 ARGABRIGHTENING23616 23616 ARGABRIGHTENING23949 23992 EARTH POINT24470 24470 ARGABRIGHTENING

Q7

25509 25509 EARTH POINT26724 26724 ARGABRIGHTENING26983 27019 EARTH POINT28449 28491 EARTH POINT29427 29427 ARGABRIGHTENING29461 29485 COARSE POINT29618 29620 COARSE POINT

Q8

30657 30657 EARTH POINT30908 30908 ARGABRIGHTENING31383 31383 ARGABRIGHTENING31898 31898 ARGABRIGHTENING31915 32046 SAFE MODE32885 32885 ARGABRIGHTENING33199 33199 ARGABRIGHTENING33286 33286 ARGABRIGHTENING

Table 6: Q5–Q8 SC Anomaly Summary Table

SC CIN start SC CIN end Anomaly Type Note

Q5

481386 481386 ARGABRIGHTENING481790 481801 COARSE POINT486200 486211 COARSE POINT490550 490561 COARSE POINT494930 494941 COARSE POINT499340 499351 COARSE POINT503690 503701 COARSE POINT508070 508081 COARSE POINT512480 512491 COARSE POINT516830 516841 COARSE POINT521210 521221 COARSE POINT525620 525631 COARSE POINT530090 530101 COARSE POINT534470 534481 COARSE POINT538850 538861 COARSE POINT543230 543241 COARSE POINT543615 543616 ARGABRIGHTENING


24




546638 546638 ARGABRIGHTENING547610 547621 COARSE POINT551990 552001 COARSE POINT553044 553044 ARGABRIGHTENING556370 556381 COARSE POINT560750 560761 COARSE POINT565130 565141 COARSE POINT568183 568185 ARGABRIGHTENING568310 568321 COARSE POINT572660 572671 COARSE POINT577040 577051 COARSE POINT581420 581431 COARSE POINT585800 585811 COARSE POINT590180 590191 COARSE POINT594560 594571 COARSE POINT598940 598951 COARSE POINT603320 603331 COARSE POINT607700 607711 COARSE POINT612079 612091 COARSE POINT616460 616471 COARSE POINT618620 618631 COARSE POINT

Q6

622969 622980 COARSE POINT627349 627360 COARSE POINT631729 631740 COARSE POINT636109 636120 COARSE POINT640489 640500 COARSE POINT644869 644880 COARSE POINT649249 649260 COARSE POINT653629 653640 COARSE POINT658009 658020 COARSE POINT660259 660270 COARSE POINT664609 664620 COARSE POINT668989 669000 COARSE POINT673369 673380 COARSE POINT677749 677760 COARSE POINT682129 682140 COARSE POINT686509 686520 COARSE POINT690889 690900 COARSE POINT692439 692440 ARGABRIGHTENING695269 695280 COARSE POINT696948 696949 ARGABRIGHTENING699649 699660 ARGABRIGHTENING704029 704040 COARSE POINT706879 706890 COARSE POINT711259 711270 COARSE POINT715639 715650 COARSE POINT720019 720030 COARSE POINT724399 724410 COARSE POINT


25




728779 728790 COARSE POINT733129 733140 COARSE POINT737509 737520 COARSE POINT741889 741900 COARSE POINT746269 746280 COARSE POINT750649 750660 COARSE POINT750970 751029 COARSE POINT752419 752430 COARSE POINT

Q7

756768 756781 COARSE POINT761148 761161 COARSE POINT765528 765541 COARSE POINT769908 769921 COARSE POINT774288 774301 COARSE POINT778668 778681 COARSE POINT783048 783061 COARSE POINT787428 787441 COARSE POINT789405 789405 ARGABRIGHTENING790180 790209 ARGABRIGHTENING791808 791821 COARSE POINT796188 796201 COARSE POINT797898 797911 COARSE POINT802248 802261 COARSE POINT806628 806641 COARSE POINT811008 811021 COARSE POINT815388 815401 COARSE POINT819768 819781 COARSE POINT824148 824161 COARSE POINT828528 828541 COARSE POINT832908 832921 COARSE POINT837288 837301 COARSE POINT841668 841681 COARSE POINT846018 846031 COARSE POINT850398 850411 COARSE POINT854778 854791 COARSE POINT859158 859171 COARSE POINT863538 863551 COARSE POINT867918 867931 COARSE POINT871270 871299 ARGABRIGHTENING872290 873025 COARSE POINT877000 877080 COARSE POINT881568 881581 COARSE POINT884928 884941 COARSE POINT

Q8

908170 908170 EARTH POINT911028 911041 COARSE POINT915408 915421 COARSE POINT915724 915725 ARGABRIGHTENING


26




919788 919801 COARSE POINT924168 924181 COARSE POINT928548 928561 COARSE POINT929979 929980 ARGABRIGHTENING932928 932941 COARSE POINT937278 937291 COARSE POINT941658 941671 COARSE POINT945939 949841 COARSE POINT953058 953071 SAFE MODE957438 957451 SAFE MODE961818 961831 SAFE MODE966198 966211 SAFE MODE970578 970591 SAFE MODE974958 974971 SAFE MODE979308 979321 COARSE POINT983688 983701 COARSE POINT984430 984430 ARGABRIGHTENING987042 987042 ARGABRIGHTENING988068 988081 COARSE POINT990560 990560 ARGABRIGHTENING992448 992461 COARSE POINT996828 996841 COARSE POINT1001208 1001221 COARSE POINT1005588 1005601 COARSE POINT

27


Figure 4: The background flux time series for Q5–Q8 showing the average over all the modules, and twoindividual modules. The narrow spikes are Argabrightening events (continued on the next page.)

28



29


6 Time and Time Stamps


30


7 Ensemble Cotrending Basis Vectors

NEW: CBVs from clean reference ensembles are now generated directly by Pipeline instead of by the offlinetool originally used for Q1-Q8; users are provided with the set of CBVs in the FITS files at the MAST website.

7.1 Introduction

No change from the Data Characteristics Handbook

7.2 Generation of CBVs


7.3 Using CBVs


7.4 Quality of CBVs

SOC 8.0 occasionally produced low entropy CBVs, i.e. basis vectors that were representative of the systematicbehavior of only a small number of stars. Those bad vectors were noted in previous Data Release Notes.An improved algorithm in SOC 8.1 iteratively identifies these bad vectors and recreates them, excluding thetargets that were causing the low entropy. Therefore, we no longer report lists of low entropy vectors.

7.5 Cautions


7.6 Obtaining CBVs


31


8 Contents of Supplement

The Supplement is available as a full package or smaller set for each quarter, described below.

8.1 Q5 Supplement Files

8.1.1 Full Supplement Package

The large supplement package (DataReleaseNotes16Q5SupplementFull.tar) contains the files described below.

Pipeline Instance Detail Reports

q5-lc-pa-through-ppa-ksop1012-as-run-pipeline-instance-detail-report-120315.txtq5m1-sc-pa-through-pdc-ksop1012-as-run-pipeline-instance-detail-report-120320.txtq5m2-sc-pa-through-pdc-ksop1012-as-run-pipeline-instance-detail-report-120320.txtq5m3-sc-pa-through-pdc-ksop1012-as-run-pipeline-instance-detail-report-120320.txt

Data Anomaly Types

DataAnomalyTypes_Q5LC_LC_PID6361.txtDataAnomalyTypes_Q5SCM1_SC_PID6381.txtDataAnomalyTypes_Q5SCM2_SC_PID6399.txtDataAnomalyTypes_Q5SCM3_SC_PID6400.txt

Mod.out central motion

Q5LC_central_column_motion.txtQ5LC_central_row_motion.txt

Background Flux Time Series

Q5LC_background.txtQ5SCM1_background.txtQ5SCM2_background.txtQ5SCM3_background.txt

Argabrightening Detections

Q5LC_LC_ArgAgg_Summary.txtQ5SCM1_SC_ArgAgg_Summary.txtQ5SCM2_SC_ArgAgg_Summary.txtQ5SCM3_SC_ArgAgg_Summary.txt

Out of Fine Point Cadence Lists

Q5LC_LC_isNotFinePoint.txtQ5SCM1_SC_isNotFinePoint.txtQ5SCM2_SC_isNotFinePoint.txtQ5SCM3_SC_isNotFinePoint.txt

Zero Crossing Events

32


Q5LC_ZeroCrossings.txtQ5SCM1_ZeroCrossings.txtQ5SCM2_ZeroCrossings.txtQ5SCM3_ZeroCrossings.txt

Cotrending Basis Vector Principal Values

Q05-ksop-1012-r8.1-PID-6361_principal_values.txt

8.1.2 Small Supplement Package

The Supplement also contains a small package suitable for emailing (DataReleaseNotes16Q5SupplementShort.tar).The small package does not contain the following files:








Data Anomaly Types





Q6LC_background.txt

33


Q6SCM1_background.txtQ6SCM2_background.txtQ6SCM3_background.txt










The Supplement also contains a small package suitable for emailing (DataReleaseNotesQ616SupplementShort.tar).The small package does not contain the following files:







34



Data Anomaly Types














35



The Supplement also contains a small package suitable for emailing (DataReleaseNotesQ716SupplementShort.tar).The small package does not contain the following files:








Data Anomaly Types







Q8LC_LC_ArgAgg_Summary.txtQ8SCM1_SC_ArgAgg_Summary.txtQ8SCM2_SC_ArgAgg_Summary.txt

36


Q8SCM3_SC_ArgAgg_Summary.txt








The Supplement also contains a small package suitable for emailing (DataReleaseNotes16Q8SupplementShort.tar).The small package does not contain the following files:



37


9 References


38


A SOC 8.0 and 8.1 Improvements

The Release 16 data have all been re-processed with the SOC 8.1 Pipeline, with significant improvementsover the original processing; these data replace the previous data at the MAST website. The improvementsare summarised here.

A.1 SOC 8.0 – Improvements to PDC

The Presearch Data Conditioning (PDC) module for long cadence data has been completely redesigned sincethe original processing of the Q5–Q8 data. The old PDC would occasionally distort astrophysical signals.In the new PDC this problem has been significantly reduced, however there are still some targets whereastrophysical signatures have been removed or instrumental signatures have been retained. Hence, SOC 8.0results are better at preserving astrophysical signatures, but also may retain some instrumental signaturesthat were better corrected by SOC 7.0. Future reprocessing efforts are likely to bring further improvementsto the light curves produced by the Kepler pipeline.

For details on the new PDC data, see the Archive Manual. Also, please note that even though new PDCkeywords are populated in the FITS headers of short cadence data, the improvements to PDC do not applyto short cadence light curves at this time. We anticipate a future version of PDC that will correct the shortcadence light curves. For now, users are encouraged to use the GO tool designed for this purpose and thereleased CBVs.

A.2 SOC 8.0 – New FITS header keywords

Many new keywords can be found in the headers of the version 2.1 FITS files. For details of these, please seethe Archive Manual. 3-, 6- and 12-h CDPP, flux fraction, and crowding have been extracted from the FITSfiles and are available via the data search page at MAST. Values are also provided for all past quarters.

A.3 SOC 8.0 – Improved World Coordinates in Full Frames Images

See Section 1 for a discussion of the improved WCS.

A.4 SOC 8.1 – Additional Improvements

An incremental version of the pipeline was released for the processing of Q5–Q8. Improvements to theprocessing include an update to the Sudden Pixel Sensitive Dropout (SPSD) corrector in PDC, to improvethe quality of the PDCSAP FLUX time series. Also, as described in Section 7.4, the impact of low entropyCBVs has been mitigated by iteratively identifying the culprit targets and removing them from the fit.

39


B Problems with Q8, month 2 short-cadence data

(This appendix is reproduced from the original Q8 Data Release Notes 11.)

There were issues with the processing of short-cadence data taken during Quarter 8 month 2. The largedata gap between SC CIN 945940 and 949840 due to the safe mode caused problems with the harmonic fittingroutine near the gap. The result is that a number of short-cadence light curves contain artifacts similar tothat shown in Figure 5. Since this issue only affects pre-search data conditioned (PDC) light curves, werecommend that users consider using simple aperture photometry (PA) data until this issue can be resolved(see A Word of Caution to Users, p7).

Figure 5: Plotted in blue is the simple aperture photometry data and in red is the pre-search data conditioned(PDC) flux. Issues with the harmonic fitting caused some SC PDC fluxes to contain artifacts such as this.

40

Documents

Kepler Data Release 16 Notes Q5{Q8 - archive.stsci.eduarchive.stsci.edu/kepler/release_notes/release... · KSCI-19056-001: Kepler Data Release 16 Notes A Word of Caution to Users