2008. 2. 19.SDSS-KSG 08 Workshop1 The SDSS DR7 and KIAS SDSS mirror Won-Kee Park ARCSEC, Sejong University 2008 SDSS-KSG Workshop

2008. 2. 19. SDSS-KSG 08 Workshop 1

The SDSS DR7 and KIAS SDSS

mirror

Won-Kee Park

ARCSEC, Sejong University

2008 SDSS-KSGWorkshop

SDSS-KSG 08 Workshop 22008. 2. 19.

SDSS – Current Status

DR6 is the current public release Released on Jun. 2007

DR7.1 is open to SDSS collaboration Last week

“DR7” is planned to be released to public around Oct. 2008 Final release of SDSS II - contains all

observational data through the end of the project.


SDSS DR7 – Release Schedule

Old planDR7 in 2008 Spring

Contains the data observed till 2007 Summer

DR8, the final release of SDSS-II, at the end of 2008

Contains the data till the end of SDSS-II, Jun. 2008


SDSS DR7 – Release Schedule

New planDR7.1 to collaboration group only

Announced on Feb. 2007

DR7.2(“DR7”), the final release of SDSS II, on Oct. 2008


SDSS DR7.1 Coverage

Imaging Legacy survey

Coverage : 8417 square degree footprint area is same with that of DR6. i.e. No

more legacy imaging observation since DR6

SEGUE Coverage : 2400 square degree ~ 1240 square degree more than DR6


SDSS DR7.1 Coverage

SpectroscopyLegacy survey

Coverage : 7470 square degrees Almost all the gaps are now filled in the

northern galactic hemisphere Spectra obtained for over ~1,200,000 objects

SEGUE Coverage : 780 square degree ( 125 more) Spectra obtained for over ~150,000 objects


DR7.1 Legacy survey spectroscopy

coverage


DR7.1 Legacy survey

spectroscopy coverage


DR6 Legacy survey

spectroscopy coverage


SDSS DR7.1 - Depth

Imaging


SDSS DR7.1 - Depth

Spectroscopy


NYU Value Added Galaxy Catalog

A galaxy spectrscopic catalog not very large in size, for easy handling in a computer

Based on Princeton Reduction for photometry & spectroscopy Results in lower variance in large-scale errors in the calibration in

photometry

Also offers the matching results with other catalogs RC3, 2dFGRS, 2MASS..


NYU Value Added Galaxy Catalog

DR7 – based on SDSS DR7.1Released on Jan. 2008 to SDSS

collaborationCatalogs

Includes SDSS Main galaxy samples Contains ~2,600,000 entries

Preparation for further application is being done at KIAS


About SDSS DR7(7.2)

Imaging Coverage…

Spectroscopy Coverage Include the result of observation till

spring 2008.Will fill the gaps completely (hopefully)


About SDSS DR7(7.2)

Improvements in the data processingSpectroscopy - improvement in flat-fielding &

wavelength calibration Affect stellar photometry, but very minor effects for

most extragalactic objects

Imaging - improvement in image processing for the crowded field in lower galactic latitute region


KIAS SDSS Mirror

HardwareWindows 2003 Server machine

Xeon dual core, 4GB RAM, 14TB disk spaceLinux machine 14TB disk space

Quad core, 4GB RAM, 14TB disk space

SoftwareMS-SQL for SDSS database management


KIAS SDSS Mirror

Available dataCatalogs for BESTDR6, and SEGUEDR6

datasetRaw image - DR5 dataset

Data AccessData can be accessed within KIAS via

NFS mount, for example.Web interface will be available soon


KIAS SDSS Mirror

Web interface (for CAS)http://sdss.kias.re.kr/

Will offer identical web interfaces as those in SDSS CAS DR6 (http://cas.sdss.org/dr6)

Various image tools


http://sdss.kias.re.kr/dr6/en


http://sdss.kias.re.kr/dr6/en/tools/chart/list.asp


KIAS SDSS Mirror Current Status

DB build for DR6 data query is being done now at KIAS (has been building since last friday…)

.. And Problem Access from outside of KIAS is NOT allowed due to internet secur

ity problem

So? Access will be allowed after the installation of firewall “soon” At present, guest account @ KIAS is offered upon request, to acc

ess the KIAS host as a gateway to KIAS SDSS mirror


Thank you

Documents

2008. 2. 19.SDSS-KSG 08 Workshop1 The SDSS DR7 and KIAS SDSS mirror Won-Kee Park ARCSEC, Sejong University 2008 SDSS-KSG Workshop