2008. 2. 19.SDSS-KSG 08 Workshop1 The SDSS DR7 and KIAS SDSS mirror Won-Kee Park ARCSEC, Sejong...
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Transcript of 2008. 2. 19.SDSS-KSG 08 Workshop1 The SDSS DR7 and KIAS SDSS mirror Won-Kee Park ARCSEC, Sejong...
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-KSG 08 Workshop 32008. 2. 19.
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-KSG 08 Workshop 42008. 2. 19.
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-KSG 08 Workshop 52008. 2. 19.
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-KSG 08 Workshop 62008. 2. 19.
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
SDSS-KSG 08 Workshop 72008. 2. 19.
DR7.1 Legacy survey spectroscopy
coverage
SDSS-KSG 08 Workshop 82008. 2. 19.
DR7.1 Legacy survey
spectroscopy coverage
SDSS-KSG 08 Workshop 92008. 2. 19.
DR6 Legacy survey
spectroscopy coverage
SDSS-KSG 08 Workshop 142008. 2. 19.
SDSS DR7.1 - Depth
Imaging
SDSS-KSG 08 Workshop 162008. 2. 19.
SDSS DR7.1 - Depth
Spectroscopy
SDSS-KSG 08 Workshop 172008. 2. 19.
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..
SDSS-KSG 08 Workshop 182008. 2. 19.
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
SDSS-KSG 08 Workshop 192008. 2. 19.
About SDSS DR7(7.2)
Imaging Coverage…
Spectroscopy Coverage Include the result of observation till
spring 2008.Will fill the gaps completely (hopefully)
SDSS-KSG 08 Workshop 202008. 2. 19.
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
SDSS-KSG 08 Workshop 212008. 2. 19.
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
SDSS-KSG 08 Workshop 222008. 2. 19.
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
SDSS-KSG 08 Workshop 232008. 2. 19.
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
SDSS-KSG 08 Workshop 242008. 2. 19.
http://sdss.kias.re.kr/dr6/en
SDSS-KSG 08 Workshop 252008. 2. 19.
http://sdss.kias.re.kr/dr6/en/tools/chart/list.asp
SDSS-KSG 08 Workshop 262008. 2. 19.
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
SDSS-KSG 08 Workshop 272008. 2. 19.
Thank you