The Scope of DR10

The new data in DR10 are:

1. 684,000 new optical spectra from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS), and new reductions for all BOSS spectra
2. Entirely new high resolution, infrared spectra for 57,454 Milky Way stars from the SDSS-III Apache Point Observatory Galactic Evolution Experiment (APOGEE), with stellar parameters, elemental abundances, and precise radial velocities

Jump to:

• The Scope of DR10 Optical data
• The Scope of DR10 Infrared data

SDSS-III has committed to publicly release its raw and reduced data sets. We are doing so using the Catalog Archive Server for retrieval of catalog data from a powerful SQL database and a Science Archive Server for retrieval of calibrated spectra and images.

Optical Data

SDSS Optical data encompass the entirety of the original SDSS-I and -II imaging and spectroscopy, along with the follow-on SEGUE and BOSS surveys. All data previously released in DR1-DR9 are included in DR10.

To check whether a location is covered in DR10 optical data, please use the form below. Enter RA/Dec coordinates in the box, in decimal degrees, and click Submit. Your coordinates will be loaded into the DR10 Science Archive Server (SAS). If your point is in the DR10 optical survey area, results will include links to all available SDSS imaging and optical spectroscopic data.

SDSS Optical Data RA/Dec Coverage Check:

180.00 50.00

DR10 imaging and optical spectroscopic coverage in Equatorial coordinates (plot centered at RA = 6h, or 90 deg.)

The optical data are defined as a set of photometric runs and a set of spectroscopic plates (see the basics on imaging and spectroscopy). We provide links here to ASCII and FITS lists of the runs and the plates. These lists are essentially a summary of all of the data in the data release.

• List of runs: photoRunAll-dr10.par, photoRunAll-dr10.fits
• List of plates: plates-dr10.par, plates-dr10.fits

Optical imaging data statistics

Total unique area covered	14,555 square degrees
Total area of imaging (including overlaps)	31,637 square degrees (excluding supernova runs)
Individual image field size	1361x2048 pixels (0.0337 square degrees)
Number of individual fields	938,046 (excluding supernova runs)
Number of catalog objects	1,231,051,050
Number of unique detections	932,891,133
Number of unique, primary sources	Total 469,053,874 Stars 260,562,744 Galaxies 208,478,448 Unknown 12,682
Effective wavelengths and magnitude limits (95% completeness for point sources)	u g r i z 3551 Å 4686 Å 6165 Å 7481 Å 8931 Å 22.0 22.2 22.2 21.3 20.5
Median PSF FWHM, r-band	1.3 arcsec
Pixel scale	0.396 arcsec
Exposure time per band	53.9 sec
Time difference between observations of each band	71.72 sec (in riuzg order)
Relative photometric calibration accuracy (RMS) (Padmanabhan et al. 2008)	u g r i z 1.3% 0.8% 0.8% 0.7% 0.8%
Global astrometric precision	0.1 arcsec rms (absolute)

Optical spectroscopic data statistics

	SDSS spectrograph	BOSS spectrograph
Area covered	Full unique coverage 9274 square degrees SEGUE-1 coverage 1438 square degrees SEGUE-2 coverage 1317 square degrees Legacy coverage 7966 square degrees	Full unique coverage 6,373 square degrees
Number of plates	Category Total Good/ marginal Primary All programs 2880 2764 2654 Legacy 1926 1869 1794 SEGUE-1 442 427 407 SEGUE-2 211 211 204 Special 301 257 246	Category Total Good/ marginal Primary All programs 1622 1515 1489 BOSS 1545 1485 1467 Special 77 30 22
Plate area	1.49 deg radius, 6.97 deg2	1.49 deg radius, 6.97 deg2
Fibers per plate	640	1000
Numbers of spectra	Category Total On good or marginal plates Unique All programs 1,843,200 1,768,960 1,629,129 Main galaxy targets 778,410 755,111 711,726 LRG targets (excluding Main) 106,650 103,662 95,990 SEGUE-1 targets 250,422 242,008 220,851 SEGUE-2 targets 128,112 128,112 118,151 Stars 600,967 577,157 521,990 Galaxies 952,740 921,007 860,836 Quasars 130,300 126,368 116,003 Skies 110,288 103,046 93,187 Unknown 48,905 41,382 37,113	Category Total Unique Total 1,507,954 1,391,792 Stars 159,327 144,968 Galaxies 927,844 859,322 Quasars 182,009 166,300 Sky 144,503 138,491 Unknown 101,550 89,003
Wavelength coverage	3800 to 9200 Å	3600 to 10,400 Å
Resolution	1800 to 2000	1400 to 2600 Å
Median S/N	at g(fiber) = 20.2 mag, 4.2 per pixel (Legacy) 7.0 per pixel (SEGUE-1, -2)	at i(fiber) = 21 mag, 6.1 per pixel
Typical redshift accuracy	30 km/s rms for main galaxy sample (from repeat observations) 4.0 km/s rms for SEGUE near g=18th mag (from repeat observations) 1.8 km/s systematic limit for high signal-to-noise stars	65 km/s rms for Luminous Galaxy sample (from repeat observations) 1.8 km/s systematic limit for high signal-to-noise stars
Approximate magnitude limits (Corrected for Galactic dust extinction)	Main sample galaxies Petrosian r < 17.77 Strauss et al. (2002) Luminous Red Galaxies Petrosian r < 19.2 Eisenstein et al. (2001) z < 3 quasars PSF i < 19.1 Richards et al. (2002) z > 3 quasars PSF i < 20.2 Richards et al. (2002) SEGUE-1 Faint PSF 17.8 < r < 20.1 Yanny et al. (2009) SEGUE-1 Bright PSF r < 17.8 Yanny et al. (2009) SEGUE-2 PSF r < 20.2	Luminous Galaxies i < 19.9 White et al. (2011) Quasars g < 22 i < 22 Ross et al. (2012)

Infrared (APOGEE) Data

DR10 includes the first data released by the APOGEE survey. SDSS APOGEE infrared spectroscopy data are defined by a set of field centers, defined in galactic coordiantes. Each field may have had multiple plates observed. (See the APOGEE target selection documentation for more on the concepts of fields and plates.)

Index map showing locations of APOGEE fields with spectra in DR10. Note that different fields have been visited different numbers of times, and not all fields have been completed. The figure is an Aitoff projection of 2MASS survey data in galactic coordiantes.

The links below provide FITS lists of the field centers, associated plates, and the dates those plates were were observed. See the APOGEE infrared spectroscopic data page for more details.

• List of field centers: apogeeField_DR10.fits
• List of visits to each field: allPlates-v304.fits
• Catalog parameters for each star (150 Mbytes): allStar-v304.fits
• Catalog parameters for each visit spectrum (115 Mbytes): allVisit-v304.fits

More APOGEE fields will be included in Data Releases 11 and 12.

Infrared (APOGEE) spectroscopic data statistics

Data	Category Dates Observed (inclusive) MJD Commissioning 2011 May 22 - 2011 Jul 18 55703-55760 Survey Year 1 2010 Aug 31 - 2012 Jul 13 55804-56121
Number of plates	Category Total All plates 281 Commissioning 51 Survey Year 1 232 Note: Some plates were observed in both phases
Number of visits	Category Total All visits 684 Commissioning 98 Survey Year 1 586
Plate area	Plate radius is a function of target selection. 1.49 deg radius, 6.97 deg2 0.99 deg radius, 3.08 deg2 0.89 deg radius, 2.49 deg2 0.75 deg radius, 1.77 deg2 0.50 deg radius, 0.79 deg2
Fibers per plate (for standard survey and ancillary programs)	Total 300 Science 230 Telluric Standard 35 Sky 35
Numbers of stellar spectra	Category Visits Unique Objects Total 178,397 57,454 Survey Stars 153,454 47,452 Ancillary Targets 8,894 3,344 Telluric Standards 24,283 7,003
Wavelength coverage	1.51 to 1.69 μm
Resolution	R = 21,500-24,000 depending on wavelength and fiber.
Spectral Sampling	Category 1.51-1.58μm 1.58-1.645μm 1.645-1.695μm Single Exposure 0.326 Å/pixel 0.283 Å/pixel 0.236 Å/pixel Dithered Pair 0.163 Å/pixel 0.142 Å/pixel 0.118 Å/pixel
Median S/N	at H = 11.0, S/N ~ 100 per dithered pixel in 1 hours total exposure at H = 12.2, S/N ~ 100 per dithered pixel in 3 hours total exposure
Typical velocity accuracy	< 100 m/s per visit with S/N > 20
Approximate magnitude limits (at S/N = 100 per dithered pixel for completed plates)	1 hour field H < 11.0 3 hour field H < 12.2 10 hour field H < 12.8 24 hour field H < 13.2

Copyright © 2010-2013 SDSS-III