Getting all spectra and corresponding imaging data
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For your convenience, there is a variant of the spectroscopic data
set which has all spectra and corresponding object lists entries and
atlas images. It consists of the following set of file for each plate
of 640 fibers:
- spDiag-$mjd-$plate.par: the spectro1d summary
- spSpec-$mjd-$plate-$fiber.fit: the catalog of spectral lines per spectrum
- spPlate-$plate-$mjd.fits: the image of reduced spectra (1 spectrum per row)
- plPlugMapM-$plate-$mjd-$mapping.par: the mapping of targets to fibers
- spObj-$plate-$mjd-$rerun.fit: joined tsObj and spDiag and
plPlugMap data for all fibers, hdu 1 = best, hdu 2 = target
- spAtlas-$plate-$mjd-$fiber.fit: best and target atlas images for all 5 colors for all fibers
The data model for a spObj-*.fit file
is nearly the same as that for a tsObj file,
except that a tsObj file contains all imaging information
for all objects (bright and faint) in a particular 0.033
sq. deg. imaging field, while a spObj file contains all
imaging information for all fibers on a particular spectroscopic
plate, with an area of 7 sq. deg. spanning many imaging fields.
You can access these files, as well as catalogs of just the
redshifts, in bulk at the following locations:
The full set of plates
Just the redshifts
There are 4 catalogs by spectroscopic classification:
- Classified as galaxies:
gals-dr1.fit.gz, 276M
- Classified as quasars:
qsos-dr1.fit.gz, 37M
Note that the vetted DR1 quasar
catalog presented by Schneider et al. 2003 is now
available. The information contained in that catalog
supersedes the information contained in all other DR1 data
sources. We strongly recommend using that
catalog instead of the list given here.
- Classified as stars:
stars-dr1.fit.gz, 44M
- No classification possible, and sky fibers:
unks-dr1.fit.gz, 15M
There are 3 catalogs with those spectra targeted as part of one
of the tiled
samples:
What about objects not observed due to fiber collisions?
You will want the tiling information.
Last modified: Wed Oct 15 13:20:21 CDT 2003
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