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S5 Data Release                                              Version 1.0
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The Spitzer SDSS Statistical Spectroscopic Survey (S5) is a Cycle-5 
Spitzer program to acquire 5 to 40 micron mid-infrared spectroscopy 
of a representative sample of galaxies from SDSS, selected for having
prior photometric coverage in the UV and Halpha fluxes greater than 
3 x 10^-15 erg/s/cm^2. The full S5 sample includes 292 star-forming 
galaxies from the SDSS sample.

The S5 project is an extension of the SSGSS over a larger set of SDSS 
sources (292) and narrower redshift range. In addition, the S5 sample 
was selected without mid-IR prior. For further information concerning 
the SSGSS please follow the link 
[http://irsa.ipac.caltech.edu/data/SPITZER/SSGSS/]

These data represent the first public data release of the full S5 sample. 
The dataset includes short-low, long-low and short-high IRS spectroscopy
for the full sample. Sources have been selected in 48 patches of at least
5 sources spatially separated by less than 30' in order to take 
advantage of the cluster observing mode of Spitzer.

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The characteristics of these data are:

Instrument: IRS
Modules: SL1, SL2, LL1, LL2, SH
Resolution:
     Low Res: R~57-127
     Hi Res: R~600
Exposure time per pointing: 
     Low Res (LL): 2 cycles of 30 sec
     Low Res (SL): 1 cycle of 60 sec
     Hi Res (SH) : 2 cycles of 120 sec
Observation dates:
     All observations have been gathered between June 3rd, 2008 and
     December 11th, 2008 and, between March 3rd, 2009 and April 11th, 2009.

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The file sets are named as follows:

1. lores/S5_[XX]_[Y]_lores.fits
     The concatenated short-low and long-low spectrum for galaxy
     number [Y] in field [XX]. Order overlap regions are combined by 
     weighted mean and channel overlap regions are combined by either 
     a cut or weighted mean.  

     The spectra are stored in fits format in extension 1 and contain 
     structures with the following tags: 

     WAVE:
          Wavelength in microns

     FLUX:
          Flux in Janskys

     ERROR:
          Flux Error in Janskys 

     BITFLAG:
          Bit-flags generated by SPICE. In the case of combined files 
     (all but file set 1), the bit flag of the first position is used 

     ORDERFLAG:
          1 for regions in which order overlap occurs, 0 otherwise.

     CHANNELFLAG:
          Set to 1, 2, 3, or 4 for channels: SL2, SL1, LL2 and LL1
     respectively. For channel overlap regions combined by weighted mean,
     CHANNELFLAG is set to the mean of the two flags. For example, the 
     long-low right and long-low level combined overlap region is set to 
     3.5.

2. hires/S5_[XX]_[Y]_hires.fits
     The short-high spectrum for galaxy number [Y] in field [XX]. Order
     overlap regions are combined by weighted mean. 

     The spectra are stored in fits format in extension 1 and contain 
     structures with the following tags:

     ORDER:
          IRS high-resolution short wavelength module order index

     WAVELENGTH:
          Wavelength in microns

     FLUX:
          Flux in Janskys

     ERROR:
          Flux error in Janskys

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Target Informations:
     Additional target informations from ancillary SDSS optical 
     spectroscopy catalogs is featured in header. In particular
     we included the following keywords

     SRCNAME:
          String providing a SDSS-like source name formatted as
          S5_Jhhmmss.ss+ddmmss.s where hhmmss.ss and ddmmss.s are
          the target positions RA and DEC in h:m:s and d:m:s units

     S5XID:
          3 digit S5 specific source ID. The first two digits are
	  the field number [XX]. The last digit is the source 
	  number in the field, [Y].

     SRCRA:
          SDSS Right ascension in degrees (double precision)

     SRCDEC:
          SDSS Declination in degrees (double precision)

     REDSHIFT:
          SDSS Optical spectroscopic redshift (double precision)


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These data and the S5 project in general are described in full in:
     Bertincourt, B. et al. (2011), in prep

Further information may also be found at the S5 home page:
     http://s5.astro.columbia.edu/

Additional information on the data reduction process, including
definition of BITFLAG values can be found in the SPICE GUI help tool: 
     http://ssc.spitzer.caltech.edu/postbcd/spice.html

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S5 team contacts:. David Schiminovich (ds@astro.columbia.edu)
		 . Ben Bertincourt (bbertinc@astro.columbia.edu)
		 . Matt O'Dowd (matt@astro.columbia.edu)
		 . Ronin Wu (roninwu@nyu.edu)
December 2010