J/ApJS/210/22 Herschel Stripe 82 survey (HerS) first catalog (Viero+, 2014)
The Herschel stripe 82 survey (HerS): maps and early catalog.
Viero M.P., Asboth V., Roseboom I.G., Moncelsi L., Marsden G.,
Mentuch Cooper E., Zemcov M., Addison G., Baker A.J., Beelen A., Bock J.,
Bridge C., Conley A., Devlin M.J., Dore O., Farrah D., Finkelstein S.,
Font-Ribera A., Geach J.E., Gebhardt K., Gill A., Glenn J., Hajian A.,
Halpern M., Jogee S., Kurczynski P., Lapi A., Negrello M., Oliver S.J.,
Papovich C., Quadri R., Ross N., Scott D., Schulz B., Somerville R.,
Spergel D.N., Vieira J.D., Wang L., Wechsler R.
<Astrophys. J. Suppl. Ser., 210, 22 (2014)>
=2014ApJS..210...22V 2014ApJS..210...22V
ADC_Keywords: Galaxies, IR ; Photometry, millimetric/submm ; Surveys
Mission_Name: Herschel
Keywords: cosmology: observations; galaxies: evolution; infrared: galaxies
large-scale structure of universe; submillimeter: galaxies
Abstract:
We present the first set of maps and band-merged catalog from the
Herschel Stripe 82 Survey (HerS). Observations at 250, 350, and
500µm were taken with the Spectral and Photometric Imaging Receiver
(SPIRE) instrument aboard the Herschel Space Observatory. HerS covers
79deg2 along the SDSS Stripe 82 to an average depth of 13.0, 12.9,
and 14.8mJy/beam (including confusion) at 250, 350, and 500µm,
respectively. HerS was designed to measure correlations with external
tracers of the dark matter density field --either point-like (i.e.,
galaxies selected from radio to X-ray) or extended (i.e., clusters and
gravitational lensing)-- in order to measure the bias and redshift
distribution of intensities of infrared-emitting dusty star-forming
galaxies and active galactic nuclei. By locating HerS in Stripe 82, we
maximize the overlap with available and upcoming cosmological surveys.
The band-merged catalog contains 3.3x104 sources detected at a
significance of ≳3σ (including confusion noise).
Description:
Observations cover 79deg2 in the equatorial Stripe 82, spanning
13° to 37° in R.A., and -2° to 2° in declination. Two
sets of maps at 250, 350, and 500um were made in order to accommodate
different science goals. For the first set, we used a tangent plane
(TAN) projection with pixel sizes of 6, 8.33, and 12 arcsec for the
250, 350, and 500um maps, respectively. These values are typical for
SPIRE maps, chosen to correspond to roughly one-third of the size of
the SPIRE beams (18.1, 25.2, and 36.6 arcsec FWHM). Since the HerS
field overlaps with the equatorial Stripe observed by the ACT (Atacama
Cosmology Telescope), we also made maps using the nominal ACT map
projection for cross-analysis of the two data sets. The HerS-ACT maps
were made using a cylindrical equal-area (CEA) projection with pixel
sizes of 29.7 arcsec in all three bands, corresponding to the nominal
ACT pixel size. The ISO-8601 observation date is 2012-07-23 for all maps.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 106 32815 *HerS band-merged catalog
maps/* . 7 The 6 SPIRE maps, in FITS format, in 250, 350 and
500um bands in the tangent plane projection or
in the cylindrical equal-area projection
list.dat 94 6 Summary of the 6 Herschel/SPIRE maps available
in subdirectory maps
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Note on catalog.dat: We caution the user that because of the uneven coverage of
the survey, the density of high signal-to-noise sources is higher in the deep
stripes. Thus, though the catalog is suitable for applications such as
cross-identification of bright objects, or cross-correlations given
appropriate weights, etc., it should not be used for estimating statistically
rigorous quantities such as source counts. That does not mean that they cannot
be measured, just that such operations are better done using the maps
themselves, where the detailed properties of the extraction technique versus
survey depth, etc., and the resulting catalog, can be properly simulated.
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See also:
VI/139 : Herschel Observation Log (Herschel Science Centre, 2013)
VIII/95 : Herschel Multi-tiered Extragalactic Survey (Oliver+, 2012)
J/MNRAS/419/377 : HerMes point source catalogues (Smith+, 2012)
J/ApJ/756/28 : IR counterparts to submm H-ATLAS galaxies (Kim+, 2012)
J/MNRAS/415/2336 : Herschel-ATLAS Science Demonstration Catalog (Rigby+, 2011)
J/A+A/532/A90 : PEP DR1 public catalogs (Lutz+, 2011)
J/MNRAS/417/2239 : SPIRE (f250um>17.4mJy) GOODS-N galaxies (Symeonidis+, 2011)
J/MNRAS/409/L13 : Herschel-SPIRE radio galaxies (Chapman+, 2010)
J/MNRAS/409/2 : Herschel SED model parameters (Rowan-Robinson+, 2010)
http://www.astro.caltech.edu/hers/ : HerS home page
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 9 F9.6 deg RAdeg Right ascension (J2000)
11- 19 F9.6 deg DEdeg Declination (J2000)
21- 27 F7.2 mJy F250 [27/1115] Herschel/SPIRE 250um flux density
29- 33 F5.2 mJy s_F250 1σ instrumental error on F250
35- 39 F5.2 mJy e_F250 [8/17] 1σ total error on F250
41- 48 F8.5 --- CHI250 [0.4/49] 250um fit χ2
50- 55 F6.2 mJy F350 [0/913] Herschel/SPIRE 350um flux density
57- 61 F5.2 mJy s_F350 1σ instrumental error on F350
63- 67 F5.2 mJy e_F350 [8/49] 1σ total error on F350
69- 76 F8.5 --- CHI350 350um fit χ2
78- 83 F6.2 mJy F500 [0/718] Herschel/SPIRE 500um flux density
85- 89 F5.2 mJy s_F500 ? 1σ instrumental error on F500
91- 95 F5.2 mJy e_F500 [8/44]? 1σ total error on F500
97-104 F8.5 --- CHI500 [0.4/5] 500um fit χ2
106 I1 --- Reg [0/2]? Region flag (1)
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Note (1): Flag as follows:
0 = source in the "wide" regions (having the nominal coverage of two scans)
1 = source in the "deep" regions (having three or rarely four) scans
2 = source on the "edges" (regions with only one scan of coverage)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.2 arcsec/pix Scale [6/29.7] Scale of the image
26- 30 I5 --- Nx Number of pixels along X-axis
32- 35 I4 --- Ny Number of pixels along Y-axis
37- 42 I6 Kibyte size Size of FITS file
44- 46 I3 um Band [250/500] Observed SPIRE band
48- 50 A3 --- Proj Projection used (TAN or CEA) (1)
52- 94 A43 --- FileName Name of FITS file, in subdirectory maps
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Note (1): Set of maps as follows:
TAN = tangent plane projection
CEA = cylindrical equal-area projection: using the Atacama Cosmology
Telescope (ACT) cross-analysis
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History:
Copied at: http://www.astro.caltech.edu/viero/hers/catalogs/
herscatalogue3sig250noextended.fits (v2.0, uploaded Nov 18, 2013)
(End) Emmanuelle Perret [CDS] 02-Apr-2014