J/A+A/513/A38 RZJHK photometry for stellar sources in Serpens (Spezzi+, 2010)
A deep optical/near-infrared catalog of Serpens.
Spezzi L., Merin B., Oliveira I., van Dishoeck E.F., Brown J.M.
<Astron. Astrophys. 513, A38 (2010)>
=2010A&A...513A..38S 2010A&A...513A..38S
ADC_Keywords: Molecular clouds ; Photometry, CCD ; Photometry, infrared
Keywords: catalogs - stars: formation - stars: low-mass - stars: brown dwarfs -
ISM: clouds - ISM: individual objects: Serpens
Abstract:
We present a deep optical/near-infrared imaging survey of the Serpens
molecular cloud. This survey constitutes the complementary optical
data to the Spitzer "Core To Disk" (c2d) Legacy survey in this cloud.
The survey was conducted using the Wide Field Camera at the Isaac
Newton Telescope. About 0.96 square degrees were imaged in the R and Z
filters, covering the entire region where most of the young stellar
objects identified by the c2d survey are located. 26524 point-like
sources were detected in both R and Z bands down to R=24.5mag and
Z=23mag with a signal-to-noise ratio better than 3. The 95%
completeness limit of our catalog corresponds to 0.04 solar masses
for members of the Serpens star forming region (age 2Myr and distance
260pc) in the absence of extinction.
Adopting the typical extinction of the observed area (Av=7mag), we
estimate a 95% completeness level down to 0.1 solar masses. The
astrometric accuracy of our catalog is 0.4-arcsec with respect to the
2MASS catalog. Our final catalog contains J2000 celestial coordinates,
magnitudes in the R and Z bands calibrated to the SDSS photometric
system and, where possible, JHK magnitudes from 2MASS for sources in
0.96 square degrees in the direction of Serpens. This data product has
been already used within the frame of the c2d Spitzer Legacy Project
analysis in Serpens to study the star/disk formation and evolution in
this cloud; here we use it to obtain new indications of the disk-less
population in Serpens.
Description:
Photometry in the optical/near-infrared pass-bands (RZJHK) for 28995
stellar sources in the Serpens molecular cloud. Sources are spread
over 0.96 square degrees.
For each source equatorial coordinates (RA and DEC at J2000) and
magnitudes in the RZJHK bands are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 94 28995 Photometric catalog for 28995 stellar sources
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+A/330/990 : VRIJHK photometry of Serpens cloud core (Giovannetti+ 1998)
J/A+A/421/623 : ISOCAM survey of YSOs in Serpens Cloud Core (Kaas+, 2004)
J/A+A/425/927 : Stellar objects in the Serpens cloud field (Klotz+, 2004)
J/ApJ/663/1149 : Spitzer survey of Serpens YSO population (Harvey+, 2007)
J/ApJ/669/493 : Spitzer/Chandra YSOs in Serpens cloud core (Winston+, 2007)
J/A+A/463/275 : Chandra obs. of Serpens star-forming region (Giardino+, 2007)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 11 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
13- 23 F11.7 deg DEdeg Declination in decimal degrees (J2000)
25- 30 F6.3 mag Rmag R-band magnitude in AB system (1)
32- 36 F5.3 mag e_Rmag Photometric error on R-band magnitude
38- 43 F6.3 mag Zmag Z-band magnitude in AB system (1)
45- 49 F5.3 mag e_Zmag Photometric error on Z-band magnitude
51- 57 F7.3 mag Jmag ?=-99. J-band magnitude from 2MASS
59- 64 F6.3 mag e_Jmag ?=-9.999 Photometric error on J-band magnitude
66- 72 F7.3 mag Hmag ?=-99. H-band magnitude from 2MASS
74- 79 F6.3 mag e_Hmag ?=-9.999 Photometric error on H-band magnitude
81- 87 F7.3 mag Kmag ?=-99. K-band magnitude from 2MASS
89- 94 F6.3 mag e_Kmag ?=-9.999 Photometric error on K-band magnitude
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Note (1): R and Z magnitudes are calibrated to the SLOAN photometric system.
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Acknowledgements:
Loredana Spezzi, lspezzi(at)rssd.esa.int
(End) L. Spezzi [ESA-ESTEC, The Netherlands], Patricia Vannier [CDS] 11-Feb-2010