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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 94 28995 Photometric catalog for 28995 stellar sources
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
Bytes Format Units Label Explanations
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
Note (1): R and Z magnitudes are calibrated to the SLOAN photometric system.
Acknowledgements: Loredana Spezzi, lspezzi(at)
(End) L. Spezzi [ESA-ESTEC, The Netherlands], Patricia Vannier [CDS] 11-Feb-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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