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J/A+A/458/789       ISOCAM survey of Serpens/G3-G6           (Djupvik+, 2006)

A multi-wavelength census of star formation activity in the young embedded cluster around Serpens/G3-G6. Djupvik A.A., Andre P., Bontemps S., Motte F., Olofsson G., Gaalfalk M., Floren H.-G. <Astron. Astrophys. 458, 789 (2006)> =2006A&A...458..789D
ADC_Keywords: Infrared sources ; YSOs ; Photometry, infrared Keywords: stars: formation - stars: pre-main-sequence - stars: luminosity function, mass function - ISM: jets and outflows - stars: low-mass, brown dwarfs Abstract: We present results from an ISOCAM survey in the two broadband filters LW2 (5-8.5um) and LW3 (12-18um) of a 19'x16' field called Serp_NH3 centred on the optical group Serpens/G3-G6. A total of 186 sources were detected in the 6.7um band and/or the 14.3um band to a limiting sensitivity of ∼2mJy. These have been cross-correlated with the 2MASS catalogue and are all listed in table1. Deep follow-up photometry in the Ks band obtained with Arnica at the Nordic Optical Telescope (NOT) is listed in table2. Deep L' band photometry of selected sources using SIRCA at the NOT is listed in table3. Continuum emission at 1.3mm and 3.6cm was observed with IRAM and VLA, respectively, and deep imaging in the 2.12um S(1) line of H2 was obtained with NOTCam at the NOT. We find strong evidence for a stellar population of 31 Class II sources (listed in table5), 5 flat-spectrum sources, 5 Class I sources (listed in table4), and two Class 0 sources. Our method does not sample the Class III sources. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 101 186 ISOCAM 6.7 and 14.3um photometry of the 177 detections in the Ser/G3-G6 complex. table2.dat 66 1148 Ks band photometry from Arnica/NOT of 1148 sources in a 8'x8' subregion of the ISOCAM coverage. table3.dat 92 46 L' band photometry from SIRCA/NOT of 46 sources detected in 12 pointed observations in the Ser/G3-G6 complex.
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ISO ISO source number in Serp-NH3 region 5- 6 I2 h RAh Right ascension (J2000) (1) 8- 9 I2 min RAm Right ascension (J2000) (1) 11- 14 F4.1 s RAs Right ascension (J2000) (1) 16 A1 --- DE- Declination sign (J2000) (1) 17- 18 I2 deg DEd Declination (J2000) (1) 20- 21 I2 arcmin DEm Declination (J2000) (1) 23- 24 I2 arcsec DEs Declination (J2000) (1) 27- 31 F5.2 mag Ksmag ? Ks band magnitude (from Arnica/NOT) 33 A1 --- n_Ksmag [1] fluxes added from the two resolved objects 35- 38 F4.2 mag e_Ksmag ? rms uncertainty on Ksmag 40- 44 I5 mJy F6.7um ? Flux density at 6.7um 46- 48 I3 mJy e_F6.7um ? rms uncertainty on F6.7um 50- 54 I5 mJy F14.3um ? Flux density at 14.3um 56- 58 I3 mJy e_F14.3um ? rms uncertainty on F14.3um 60 A1 --- f_F6.7um ISOCAM 6.7um detection flag (3) 61 A1 --- n_F6.7um ISOCAM 6.7um photometry flag (4) 62 A1 --- f_F14.3um ISOCAM 14.3um detection flag (3) 63 A1 --- n_F14.3um ISOCAM 14.3um photometry flag (4) 65- 80 A16 --- 2MASS Name of 2MASS counterpart 82- 85 I4 --- NOT ? ID number of Arnica/NOT counterpart 87-101 A15 --- ONames Other identification
Note (1): The ISOCAM positions are estimated to be accurate to ±3" on the average. Note (3): Detection flag as follows: A = certain B = probably C = uncertain detection N = not detected Note (4): Photometry flag as follows: 0 = no flux measurement attempted 1 = ok 2 = may be affected by a not perfectly removed cosmic ray 3 = nebulous background 4 = noisy sky 5 = may be affected by proximity to the dead column 6 = may be affected by a not perfectly removed memory signal 7 = unresolved multiple 8 = proximity to a bright neighbour 9 = object located close to the edge
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- NOT Arnica/NOT source number 7- 8 I2 h RAh Right ascension (J2000) (1) 10- 11 I2 min RAm Right ascension (J2000) (1) 13- 17 F5.2 s RAs Right ascension (J2000) (1) 19 A1 --- DE- Declination sign (J2000) (1) 20- 21 I2 deg DEd Declination (J2000) (1) 23- 24 I2 arcmin DEm Declination (J2000) (1) 26- 29 F4.1 arcsec DEs Declination (J2000) (1) 31- 35 F5.2 mag Ksmag ? Ks band magnitude 37- 41 F5.2 mag e_Ksmag ? rms uncertainty on Ksmag 43- 66 A24 --- Com Other cross-identification or comment
Note (1): The positional accuracy is about ±0.4".
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 --- SIRCA SIRCA/NOT source number 4 I1 --- n_SIRCA [4]? Note on SIRCA-ID number (1) 6- 7 I2 h RAh Right ascension (J2000) (2) 9- 10 I2 min RAm Right ascension (J2000) (2) 12- 16 F5.2 s RAs Right ascension (J2000) (2) 18 A1 --- DE- Declination sign (J2000) (2) 19- 20 I2 deg DEd Declination (J2000) (2) 22- 23 I2 arcmin DEm Declination (J2000) (2) 25- 28 F4.1 arcsec DEs Declination (J2000) (2) 30- 34 F5.2 mag L'mag ? L' band magnitude 36- 39 F4.2 mag e_L'mag ? rms uncertainty on Lpmag 41- 45 F5.2 mag Ksmag ? Ks band magnitude (3) 47- 50 F4.2 mag e_Ksmag ? rms uncertainty on Ksmag 52- 67 A16 --- 2MASS ID of 2MASS cross-identification (- for non-detection) 69 I1 --- n_2MASS [3]? Note on 2MASS (4) 71- 73 I3 --- NOT ? ID of NOT/Arnica Ks cross-identification 74 A1 --- n_NOT [n-] n: observations are not available -: non-detection 76- 78 I3 --- ISO ?=- ID of ISOCAM cross-identification (- for non-detection) 80 I1 --- n_ISO [1/3]? Note on ISO (4) 82- 92 A11 --- ONames Other cross-identification
Note (1): Note 4 indicates that the coordinates refer to ISO source. A marginal L' band detection was made of a faint extended object, for which neither flux nor position was calculated. Note (2): Positions are from 2MASS when a 2MASS source is available, otherwise ISO positions or positions found from the L' band image with respect to other sources is used. For IDs 21 and 22 the positions are from Arnica/NOT. Note (3): The Ks magnitudes are from 2MASS if available, otherwise from Arnica/NOT (table2) if available. Note (4): Note on ISO as follows: 1 = Not spatially resolved from ISO-78 2 = Not spatially resolved from ISO-82 3 = Sources 15 and 16 are not spatially resolved by ISOCAM and 2MASS.
Nomenclature note: Serpens/G3-G6 = CoKu Ser G3 to CoKu Ser G6 in Simbad. Acknowledgements: Amanda Djupvik, amanda(at)not.iac.es
(End) Patricia Vannier [CDS] 23-Aug-2006
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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