II/270 TCS-CAIN: NIR Survey of the Galactic plane (Cabrera-Lavers+, 2006)
TCS-CAIN: A deep multicolor NIR survey of the Galactic plane. Cabrera-Lavers A., Garzon F., Hammersley P.L., Vicente B., Gonzalez-Fernandez C. <Astron. Astrophys. 453, 371 (2006)> =2006A&A...453..371C
ADC_Keywords: Infrared sources ; Galactic plane ; Surveys Keywords: Galaxy: structure - infrared: stars Abstract: We describe a deep multi-colour NIR survey (TCS-CAIN) that has been recently completed at the Instituto de Astrofisica de Canarias (Spain). The survey is of selected areas distributed along the Galactic plane and it goes deeper than 2MASS or DENIS. Its aim was to explore the large-scale structure of the Milky Way and the Galactic components, in particular the Galactic bar. This survey has about 10 million point-source detections in J, H, and Ks filters with a photometric accuracy of about 0.1mag in the three bands and a positional accuracy of about 0.2" (based on the 2MASS catalogue as the astrometric reference). Description: Point sources detections in J, H and K obtained along the TCS-CAIN survey in the 530 recorded Galactic fields. Individual magnitudes for each point source in the three bands, their coordinates (both equatorial and galactic ones), and cross-matching with 2MASS sources is provided in each catalogue file. Each file corresponds to a single field observed along the survey and it is named using the central galactic coordinates as reference (see Section 6 in the paper for details). At the beginning of each field astrometric transformation coefficients, photometric zero-points, extinction coefficients, and photometric uncertainties are enumerated (as they are obtained for each single catalogue field as a whole). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file files.dat 147 530 Main characteristics of the catalogue files and quality flags associated to them catal/* 127 530 *Catalogue files (530 individual files)
Note on catal/* : At the beginning of each file is described all the information concerning to the field as a whole (zero-points, astrometric coefficients, date, etc...). All this information is preceded by a "#" symbol for format convenience when reading the file.
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) B/denis : The DENIS database (DENIS Consortium, 2005) Byte-by-byte Description of file: files.dat
Bytes Format Units Label Explanations
1- 11 A11 --- File Catalogue filename, in "catal" subdirectory 13- 15 I3 deg GLON Central Galactic longitude of the field 17- 21 F5.1 deg GLAT Central Galactic latitude of the field 24- 30 F7.3 deg RAdeg Right Ascension J2000 33- 39 F7.3 deg DEdeg Right Ascension J2000 41- 48 A8 "DD/MM/YY" Date Date of observation 50- 55 F6.4 deg+2 Area Area in the sky covered by the field 57- 58 I2 --- Nfr Number of frames observed in the field 61- 65 I5 --- N Total number of detections 68- 72 I5 --- Nj Point sources detections in J filter 75- 79 I5 --- Nh Point sources detections in H filter 82- 86 I5 --- Nk Point sources detections in K filter 89- 93 I5 --- Njh Simultaneous detections in J and H bands 96-100 I5 --- Njk Simultaneous detections in J and K bands 103-107 I5 --- Nhk Simultaneous detections in H and K bands 109-110 I2 --- Qf Image quality flag (1) 112-113 I2 --- A1f Astrometric flag A (2) 116 I1 --- A2f Astrometric flag B (3) 119 I1 --- A3f Astrometric flag C (4) 121-123 I3 --- Pf Photometric flag (5) 125-131 F7.4 mag DJmag Mean J photometric difference (2MASS-TCS) 133-139 F7.4 mag DHmag Mean H photometric difference (2MASS-TCS) 141-147 F7.4 mag DKmag Mean K photometric difference (2MASS-TCS)
Note (1): This gives the number of frames which fall outside the quality criteria defined from the overall shape of the images in each available band ('0' means a high quality field). Note (2): This gives the number of frames with mean astrometric differences between 0.25" and 0.5" with respect to 2MASS either in RA or DE. Note (3): This gives the number of frames with mean astrometric differences larger than 0.5" with respect to 2MASS either in RA or DE. Note (4): This gives the number of frames with a pointing offset larger than 100" respect to the nominal pointing of the telescope. Note (5): This shows any significant mean photometric offset in the field with respect to 2MASS photometry. A symbol per filter in such a way as a '0' means no difference larger than 0.25mag. A '1' means an offset between 0.25 and 0.4mag in the corresponding filter and finally, a '2' means an extremely large offset (>0.4mag).
Byte-by-byte Description of file (# headlines): catal/*
Bytes Format Units Label Explanations
1- 4 A4 --- --- [cain] 5- 18 A14 --- ID Source identification: LLL+BBb-frNNNN (1) 21- 30 F10.6 deg RAdeg Right ascension (J2000.0) 33- 42 F10.6 deg DEdeg Declination (J2000.0) 45- 54 F10.6 deg GLON [0/360] Galactic longitude 57- 66 F10.6 deg GLAT Galactic latitude 69- 74 F6.2 pix xpos X position in the image frame (1) 77- 82 F6.2 pix ypos Y position in the image frame (1) 85- 90 F6.3 mag Jmag ?=99.999 J magnitude (3) 93- 98 F6.3 mag Hmag ?=99.999 H magnitude (3) 101-106 F6.3 mag Kmag ?=99.999 K magnitude (3) 108-109 I2 --- Nima Number of contributing overlapping images 112-127 A16 --- 2MASS Cross-number with 2MASS catalogue (II/246)
Note (1): Each frame is identified in the ID as the first two numbers of the last part of the name (e.g. cainLLL-BBb-11xxxx corresponds to the detections in the frame 11 of the field l=LLL b=-BB.b). See Section 6 in the paper for details. Note (3): Zero-points, extinction coefficients, and photometric errors are showed at the beginning of each file.
Acknowledgements: Antonio Cabrera-Lavers, antonio.cabrera(at)gtc.iac.es
(End) A.Cabrera-Lavers [IAC, Spain], Patricia Vannier [CDS] 27-Mar-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|