II/228A DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000)
The DENIS Point Source Catalogue towards the Magellanic Clouds Cioni M.-R., Loup C., Habing H.J., Fouque P., Bertin E., Deul E., Egret D., Alard C., de Batz B., Borsenberger J., Dennefeld M., Epchtein N., Forveille T., Garzon F., Hron J., Kimeswenger S., Lacombe F., Le Bertre T., Mamon G.A., Omont A., Paturel G., Persi P., Robin A., Rouan D., Simon G., Tiphene D., Vauglin I., Wagner S. <Astron. Astrophys. Suppl. Ser., 144, 235 (2000)> =2000A&AS..144..235C
ADC_Keywords: Photometry, infrared ; Surveys ; Magellanic Clouds Keywords: Catalogs - Surveys - Galaxies: Magellanic Clouds - Galaxies: photometry - Galaxies: stellar content - Infrared: stars Description: This is the first version of a complete near-IR point source catalogue towards the Magellanic Clouds extracted from the data obtained with the DEep Near Infraread Survey of the Southern Sky (DENIS). The catalogue covers an area of 19.87x16 square degrees centered on (05:27:20-69:00:00) for the Large Magellanic Cloud (LMC), and 14.7x10 square degrees centered on (01:02:40-73:00:00) for the Small Magellanic Cloud (SMC). It contains the sources detected in at least 2 of the 3 photometric bands I (Gunn-i centered at 0.8µm), J (centered at 1.25µm), and Ks (centered at 2.15µm). The spatial resolution is 1" in I and 3" in the J and K bands, and the limiting magnitudes are I=18, J=16 and Ks=14. 70% of the detected sources are real members of the Magellanic Clouds, and consist mainly of red giants, asymptotic giant branch stars and supergiants. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file lmc_ijk.dat 210 264347 LMC stars observed in the 3 bands I, J and K (1) lmc_ij.dat 210 1045630 LMC stars observed in I and J bands (1) lmc_ik.dat 210 8234 LMC stars observed in I and K bands (1) lmc_jk.dat 210 1689 LMC stars observed in J and K bands (1) smc_ijk.dat 210 69829 SMC stars observed in the 3 bands I, J and K (1) smc_ij.dat 210 242837 SMC stars observed in I and J bands (1) smc_ik.dat 210 2302 SMC stars observed in I and K bands (1) smc_jk.dat 210 812 SMC stars observed in J and K bands (1) qual.dat 68 187 Qualities of observation strips (table 8)
Note (1): table 7 of the paper
See also: http://cdsweb.u-strasbg.fr/denis.html : the DENIS home page B/denis : The DENIS database (Epchtein+, 1999) Byte-by-byte Description of file: lmc*.dat smc*.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [DCMC] Catalog Acronym 6- 24 A19 --- DCMC Name of the source (based on J2000 position) 27- 28 I2 h RAh Right Ascension J2000 (hours) 29 A1 --- --- [:] 30- 31 I2 min RAm Right Ascension J2000 (minutes) 32 A1 --- --- [:] 33- 37 F5.2 s RAs Right Ascension J2000 (seconds) 39 A1 --- DE- Declination J2000 (sign) 40- 41 I2 deg DEd Declination J2000 (degrees) 42 A1 --- --- [:] 43- 44 I2 arcmin DEm Declination J2000 (minutes) 45 A1 --- --- [:] 46- 49 F4.1 arcsec DEs Declination J2000 (seconds) 51- 54 F4.2 arcsec PosErr Systematic positional error 56- 62 F7.3 pix Ixpos Object position along x-axis in I image 64- 70 F7.3 pix Iypos Object position along y-axis in I image 72- 74 I3 --- Ifield ?=999 Field number of I image 76- 79 I4 --- Istrip ?=0 Strip number of I image (in field Ifield) 81- 86 F6.3 mag Imag ?=99.0 Magnitude derived within 7" diameter 88- 93 F6.3 mag e_Imag ?=99.0 Mean error in Imag (1) 95- 97 I3 --- f_Imag [0,7] Extraction flags (2) 99-101 I3 --- n_Imag [0,63] Image flags in I band (3) 103-109 F7.3 pix Jxpos Object position along x-axis in J image 111-117 F7.3 pix Jypos Object position along y-axis in J image 119-121 I3 --- Jfield ?=999 Field number of J image 123-126 I4 --- Jstrip ?=0 Strip number of J image (in field Jfield) 128-133 F6.3 mag Jmag ?=99.00 Magnitude derived within 7" diameter 135-140 F6.3 mag e_Jmag ?=99.00 Mean error in Jmag (1) 142-144 I3 --- f_Jmag [0,7] Extraction flags (2) 146-148 I3 --- n_Jmag [0,127] Image flags in J band (3) 150-156 F7.3 pix Kxpos Object position along x-axis in K image 158-164 F7.3 pix Kypos Object position along y-axis in K image 166-168 I3 --- Kfield ?=999 Field number of K image 170-173 I4 --- Kstrip ?=0 Strip number of K image (in field Kfield) 175-180 F6.3 mag Kmag ?=99.00 Magnitude derived within 7" diameter 182-187 F6.3 mag e_Kmag ?=99.00 Mean error in Kmag (1) 189-191 I3 --- f_Kmag [0,7] Extraction flags (2) 193-195 I3 --- n_Kmag [0,127] Image flags in J band (3) 198-202 F5.2 mag Bmag ?=99. Blue magnitude from USNO-A2.0 I/252 206-210 F5.2 mag Rmag ?=99. Red magnitude from USNO-A2.0 I/252
Note (1): mean errors are derived from the photon statistics within the aperture Note (2): the extractions flags are the summation of the following exclusive numbers: 1 = Bright neighbours or bad pixels (more than 10 of the integrated area affected) 2 = The object was originally blended with another 4 = At least one pixel of the object is saturated Some of the very bright sources with the highest extraction flag values may suffer from large (>10arcsec) astrometric shift. Note (3): the image flags are: 1 = Regression failed for this pixel 2 = Flat derived is less than 0.01 (dead pixels) 3 = Abnormally high flat 4 = Abnormally high residual after adjustment (5σ) 5 = Bias more than 5σ of mean 6 = Flat more than 5σ of mean 9 = Insufficient number of pixels left after iterative clipping 16 = Flat < 0.7 and/or flux < -200 ADU 32 = Flat > 1.3 and/or flux > 49500 ADU
Byte-by-byte Description of file: qual.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Strip Strip number 6- 13 A8 "DD/MM/YY" Date Date of observation 18- 22 F5.2 mag Izp Zero point in I band 24- 27 F4.2 mag e_Izp Standard error on Izp 30- 34 F5.2 mag Jzp Zero point in J band 36- 39 F4.2 mag e_Jzp Standard error on Jzp 42- 46 F5.2 mag Kzp Zero point in K band 48- 51 F4.2 mag e_Kzp Standard error on Kzp 54- 68 A15 --- Notes Value of the photometric shift, and/or default zero point assumed when "ZP_Idef"
Acknowledgements: It is a pleasure to thank Maria-Rosa Cioni and Cecile Loup who supplied the data in advance of publication. History: * 11-Apr-2000: First release, which did not contain the magnitudes for the strips numbered 0 (concerns 9930 stars in file lmc_ijk.dat) * 20-Jun-2000: the strip numbers (Istrip, Jstrip and Kstrip) were set to 999 when unknown (instead of 0); the magnitude values for the strips numbered zero, previsouly set to 99.00, were re-entered correctly in file lmc_ijk.dat.
(End) Francois Ochsenbein [CDS] 20-Jun-2000
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