ACDS V10.0 - Tue Apr 23 06:35:25 CEST 2019
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Detailed Description of B/denis :
The DENIS database (DENIS Consortium, 2005)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
B/denis The DENIS database (DENIS Consortium, 2005)
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Third release of DENIS data (20 September 2005)
The DENIS consortium
<The DENIS consortium (2005)>
=2005yCat.2263....0T
================================================================================
ADC_Keywords: Infrared sources ; Photometry, infrared ; Surveys
Keywords: infrared: stars - Galaxy: stellar content -
stars: low-mass, brown dwarfs -
astronomical data bases: miscellaneous - surveys
Description:
This catalogue is the latest incremental release of the DENIS project.
It consists of a set of 355,220,325 point sources detected by the
DENIS survey in 3662 strips (covering each 30 degrees in declination
and 12 arcmin in right ascension). The data in this release cover
approximately 16700 square degrees of the Southern sky. Multiple
detections of single point sources have been merged in image overlaps
within individual strips, but sources can have multiple detections in
overlaping strips.
DENIS is the only astronomical survey of the Southern sky made in two
near-infrared bands (J at 1.25µm, and Ks at 2.15µm) and one
optical band (Gunn-i at 0.82µm), with limiting magnitudes 16.5, 14
and 18.5, respectively. Saturation magnitudes are Ks=6, J=7.5 and
Gunn-i=9.8mag. It was conducted by a European consortium, using the
1m telescope at ESO, La Silla (Chile).
The DENIS instrument is made up of a 3-channel camera built of
commercially available detector arrays by the Observatoire de Paris
and with major contributions from other European Institutes, notably:
the IAS in Frascati, the Observatoire de Grenoble, the University of
Innsbruck, the Observatoire de Lyon, and the IAC in Tenerife. The
survey is carried out by observing strips of 30° in declination
and 12arcminutes in Right Ascension with an overlap of 2 arcminutes
between consecutive strips. The survey started at the end of 1995 and
has been completed up to 97% in 2001. The data have been reduced at
the Institut d'Astrophysique de Paris and Observatoire de Paris. The
position of a general extracted point source is provided with an
accuracy better than 1arcsec and its magnitude to better than 0.1 mag.
The Centre de Donnees Astronomiques de Strasbourg (CDS) is releasing
the final databases and provides access of the processed and
calibrated data to the worldwide community.
The principal investigator of the DENIS project is N. Epchtein
(Observatoire de la Cote d'Azur); the Co-PI in charge of data
processing is G. Simon (observatoire de Paris); J. Borsenberger and
B. de Batz, with the help of F. Tanguy, S. Begon and P. Texier,
processed the data and implemented the working data base at PDAC;
S. Derriere is in charge of the data release at CDS. Scientists and
engineers from seven European countries and from Brazil are involved
in the data qualification and analysis.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . The present file
× denis.sam 479 1000 Sample of DENIS output
See also:
http://cdsweb.u-strasbg.fr/denis.html : DENIS documentation
A&A 349, 236 (1999) : Preliminary database of DENIS point sources
A&A 141, 313 (2000) : An Absolute Calibration of DENIS
J/A+AS/135/133 : First DENIS I-band extragalactic catalog (Vauglin+ 1999)
Nomenclature Notes:
The recommended way to designate the DENIS sources is JHHMMSS.s-DDMMSS
Byte-by-byte Description of file: denis.sam
Bytes Format Units Label Explanations
1- 16 A16 --- DENIS DENIS name, identifier
18- 24 I7 --- Image DENIS image number (1)
26- 30 I5 --- Strip DENIS strip number
32- 41 F10.6 deg RAdeg Right ascension (J2000)
43- 52 F10.6 deg DEdeg Declination (J2000)
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54- 59 F6.3 mag Imag ?Magnitude in I band from PSF fit
61- 65 F5.2 mag e_Imag ?Magnitude error in I band from PSF fit
67- 72 F6.3 mag Jmag ?Magnitude in J band from PSF fit
74- 78 F5.2 mag e_Jmag ?Magnitude error in J band from PSF fit
80- 85 F6.3 mag Kmag ?Magnitude in K band from PSF fit
87- 91 F5.2 mag e_Kmag ?Magnitude error in K band from PSF fit
93- 98 F6.3 mag Imag5.5 ?Magnitude in I band from 5.5'' aperture
100-104 F5.2 mag e_Imag5.5 ?Error in I band mag from 5.5'' aperture
106-111 F6.3 mag Jmag5.5 ?Magnitude in J band from 5.5'' aperture
113-117 F5.2 mag e_Jmag5.5 ?Error in J band mag from 5.5'' aperture
119-124 F6.3 mag Kmag5.5 ?Magnitude in K band from 5.5'' aperture
126-130 F5.2 mag e_Kmag5.5 ?Error in K band mag from 5.5'' aperture
132-137 F6.3 mag Imag4.5 ?Magnitude in I band from 4.5'' aperture
139-143 F5.2 mag e_Imag4.5 ?Error in I band mag from 4.5'' aperture
145-150 F6.3 mag Jmag4.5 ?Magnitude in J band from 4.5'' aperture
152-156 F5.2 mag e_Jmag4.5 ?Error in J band mag from 4.5'' aperture
158-163 F6.3 mag Kmag4.5 ?Magnitude in K band from 4.5'' aperture
165-169 F5.2 mag e_Kmag4.5 ?Error in K band mag from 4.5'' aperture
171-176 F6.3 mag Imag3.5 ?Magnitude in I band from 3.5'' aperture
178-182 F5.2 mag e_Imag3.5 ?Error in I band mag from 3.5'' aperture
184-189 F6.3 mag Jmag3.5 ?Magnitude in J band from 3.5'' aperture
191-195 F5.2 mag e_Jmag3.5 ?Error in J band mag from 3.5'' aperture
197-202 F6.3 mag Kmag3.5 ?Magnitude in K band from 3.5'' aperture
204-208 F5.2 mag e_Kmag3.5 ?Error in K band mag from 3.5'' aperture
210-215 F6.3 mag Imag3.5c ?I band Magnitude in 3.5'' corr. aperture
217-221 F5.2 mag e_Imag3.5c ?I band mag error in 3.5'' corr. aperture
223-228 F6.3 mag Jmag3.5c ?J band Magnitude in 3.5'' corr. aperture
230-234 F5.2 mag e_Jmag3.5c ?J band mag error in 3.5'' corr. aperture
236-241 F6.3 mag Kmag3.5c ?K band Magnitude in 3.5'' corr. aperture
243-247 F5.2 mag e_Kmag3.5c ?K band mag error in 3.5'' corr. aperture
249-254 F6.3 mag Imag2.5c ?I band Magnitude in 2.5'' corr. aperture
256-260 F5.2 mag e_Imag2.5c ?I band mag error in 2.5'' corr. aperture
262-267 F6.3 mag Jmag2.5c ?J band Magnitude in 2.5'' corr. aperture
269-273 F5.2 mag e_Jmag2.5c ?J band mag error in 2.5'' corr. aperture
275-280 F6.3 mag Kmag2.5c ?K band Magnitude in 2.5'' corr. aperture
282-286 F5.2 mag e_Kmag2.5c ?K band mag error in 2.5'' corr. aperture
288-293 F6.3 mag Imag1.5c ?I band Magnitude in 1.5'' corr. aperture
295-299 F5.2 mag e_Imag1.5c ?I band mag error in 1.5'' corr. aperture
301-306 F6.3 mag Jmag1.5c ?J band Magnitude in 1.5'' corr. aperture
308-312 F5.2 mag e_Jmag1.5c ?J band mag error in 1.5'' corr. aperture
314-319 F6.3 mag Kmag1.5c ?K band Magnitude in 1.5'' corr. aperture
321-325 F5.2 mag e_Kmag1.5c ?K band mag error in 1.5'' corr. aperture
--------------------------------------------------------------------------------
327-330 F4.1 mag Rmag ?R magnitude of USNOA2.0 nearest match
332-335 F4.1 mag Bmag ?B magnitude of USNOA2.0 nearest match
337-339 I3 --- q_Imag [0,100]?Quality flag for I band
341-343 I3 --- q_Jmag [0,100]?Quality flag for J band
345-347 I3 --- q_Kmag [0,100]?Quality flag for K band
349-351 I3 --- Ipsf [0,100]?Correlation to PSF for I band
353-355 I3 --- Jpsf [0,100]?Correlation to PSF for J band
357-359 I3 --- Kpsf [0,100]?Correlation to PSF for K band
361-364 F4.2 --- IMpsf [0,1]?Mean correlation to PSF in I band
366-369 F4.2 --- JMpsf [0,1]?Mean correlation to PSF in J band
371-374 F4.2 --- KMpsf [0,1]?Mean correlation to PSF in K band
376-380 F5.1 pix Ix ?Pixel x position in I band
382-386 F5.1 pix Iy ?Pixel y position in I band
388-392 F5.1 pix Jx ?Pixel x position in J band
394-398 F5.1 pix Jy ?Pixel y position in J band
400-404 F5.1 pix Kx ?Pixel x position in K band
406-410 F5.1 pix Ky ?Pixel y position in K band
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412-421 F10.6 deg A2RAdeg ?Right Ascension of USNOA2.0 nearest match
423-432 F10.6 deg A2DEdeg ?Declination of USNOA2.0 nearest match
434-441 F8.3 yr A2Ep ?Epoch of USNOA2.0 nearest match
443-447 I5 mas Dist ?Distance to USNOA2.0 nearest match
449-462 F14.6 d ObsJD Julian day for DENIS observation
464-467 I4 --- Iflg ?Image and source flag in I band (2)
469-472 I4 --- Jflg ?Image and source flag in J band (2)
474-477 I4 --- Kflg ?Image and source flag in K band (2)
479 I1 --- mult ?Multiplicity flag (3)
Note (1): the image number is incremented at each image taken during the
survey. In case a source results from the merging of two consecutive
overlapping images (N and N+1) in the same strip (Flag_mult set to 1,
see Note 3), the image number corresponds to the first image N.
Note (2): This flag is the concatenation of image and source flags, in
hexadecimal format.
For the image flag, the first two digits contain:
Bit 0 (0100) clouds during observation
Bit 1 (0200) electronic Read-Out problem
Bit 2 (0400) internal temperature problem
Bit 3 (0800) very bright star
Bit 4 (1000) bright star
Bit 5 (2000) stray light
Bit 6 (4000) unknown problem
For the source flag, the last two digits contain:
Bit 0 (0001) source might be a dust on mirror
Bit 1 (0002) source is a ghost detection of a bright star
Bit 2 (0004) source is saturated
Bit 3 (0008) source is multiple detect
Bit 4 (0010) reserved
Note (3): if set to 1, this flag indicates that the source was detected in
two consecutive images, and that the 2 measurements have been combined
Acknowledgements:
DENIS is the result of a joint effort involving human and financial
contributions of several Institutes mostly located in Europe. It has
been supported financially mainly by the French Institut National des
Sciences de l'Univers, CNRS, and French Education Ministry, the
European Southern Observatory, the State of Baden-Wuerttemberg, and
the European Commission under networks of the SCIENCE and Human
Capital and Mobility programs, the Landessternwarte, Heidelberg and
Institut d'Astrophysique de Paris.
References:
The DENIS Consortium (September 2005)
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(End) G.Simon,B.de Batz,J.Borsenberger [Obs.Paris], S.Derriere[CDS] 20-Sep-2005