B/denis The DENIS database (DENIS Consortium, 2005)
Third release of DENIS data (20 September 2005)
DENIS consortium
<The DENIS consortium (2005)>
=2005yCat.2263....0D 2005yCat.2263....0D
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
--------------------------------------------------------------------------------
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 output: denis.sam
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- DENIS DENIS name, identifier
18- 27 F10.6 deg RAdeg Right ascension (J2000)
29- 38 F10.6 deg DEdeg Declination (J2000)
40- 46 I7 --- Image DENIS image number (1)
48- 52 I5 --- Strip DENIS strip number
54- 59 F6.3 mag Imag ?Magnitude in I band from PSF fit
61- 64 F4.2 mag e_Imag ?Magnitude error in I band from PSF fit
66- 71 F6.3 mag Jmag ?Magnitude in J band from PSF fit
73- 76 F4.2 mag e_Jmag ?Magnitude error in J band from PSF fit
78- 83 F6.3 mag Kmag ?Magnitude in K band from PSF fit
85- 88 F4.2 mag e_Kmag ?Magnitude error in K band from PSF fit
90- 95 F6.3 mag Imag5.5 ?Magnitude in I band from 5.5'' aperture
97-100 F4.2 mag e_Imag5.5 ?Error in I band mag from 5.5'' aperture
102-107 F6.3 mag Jmag5.5 ?Magnitude in J band from 5.5'' aperture
109-112 F4.2 mag e_Jmag5.5 ?Error in J band mag from 5.5'' aperture
114-119 F6.3 mag Kmag5.5 ?Magnitude in K band from 5.5'' aperture
121-124 F4.2 mag e_Kmag5.5 ?Error in K band mag from 5.5'' aperture
126-131 F6.3 mag Imag4.5 ?Magnitude in I band from 4.5'' aperture
133-136 F4.2 mag e_Imag4.5 ?Error in I band mag from 4.5'' aperture
138-143 F6.3 mag Jmag4.5 ?Magnitude in J band from 4.5'' aperture
145-148 F4.2 mag e_Jmag4.5 ?Error in J band mag from 4.5'' aperture
150-155 F6.3 mag Kmag4.5 ?Magnitude in K band from 4.5'' aperture
157-160 F4.2 mag e_Kmag4.5 ?Error in K band mag from 4.5'' aperture
162-167 F6.3 mag Imag3.5 ?Magnitude in I band from 3.5'' aperture
169-172 F4.2 mag e_Imag3.5 ?Error in I band mag from 3.5'' aperture
174-179 F6.3 mag Jmag3.5 ?Magnitude in J band from 3.5'' aperture
181-184 F4.2 mag e_Jmag3.5 ?Error in J band mag from 3.5'' aperture
186-191 F6.3 mag Kmag3.5 ?Magnitude in K band from 3.5'' aperture
193-196 F4.2 mag e_Kmag3.5 ?Error in K band mag from 3.5'' aperture
198-203 F6.3 mag Imag3.5c ?I band Magnitude in 3.5'' corr. aperture
205-208 F4.2 mag e_Imag3.5c ?I band mag error in 3.5'' corr. aperture
210-215 F6.3 mag Jmag3.5c ?J band Magnitude in 3.5'' corr. aperture
217-220 F4.2 mag e_Jmag3.5c ?J band mag error in 3.5'' corr. aperture
222-227 F6.3 mag Kmag3.5c ?K band Magnitude in 3.5'' corr. aperture
229-232 F4.2 mag e_Kmag3.5c ?K band mag error in 3.5'' corr. aperture
234-239 F6.3 mag Imag2.5c ?I band Magnitude in 2.5'' corr. aperture
241-244 F4.2 mag e_Imag2.5c ?I band mag error in 2.5'' corr. aperture
246-251 F6.3 mag Jmag2.5c ?J band Magnitude in 2.5'' corr. aperture
253-256 F4.2 mag e_Jmag2.5c ?J band mag error in 2.5'' corr. aperture
258-263 F6.3 mag Kmag2.5c ?K band Magnitude in 2.5'' corr. aperture
265-268 F4.2 mag e_Kmag2.5c ?K band mag error in 2.5'' corr. aperture
270-275 F6.3 mag Imag1.5c ?I band Magnitude in 1.5'' corr. aperture
277-280 F4.2 mag e_Imag1.5c ?I band mag error in 1.5'' corr. aperture
282-287 F6.3 mag Jmag1.5c ?J band Magnitude in 1.5'' corr. aperture
289-292 F4.2 mag e_Jmag1.5c ?J band mag error in 1.5'' corr. aperture
294-299 F6.3 mag Kmag1.5c ?K band Magnitude in 1.5'' corr. aperture
301-304 F4.2 mag e_Kmag1.5c ?K band mag error in 1.5'' corr. aperture
306-309 F4.1 mag Rmag ?R magnitude of USNOA2.0 nearest match
311-314 F4.1 mag Bmag ?B magnitude of USNOA2.0 nearest match
316-318 I3 --- q_Imag [0,100]?Quality flag for I band
320-322 I3 --- q_Jmag [0,100]?Quality flag for J band
324-326 I3 --- q_Kmag [0,100]?Quality flag for K band
328-329 I2 --- Ipsf [0,100]?Correlation to PSF for I band
331-332 I2 --- Jpsf [0,100]?Correlation to PSF for J band
334-335 I2 --- Kpsf [0,100]?Correlation to PSF for K band
337-340 F4.2 --- IMpsf [0,1]?Mean correlation to PSF in I band
342-345 F4.2 --- JMpsf [0,1]?Mean correlation to PSF in J band
347-350 F4.2 --- KMpsf [0,1]?Mean correlation to PSF in K band
352-356 F5.1 pix Ix ?Pixel x position in I band
358-362 F5.1 pix Iy ?Pixel y position in I band
364-368 F5.1 pix Jx ?Pixel x position in J band
370-374 F5.1 pix Jy ?Pixel y position in J band
376-380 F5.1 pix Kx ?Pixel x position in K band
382-386 F5.1 pix Ky ?Pixel y position in K band
388-397 F10.6 deg A2RAdeg ?Right Ascension of USNOA2.0 nearest match
399-408 F10.6 deg A2DEdeg ?Declination of USNOA2.0 nearest match
410-417 F8.3 yr A2Ep ?Epoch of USNOA2.0 nearest match
419-422 I4 mas Dist ?Distance to USNOA2.0 nearest match
424-437 F14.6 d ObsJD Julian day for DENIS observation
439-442 I4 --- Iflg ?Image and source flag in I band (2)
444-447 A4 --- Jflg ?Image and source flag in J band (2)
449-452 A4 --- Kflg ?Image and source flag in K band (2)
454-454 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)
History:
* 2026-Mar-16:
(End) G.Simon,B.de Batz,J.Borsenberger [Obs.Paris], S.Derriere[CDS] 20-Sep-2005