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J/ApJ/565/511 Cataclysmic variables in the 2MASS 2IDR (Hoard+, 2002)
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Infrared properties of cataclysmic variables in the 2 micron All-Sky Survey
Second Incremental Data Release.
Hoard D.W., Wachter S., Clark L.L., Bowers T.P.
<Astrophys. J. 565, 511 (2002)>
=2002ApJ...565..511H (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, variable ; Novae ; Binaries, cataclysmic ;
Photometry, infrared
Keywords: accretion, accretion disks - infrared: stars -
novae, cataclysmic variables - stars: dwarf novae -
stars: fundamental parameters - surveys
Abstract:
Cataclysmic variables (CVs) have "traditionally" been observed
primarily at short wavelengths because accretion-generated luminosity,
which peaks in the optical-ultraviolet, dominates the radiated energy
of most systems. Hence, relatively little is known about their
infrared (IR) properties. Investigating CVs in the IR will contribute
to the understanding of key system components that are expected to
radiate at these wavelengths, such as the cool outer disk, accretion
stream, and secondary star. We have compiled the near-IR J, H, and Ks
band photometry of all cataclysmic variables contained in the sky
coverage of the Second Incremental Data Release of the 2 Micron All
Sky Survey (2MASS). This data comprises 251 cataclysmic variables with
reliably identified near-IR counterparts and S/N>10 photometry in one
or more of the three near-IR bands. In addition to tables containing
the 2MASS data, we present a set of near-IR finding charts for
selected systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 251 CVs in the 2MASS 2nd Incremental Data Release
table2.dat 32 152 Undetected CVs in the 2MASS 2nd Incremental
Data Release
table3.dat 46 118 Problematic CVs in the 2MASS 2nd Incremental
Data Release
notes.dat 78 230 Individual notes
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See also:
B/2mass : The 2MASS database (IPAC/UMass, 2000)
V/110 : Catalog of Cataclysmic Variables (Downes+ 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Downes et al. (2001, Cat. <V/110>) cataclysmic
variable name
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 20 F4.1 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of the Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of Declination (J2000)
32- 35 F4.2 arcsec Offset ? Optical CV and near-IR counterpart offset (1)
37- 43 A7 --- Type Downes et al. (2001, Cat. <V/110>) CV
classification type (2)
45- 52 F8.6 d Porb ? Orbital period (3)
54 A1 --- l_Jmag Indicates 95% confidence upper limit on Jmag
55- 60 F6.3 mag Jmag ? The 2MASS J band magnitude
62- 66 F5.3 mag e_Jmag ? The 1{sigma} uncertainty in Jmag
68 A1 --- l_Hmag Indicates 95% confidence upper limit on Hmag
69- 74 F6.3 mag Hmag ? The 2MASS H band magnitude
76- 80 F5.3 mag e_Hmag ? The 1{sigma} uncertainty in Hmag
82 A1 --- l_Ksmag Indicates 95% confidence upper limit on Ksmag
83- 88 F6.3 mag Ksmag ? The 2MASS K_s_ band magnitude
90- 94 F5.3 mag e_Ksmag ? The 1{sigma} uncertainty in Ksmag
96-114 A19 --- n_Name Short notes on Name (4)
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Note (1): The astrometric accuracy of the 2MASS PSC is better than 0.2arcseconds
Note (2): We have defined each of these sub-type categories to include the
following classification codes given in Downes et al.
(2001, Cat. <V/110>):
dwarf novae = ug, ugz, ugss, ugsu, ugwz
novalikes = nl, ux, vy
classical novae = n, na, nb, nc
recurrent novae = nr, nra, nrb
magnetic CVs = am, dq
The uncertain/unclassified systems include the general classification
code of "cv" as well as any targets with uncertain classification
(denoted with ":" or "?") and/or conflicting classifications
(e.g., "ug/vy"). In a few cases, to avoid "recounting" the same
targets, we chose between multiple (but compatible) classifications.
Note (3): Orbital periods inferred from the superhump period relation of
Stolz & Schoembs (1984A&A...132..187S) are listed here, but periods
described by Downes et al. (2001, Cat. <V/110>) as
"uncertain/unreliable" are not listed.
Note (4): An asterisk indicates that additional information about the CV is
given in notes.dat file.
The data quality flags are
rd: read flag, describing the photometry method,
bl: blend flag, describing the number of profiles fit during the
photometry
cc: contamination flag, describing various photometry problems.
Each flag is followed by a three digit code giving the flag values
for the Jmag, Hmag, and Kmag columns, respectively.
Acceptable values for rd are
0: source not detected, 95% confidence upper limit magnitude is given
1: aperture photometry magnitude
2: profile-fitting magnitude
all other values indicate unusable data.
Acceptable values for bl are
0: source not detected, corresponding to rd=0)
1: single profile fit to isolated source
values >1 indicate multiple sources detected in a small region.
Acceptable values for cc are
0: not contaminated or not detected
all other values indicate contaminated data (e.g., P, D, and S
indicate different contamination artifacts caused by a nearby bright
star, C indicates confusion with a nearby source, B indicates
confusion during merging of the J, H, and K_s_ band data sets).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cataclysmic variable name from Downes et al.
(2001, Cat. <V/110>)
11 A1 --- n_Name [a] Indicates additional comments available
in notes.dat file
13- 14 I2 h RAh Hour of Right Ascension (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 22 F4.1 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 32 I2 arcsec DEs Arcsecond of Declination (J2000)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Downes et al. (2001, Cat. <V/110>) cataclysmic
variable name
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 20 F4.1 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of the Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of Declination (J2000)
32- 46 A15 --- n_Name Notes on Name (1)
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Note (1): Notes:
* = Additional information about the CV is given in notes.dat file
Uncertain ID = A CV for which there is insufficient or imprecise information
pertaining to its optical position and/or identification that
precludes identification of the near-IR counterpart.
Cluster = A CV located in a star cluster that is too crowded to obtain
2MASS photometry. The cluster's NGC catalog number is given.
Artifact = A CV located in the exclusion region defined around diffraction
spikes of nearby bright stars.
Crowded = The near-IR field around the CV is more crowded than the
optical field, and conclusive identification of the CV's
near-IR counterpart is not possible.
Blended = The near-IR counterpart of the CV is blended with one or more
additional near-IR sources in the 2MASS images.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 80 A70 --- Note Text of the note
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History:
From electronic version of the journal
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 22-Mar-2002