J/AJ/162/94 Cataclysmic variables in ZTF 2nd year (Szkody+, 2021)
Cataclysmic variables in the second year of the Zwicky Transient Facility.
Szkody P., Olde Loohuis C., Koplitz B., Van Roestel J., Dicenzo B.,
Ho A.Y.Q., Hillenbrand L.A., Bellm E.C., Dekany R., Drake A.J., Duev D.A.,
Graham M.J., Kasliwal M.M., Mahabal A.A., Masci F.J., Neill J.D.,
Riddle R., Rusholme B., Sollerman J., Walters R.
<Astron. J., 162, 94-94 (2021)>
=2021AJ....162...94S 2021AJ....162...94S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable; Photometry, VRI; Parallaxes, trigonometric
Keywords: Sky surveys; Cataclysmic variable stars
Abstract:
Using a filter in the GROWTH Marshal based on color and the amplitude
and timescale of variability, we have identified 372 objects as known
or candidate cataclysmic variables (CVs) during the second year of the
operation of the Zwicky Transient Facility. From the available
difference imaging data, we found that 93 are previously confirmed CVs
and 279 are strong candidates. Spectra of four of the candidates
confirm them as CVs by the presence of Balmer emission lines, while
one of the four has prominent HeII lines indicative of containing a
magnetic white dwarf. Gaia EDR3 parallaxes are available for 154 of
these systems, resulting in distances from 108-2096pc and absolute
magnitudes in the range of 7.5-15.0, with the largest number of
candidates between 10.5 and 12.5. The total numbers are 21% higher
than from the previous year of the survey with a greater number of
distances available but a smaller percentage of systems close to the
Galactic plane. Comparison of these findings with a machine-learning
method of searching all the light curves reveals large differences in
each data set related to the parameters involved in the search
process.
Description:
The Zwicky Transient Facility (ZTF) is a three year photometric survey
that uses a wide 47deg2 field-of-view camera on the Palomar 48inch
telescope with g, r, i filters The second year of ZTF alert filtering
with the GROWTH Marshal has produced a list of 372 known and candidate
cataclysmic variables (CVs).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 93 Known confirmed catclysmic variables
table2.dat 110 279 Catclysmic variables candidates
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See also:
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/MNRAS/441/1186 : Cataclysmic variables from CRTS (Drake+, 2014)
J/AJ/159/198 : Cataclysmic variables in ZTF 1st-yr (2018-2019) (Szkody+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ZTF ZTF identifier
11- 12 I2 h RAh [0/23] Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 21 F5.2 s RAs Second of Right Ascension (J2000)
23 A1 --- DE- [±] Sign of the Declination (J2000)
24- 25 I2 deg DEd Degree of Declination (J2000)
27- 28 I2 arcmin DEm Arcminute of Declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000)
35- 39 F5.1 deg GLAT [-55.6/88.7] Galactic latitude
41- 44 F4.1 mag ABmax [11/18.2] Brightest observed AB magnitude (1)
46- 49 F4.1 mag ABmin [16.6/21] Faintest observed AB magnitude (1)
51- 54 F4.1 mag ABMAG [8.2/15]? Absolute AB magnitude (1)
56- 59 F4.2 mas plx [0.48/9.23]? Gaia DR2 parallax
61- 64 F4.2 mas e_plx [0.02/0.5]? Uncertainty in plx
66- 69 I4 pc Dist [108/2096]? Distance
71- 76 A6 --- Nout Number of outbursts (2)
77- 79 I3 --- Days [31/367] Days covered by ZTF
81 A1 --- SDSS Observed by SDSS (Y=Yes; 56 occurrences)
83 A1 --- CRTS Observed by CRTS (Y=Yes; 42 occurrences)
85- 86 A2 --- Spec Available spectra (3)
88-112 A25 --- survey Identifier and other surveys (3)
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Note (1): The photometry was primarily obtained in the g band with some r band
observations but (g-r) is not too different for CVs.
Note (2): Precision as follows:
SOB = superoutburst (14 occurrences)
Note (3): Spectra as follows:
SD = SDSS
MOT = MASTEROT
G = Gaia
Gx = GALEX
2M = 2MASS
K = Keck
SP = SPRAT
F = Floyds
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- ZTF ZTF identifier
11- 12 I2 h RAh [0/23] Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 21 F5.2 s RAs Second of Right Ascension (J2000)
23 A1 --- DE- [±] Sign of the Declination (J2000)
24- 25 I2 deg DEd Degree of Declination (J2000)
27- 28 I2 arcmin DEm Arcminute of Declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000)
35- 39 F5.1 deg GLAT [-71/87] Galactic latitude
41- 44 F4.1 mag ABmax [12.9/19.6] Brightest observed AB magnitude (1)
46- 49 F4.1 mag ABmin [16.6/21] Faintest observed AB magnitude (1)
51- 54 F4.1 mag ABMAG [7.3/15]? Absolute AB magnitude (1)
56- 59 F4.2 mas plx [0.36/6.22]? Gaia DR2 parallax
61- 64 F4.2 mas e_plx [0.01/2]? Uncertainty in parallax
66- 69 I4 pc Dist [161/2755]? Distance
71- 76 A6 --- Nout Number of outbursts (2)
77- 79 I3 --- Days [4/366] Days covered by ZTF
81 A1 --- SDSS Observed by SDSS (Y=Yes; 81 occurrences)
83 A1 --- CRTS Observed by CRTS (Y=Yes; 98 occurrences)
85- 86 A2 --- Spec Available spectra (3)
88-110 A23 --- survey Identifier and other surveys (3)
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Note (1): The photometry was primarily obtained in the g band with some r band
observations but (g-r) is not too different for CVs.
Note (2): Precision as follows:
SOB = superoutburst (87 occurrences)
Note (3): Spectra as follows:
SD = SDSS
MOT = MASTEROT
G = Gaia
Gx = GALEX
2M = 2MASS
K = Keck
SP = SPRAT
F = Floyds
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History:
From electronic version of the journal
References:
Szkody et al. Paper I : 2020AJ....159..198S 2020AJ....159..198S Cat. J/AJ/159/198
(End) Prepared by [AAS], Coralie Fix [CDS], 29-Nov-2021