J/AJ/159/198 Cataclysmic variables in the ZTF 1st-yr (2018-2019) (Szkody+, 2020)
Cataclysmic variables in the first year of the Zwicky Transient Facility.
Szkody P., Dicenzo B., Ho A.Y.Q., Hillenbrand L.A., van Roestel J.,
Ridder M., DeJesus Lima I., Graham M.L., Bellm E.C., Burdge K., Kupfer T.,
Prince T.A., Masci F.J., Mroz P.J., Golkhou V.Z., Coughlin M.,
Cunningham V.A., Dekany R., Graham M.J., Hale D., Kaplan D., Kasliwal M.M.,
Miller A.A., Neill J.D., Patterson M.T., Riddle R., Smith R., Soumagnac M.T.
<Astron. J., 159, 198 (2020)>
=2020AJ....159..198S 2020AJ....159..198S
ADC_Keywords: Stars, variable; Binaries, cataclysmic; Spectra, optical;
Parallaxes, trigonometric; Photometry; Surveys
Keywords: Astronomical object identification ; Compact binary stars ;
Spectroscopy ; Dwarf novae
Abstract:
Using selection criteria based on amplitude, time, and color, we have
identified 329 objects as known or candidate cataclysmic variables
(CVs) during the first year of testing and operation of the Zwicky
Transient Facility. Of these, 90 are previously confirmed CVs, 218 are
strong candidates based on the shape and color of their light curves
obtained during 3-562days of observation, and the remaining 21 are
possible CVs but with too few data points to be listed as good
candidates. Almost half of the strong candidates are within 10° of
the galactic plane, in contrast to most other large surveys that have
avoided crowded fields. The available Gaia parallaxes are consistent
with sampling the low mass transfer CVs, as predicted by population
models. Our follow-up spectra have confirmed Balmer/helium emission
lines in 27 objects, with four showing high-excitation HeII emission,
including candidates for an AM CVn, a polar, and an intermediate
polar. Our results demonstrate that a complete survey of the Galactic
plane is needed to accomplish an accurate determination of the number
of CVs existing in the Milky Way.
Description:
The Zwicky Transient Facility (ZTF) is a northern all-sky survey that
uses the Palomar 48 inch telescope equipped with a 47deg2
field-of-view camera (Bellm+, 2019PASP..131a8002B 2019PASP..131a8002B).
The available sky is sampled in ZTF g or r filters every three nights
and the available Galactic plane with |b|≤7° every night in both
g and r with mean 5σ limiting magnitudes of 21 and saturation
near 15mag. Alerts on all variable objects are available every night.
The 3yr survey officially started on 2018 March 18 and the first
public data release DR1 occurred on 2019 May 8.
Follow-up spectra on some objects were obtained using several
telescopes, sometimes with multiple spectra on the same object.
Low-resolution spectrographs were used on the Palomar 60-inch, the
Palomar 200-inch, the Keck 10m and the Liverpool 2m telescope.
A few spectra were obtained at medium resolution with the William
Herschel 4.2m telescope (WHT).
The Apache Point Observatory (APO) 3.5m data were obtained with the
Double Imaging Spectrograph using either low-resolution (2Å) or
high-resolution (0.6Å) gratings; most of the data collected were
between 5500-9000Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 115 90 Known confirmed cataclysmic variables (CVs)
table2.dat 115 218 The Zwicky Transient Facility (ZTF) strong
CV candidates
table3.dat 102 21 The Zwicky Transient Facility (ZTF) possible
CV candidates
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See also:
B/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2004)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)
V/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJS/117/319 : Northern RASS X-ray sources catalog (Appenzeller+ 1998)
J/ApJ/565/511 : Cataclysmic variables in the 2MASS 2IDR (Hoard+, 2002)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)
J/AJ/144/81 : Spectro. & photometry of CV candidates (Thorstensen+, 2012)
J/PASJ/64/63 : Dwarf novae characterization using SDSS (Kato+, 2012)
J/MNRAS/426/1235 : UVEX sources spectroscopic follow-up (Verbeek+, 2012)
J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)
J/MNRAS/441/1186 : Cataclysmic variables from CRTS (Drake+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)
J/AcA/65/313 : 1000 new dwarf novae from the OGLE Survey (Mroz+, 2015)
J/MNRAS/456/4441 : Outburst cat. of cataclysmic variables (Coppejans+, 2016)
J/AJ/153/144 : Spectroscopy of mCVs & variable objects (Oliveira+, 2017)
J/MNRAS/465/4968 : Cataclysmic variables observations (Hardy+, 2017)
J/other/RAA/18.68 : Cataclysmic variables from LAMOST DR3 (Han+, 2018)
J/AJ/159/114 : Magnetic CVs spectra & variable objects II (Oliveira+,2020)
J/AJ/159/43 : Spectro. identified CVs from LAMOST survey. I. (Hou+, 2020)
http://www.ztf.caltech.edu/ : ZTF website homepage
Byte-by-byte Description of file: table[123].dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ZTF ZTF identifier (YYaaaaaaa)
11- 12 I2 h RAh 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- 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 [-48.4/88.1] Galactic latitude
41- 46 F6.1 mag High [11.3/19.5] Brightest observed magnitude
48- 51 F4.1 mag Low [15.5/24] Faintest observed magnitude
53- 57 F5.2 mas plx [0.25/11.4]? Gaia DR2 (I/345) parallax
59- 62 F4.2 mas e_plx [0.02/0.6]? Uncertainty in parallax
64- 69 A6 --- Nout Number of normal outbursts
(SOB = superoutburst) (1)
71- 73 I3 d Days [3/562] Interval of actual coverage by ZTF
in days up to 2019 May 8
75- 76 A2 --- SDSS [Y ]? Source is in the Sloan Digital Sky Survey
(SDSS) footprint
78- 80 A3 --- CRTS ? Outbursts observed by the Catalina Real-time
Transient Survey (CRTS)
82- 87 A6 --- Spec ? Available spectra (2)
89-115 A27 --- Other Identifier and other surveys (3)
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Note (1): Number of normal outbursts and longer superoutbursts (SOBs) observed
in the Marshal (Kasliwal+ 2019PASP..131c8003K 2019PASP..131c8003K) light curves.
Note (2): Source of spectra as follows:
AP = The Apache Point Observatory (APO) 3.5m telescope with
the Double Imaging Spectrograph (DIS)
K = Keck 10m with the Low Resolution Imaging Spectrometer (LRIS)
P = Palomar 200-inch Hale Telescope with the Double Beam Spectrograph (DBS)
SD = Sloan Digital Sky Survey (SDSS)
SM = Palomar 60-inch telescope with the Spectral Energy Distribution Machine
(SEDM), a low-resolution integral field spectrograph
SP = The Liverpool 2m telescope with the Spectrograph for the Rapid
Acquisition of Transients (SPRAT)
W = The William Herschel 4.2m telescope (WHT) with the Auxiliary-port
CAMera (ACAM) spectrograph
Note (3): Abbreviation of surveys:
MOT = Mobile Astronomical System of TElescopic Robots (MASTEROT;
Lipunov+, 2010AdAst2010E..30L 2010AdAst2010E..30L
G = Gaia (see Gaia DR2, I/345)
Gx = Galaxy Evolution Explorer (GALEX; see Bianchi+, 2017, II/335)
KIC = Kepler; see the Kepler Input Catalog (V/133)
K = Kato T. superhumps (SH) papers (e.g. 2017, J/PASJ/69/75)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 28-May-2020