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DNCVOBCAT - Outburst Catalog of Dwarf Novae-type and Other Cataclysmic Variables

HEASARC
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Overview

This outburst catalog contains a wide variety of observational properties for 722 dwarf nova-type (DN) cataclysmic variables (CVs) and 309 CVs of other types from the Catalina Real-time Transient Survey (CRTS). In particular, it includes the apparent outburst and quiescent V-band magnitudes, duty cycles, limits on the recurrence time, upper- and lower-limits on the distance and absolute quiescent magnitudes, color information, orbital parameters, and X-ray counterparts. These properties were determined by means of a classification script presented in the reference paper. The DNs in the catalog show a correlation between the outburst duty cycle and the orbital period (and outburst recurrence time), as well as between the quiescent absolute magnitude and the orbital period (and duty cycle). This is the largest sample of dwarf nova properties collected to date (2016). Besides serving as a useful reference for individual systems and a means of selecting objects for targeted studies, it will prove valuable for statistical studies that aim to shed light on the formation and evolution of cataclysmic variables.

The CRTS identifies transients in the data from the Catalina Sky Survey (Larson et al. 1998, BAAS, 30, 1037; 2003, BAAS, 35, 982), a photometric survey that searches for Potentially Hazardous Asteroids and Near Earth Objects. Three sub-surveys constitute the Catalina Sky Survey, namely the original CSS (Catalina Schmidt Survey), the MLS (Mt Lemmon Survey) based in Arizona, and the SSS (Siding Spring Survey) in Australia, which ended on 2014 July 5. The field of view and typical limiting magnitude for each survey (at ~30 s integrations) are 8.2 degrees and V~19.5 mag for the CSS, 1.1 degrees and V~21.5 mag for the MLS, and 4 degrees and V~19 mag for the SSS. Together, these surveys cover 30, 000 deg2 between -70 and +70 degrees Declination (see Drake et al. 2014, MNRAS, 441, 1186 for more details). The entire zone within 15 Degrees of the Galactic Plane is avoided due to overcrowding, as are the Magellanic Clouds.

The properties of the cataclysmic variables in this catalog are derived from the long-term optical light curves from the CRTS, as well as magnitudes, fluxes and orbital parameters from the SDSS, 2MASS, UKIDSS, ROSAT, Chandra, XMM and WISE catalogs, and from the Catalog of Cataclysmic Binaries, Low-Mass X-Ray Binaries and Related Objects (RKCat: Ritter and Kolb 2003, A&A, 404, 301, available at the HEASARC as the RITTERCV, RITTERLMXB and RITTERRBIN tables).


Catalog Bibcode

2016MNRAS.456.4441C

References

Statistical properties of dwarf novae-type cataclysmic variables:
The Outburst Catalogue.
     Coppejans D.L., Koerding E.G., Knigge C., Pretorius M.L., Woudt P.A.,
     Groot P.J., Van Eck C.L., Drake A.J.
    <Mon. Not. R. Astron. Soc. 456, 4441 (2016)>
    =2016MNRAS.456.4441C        (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in October 2017 based on the CDS catalog J/MNRAS/456/4441 file catalog.dat. .

HEASARC Implementation

Both the original CDS table and this HEASARC table from which it is derived have, 1,038 entries, 7 more than the 1,031 entries specified in the reference paper and the Overview above (derived in part from the abstract of this paper). This is because the authors included 7 known AM CVn-type systems in this table in addition to the 1,031 other CVs, as noted at the end of Section 4 of the reference paper. From that point in the paper, these 7 known AM CVns were excluded from the subsequent analyses, "as these systems have a different evolutionary path and outburst characteristics to CVs (e.g. Levitan et al. 2015, MNRAS, 446, 391)".

Parameters

Name
The Catalina Real-time Transient Survey (CRTS) source designation based on its J2000.0 position, viz., 'CRTS JHHMMSS.S+DDMMSS'.

Alt_Names
Other commonly used identifiers for the CV.

RA
The Right Ascension of the CV in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.

Dec
The Declination of the CV in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.

LII
The Galactic Longitude of the CV.

BII
The Galactic Latitude of the CV.

CRTS_Subsurvey
The CRTS sub-survey(s) in which the CV was detected, viz., CSS, MLS, and/or SSS (see Overview above for more details).

Source_Type
The classification of the CV as determined by the authors' classification script, as follows:

             DN: dwarf nova
         non-DN: non-dwarf nova
          blank: not classified
  

Ritter_Source_Type
The classification of the CV from the Catalog of Cataclysmic Binaries, Low-Mass X-Ray Binaries and Related Objects (RKCat: Ritter and Kolb 2003, A&A, 404, 301), using the following scheme:

        AC = AM CVn star, spectrum devoid of hydrogen lines, subtype of NL
        AM = polar = AM Her system, subtype of NL, contains a synchronously
              or nearly synchronously rotating, magnetized white dwarf
        CV = cataclysmic variable of unspecified subtype
        DN = dwarf nova
        IP = intermediate polar, shows coherent X-ray period from a non-
              synchronously spinning, magnetized white dwarf; usually a strong
              X-ray source
        LA = low accretion rate polar (LARP), i.e. a somewhat detached
              magnetic CV/pre-CV
        NL = nova-like variable
        NS = system showing negative (nodal) superhumps
        Nb = slow nova (decline from max. by 3 mag. in more than about 100 days)
        SH = non-SU UMa star showing either permanent or transient positive
              (apsidal) superhumps
        SU = SU UMa star, subtype of DN
        SW = SW Sex star, subtype of NL
        UG = dwarf nova of either U Gem or SS Cyg subtype
        VY = VY Scl star (anti dwarf nova), subtype of NL
        WZ = WZ Sge star = SU UMa star with an extremely long supercycle
        ZC = Z Cam star, subtype of DN
        ZZ = white dwarf shows ZZ Ceti-type pulsations
  

Spectrum_Flag
This flag parameter is set to 'Y' or 'N' to indicate whether or not there Is a spectrum for this object given in Breedt et al. (2014, MNRAS, 443, 3174). There are spectra for 242 CVs in this reference.

Orbital_Period
The orbital period of the CV (Porb), in hours, taken from RKCat.

Superhump_Period
The superhump period of the CV (PSH), in hours, taken from RKCat.

Alt_Orbital_Period
The orbital period of the CV, in hours, estimated using the relation Porb = 0.9162(52)*P_SH+ + 5.39(52) (equation 1 from Gansicke et al. 2009, MNRAS, 397, 2170. where periods are in minutes).

Inclination_Limit
A limit flag for the value of the orbital inclination of the CV taken from RKCat that is set to '<' if it is an upper limit.

Inclination
The orbital inclination of the CV, in degrees, taken from RKCat.

Num_Epochs_Observed
The number of epochs in which the CV was observed by the CRTS.

Num_Epochs_Detected
The number of epochs in which the CV was detected by the CRTS.

Num_Outbursts_Detected
The number of outbursts from the CV that were detected by the CRTS, as determined by the classification script (see Section 3 of the reference paper).

Outburst_Vmag
The faint limit of the apparent outburst V-band magnitude of the CV, as determined by the classification script (see Section 3 of the reference paper).

Quiescent_Vmag
The apparent quiescent V-band magnitude of the CV, as determined by the classification script (see Section 3 of the reference paper).

Recurrence_Time_Upper
The upper limit to the outburst recurrence time of the CV, in days, of the CV, as determined by the classification script (see Section 3 of the reference paper).

Duty_Cycle
The duty cycle for the outbursts of the CV, i.e., the fraction of the epochs that it was observed to be in outburst, as determined by the classification script (see Section 3 of the reference paper).

Umag
The SDSS u-band magnitude of the CV, taken from the SDSS data release 8 (Aihara et al. 2011, ApJS, 193, 29). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Gmag
The SDSS g-band magnitude of the CV, taken from the SDSS data release 8 (Aihara et al. 2011, ApJS, 193, 29). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Rmag
The SDSS r-band magnitude of the CV, taken from the SDSS data release 8 (Aihara et al. 2011, ApJS, 193, 29). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Imag
The SDSS i-band magnitude of the CV, taken from the SDSS data release 8 (Aihara et al. 2011, ApJS, 193, 29). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Zmag
The SDSS z-band magnitude of the CV, taken from the SDSS data release 8 (Aihara et al. 2011, ApJS, 193, 29). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

W1_Mag
The WISE w1-band magnitude of the CV, taken from the WISE all-sky data release (Cutri et al. 2012, CDS Cat. II/311). A cone search, of radius 3 arcseconds was used to match to this catalog, and only unique matches were recorded.

W2_Mag
The WISE w2-band magnitude of the CV, taken from the WISE all-sky data release (Cutri et al. 2012, CDS Cat. II/311). A cone search, of radius 3 arcseconds was used to match to this catalog, and only unique matches were recorded.

W3_Mag
The WISE w3-band magnitude of the CV, taken from the WISE all-sky data release (Cutri et al. 2012, CDS Cat. II/311). A cone search, of radius 3 arcseconds was used to match to this catalog, and only unique matches were recorded.

W4_Mag
The WISE w4-band magnitude of the CV, taken from the WISE all-sky data release (Cutri et al. 2012, CDS Cat. II/311). A cone search, of radius 3 arcseconds was used to match to this catalog, and only unique matches were recorded.

Jmag
The 2MASS J-band magnitude of the CV, taken from the 2MASS All-Sky Catalog of Point Sources (Cutri et al. 2003, CDS Cat. II/246; Skrutskie et al. 2006, AJ, 131, 1163). A cone search, of radius 2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Hmag
The 2MASS H-band magnitude of the CV, taken from the 2MASS All-Sky Catalog of Point Sources (Cutri et al. 2003, CDS Cat. II/246; Skrutskie et al. 2006, AJ, 131, 1163). A cone search, of radius 2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Kmag
The 2MASS K-band magnitude of the CV, taken from the 2MASS All-Sky Catalog of Point Sources (Cutri et al. 2003, CDS Cat. II/246; Skrutskie et al. 2006, AJ, 131, 1163). A cone search, of radius 2 arcseconds was used to match to this catalog, and only unique matches were recorded.

UKIDSS_Ymag
The UKIDSS Y-band magnitude of the CV, taken from the UKIDSS data release 10 (Lawrence et al. 2007, MNRAS, 379, 1599). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

UKIDSS_Jmag
The UKIDSS J-band magnitude of the CV, taken from the UKIDSS data release 10 (Lawrence et al. 2007, MNRAS, 379, 1599). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

UKIDSS_Hmag
The UKIDSS H-band magnitude of the CV, taken from the UKIDSS data release 10 (Lawrence et al. 2007, MNRAS, 379, 1599). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

UKIDSS_Kmag
The UKIDSS K-band magnitude of the CV, taken from the UKIDSS data release 10 (Lawrence et al. 2007, MNRAS, 379, 1599). A cone search, of radius 1.2 arcseconds was used to match to this catalog, and only unique matches were recorded.

Distance_Lower
The lower limit to the distance of the CV, in parsecs. This is derived by taking the apparent magnitude of the secondary as the WISE (or UKIDSS) K-band value, and estimating the absolute magnitude of the secondary from the orbital period and the donor sequence from Knigge et al. (2011, ApJS, 194, 28). This method typically underestimates the true distance by a factor of 1.75, as the secondary only contributes ~33 per cent of the light in the K band: see Knigge (2006, MNRAS, 373, 484) for a discussion.

Distance_Upper
The upper limit to the distance of the CV, in parsecs. This is derived from the value of the outburst_vmag parameter (the faint limit of the apparent outburst V-band magnitude) and the absolute V magnitude VO of the CV in outburst as estimated from the orbital period - VO relation (Warner 1987, MNRAS< 227, 23; Patterson 2011, MNRAS, 411, 2695). This is then multiplied by a factor 2 to obtain a more robust upper limit: see Appendix A of the reference paper for more details.

Quiescent_Abs_Vmag_Lower
The faint limit to the absolute V magnitude of the CV in quiescence, derived using the lower limit to the distance (distance_lower) and the quiescent V magnitude (quiescent_vmag).

Quiescent_Abs_Vmag_Upper
The bright limit to the absolute V magnitude of the CV in quiescence, derived using the upper limit to the distance (distance_lower) and the quiescent V magnitude (quiescent_vmag)

ROSAT_Count_Rate
The ROSAT 0.1-2.4 keV count rate, in ct/s, of the X-ray emission from the CV, taken from the ROSAT All-sky Survey Bright and Faint Source Catalogs (Voges et al. 1999, A&A, 349, 389; 2000, IAUC, 7432, available at the HEASARC as the RASSBSC and RASSFSC tables). A cone search, of radius 10 arcseconds was used to match to this catalog, and only unique matches were recorded

ROSAT_Count_Rate_Error
The error in the ROSAT 0.1-2.4 keV count rate, in ct/s, of the X-ray emission from the CV.

Chandra_Flux
The Chandra 0.5-7 keV flux, in erg s-1 cm-2, of the X-ray emission from the CV, taken from the Chandra Source Catalog 1.1 (Evans et al. 2010, ApJS, 189, 37). A cone search, of radius 2 arcseconds was used to match to this catalog, and only unique matches were recorded

Chandra_Flux_Lower
The lower limit to the Chandra 0.5-7 keV flux, in erg s-1 cm-2, of the X-ray emission from the CV.

Chandra_Flux_Upper
The upper limit to the Chandra 0.5-7 keV flux, in erg s-1 cm-2, of the X-ray emission from the CV.

XMM_Flux
The XMM-Newton 0.2-12 keV flux, in erg s-1 cm-2, of the X-ray emission from the CV, taken from the 3XMM-DR4 catalog (Watson et al. 2009, A&A, 493, 339; Rosen et al. 2016, A&A, 590, A1). A cone search, of radius 4 arcseconds was used to match to this catalog, and only unique matches were recorded

XMM_Flux_Error
The error in the XMM-Newton 0.2-12 keV flux, in erg s-1 cm-2, of the X-ray emission from the CV.

Class
The HEASARC Browse object classification, based on the values of the source_type and ritter_source_type parameters. All CVs which were classified as DNs by the classification script (source_type = 'DN') were assigned a HEASARC classification of dwarf novae. For the remaining CVs, the Ritter classification (ritter_source_type value) was used to assign the HEASARC class values.


Contact Person

Questions regarding the DNCVOBCAT database table can be addressed to the HEASARC User Hotline.
Page Author: Browse Software Development Team
Last Modified: Tuesday, 24-Oct-2017 14:13:25 EDT