J/AJ/156/204 BEST-II catalog of variables. III. Puppis field (Dreyer+, 2018)
The Berlin Exoplanet Search Telescope II catalog of variable stars.
III. Census of variable stars in a Puppis field.
Dreyer C., Csizmadia S., Titz-Weider R., Eigmuller P., Fruth T., Cabrera J.,
Erikson A., Rauer H.
<Astron. J., 156, 204 (2018)>
=2018AJ....156..204D 2018AJ....156..204D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Binaries, eclipsing ; Constellations ;
Photometry ; Optical
Keywords: binaries: eclipsing - catalogs - methods: data analysis -
stars: variable: general - techniques: photometric
Abstract:
The Berlin Exoplanet Search Telescope II (BEST II) is a ground-based,
small aperture, wide-angle telescope used to search for stellar light
variations in the southern hemisphere. We report the results of a
monitoring campaign observing a field in the Puppis constellation in
late 2011/early 2012. Light curves were obtained for 130472 stars, out
of which we identify 2169 variables, including 1829 newly discovered,
26 previously known, and 314 suspected variable stars. We determine
periods and variability class for two previously known, but only
suspected to be, variable stars. For eight individual eclipsing binary
stars, including the two previously known but unclassified binaries,
the system parameters were derived at the epoch of the observation by
modeling the light curves. Eventually, in a catalog for all variable
stars, we present coordinates, magnitude, and elements of light
variations, e.g., epoch, period, amplitude, type, and light curves.
This catalog concludes the BEST/BEST II project.
Description:
The Berlin Exoplanet Search Telescope (BEST) is a ground-based photometric
search project that was initiated in 2001 by the Institute for Planetary
Research of the German Aerospace Agency (DLR). The small aperture automatic
BEST II system consists of a 25 cm Baker-Ritchey-Chretien telescope with
a focal ratio of f/5.0 on a German-equatorial mount. It is equipped with
a CCD camera with 4096x4096 pixels. The field of view (FoV) of the
telescope is 1.7°x1.7°, allowing for a large number of stars to be
observed simultaneously. The catalog of variable stars presented here was
derived from an observation campaign between 2011 November 9 and 2012
April 6 performed with BEST II monitoring a target field in the Puppis
(Pup) constellation (hereafter, field F20) located south of the Galactic
plane. Four subfields F20a, F20b, F20c, and F20d (see Figure 1) were
observed during 61 nights in alternating sequences a-b-c-d (changing after
every exposure) so that the decreased number of bright stars was
compensated by an FoV that was four times larger. All observations were
obtained without any filter, i.e., in white light leading to a bandpass
limitation by the quantum efficiency of the detector, which peaks in
the red at ca. 650 nm (instrument magnitude RB) close to the standard
Johnson R-band at 658 nm.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 64 4 BEST II target field F20 information
table3.dat 141 2169 Catalog of variable stars detected in BEST II
field F20
table4.dat 240 26 Known variable stars in the F20 field
--------------------------------------------------------------------------------
See also:
B/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)
J/AJ/134/766 : BEST variable stars in LRc1 field (Karoff+, 2007)
J/AJ/134/1560 : BEST periodic variable stars in IR01 field (Kabath+, 2007)
J/AJ/136/654 : BEST periodic variable stars in LRa1 field (Kabath+, 2008)
J/A+A/506/569 : BEST-II periodic variables in CoRoT LRa02 field (Kabath+, 2009)
J/AJ/137/3911 : BEST periodic variable stars in LRc2 field (Kabath+, 2009)
J/AJ/143/140 : BEST-II periodic variables in CoRoT LRa02 field. II.
(Fruth+, 2012)
J/AJ/146/136 : BEST-II catalog of variables. I. Southern fields (Fruth+, 2013)
J/AJ/151/110 : BEST-II catalog of variables: CoRoT SRc02 field
(Klagyivik+, 2016)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Field BEST II subfield designation
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 13 I2 s RAs Second of Right Ascension (J2000)
15 A1 --- DE- Sign of the Declination (J2000)
16- 17 I2 deg DEd Degree of Declination (J2000)
19- 20 I2 arcmin DEm Arcminute of Declination (J2000)
22- 23 I2 arcsec DEs Arcsecond of Declination (J2000)
25- 34 A10 "date" Date1 First date of observation
36- 45 A10 "date" Date2 Last date of observation
47- 48 I2 --- Nights [61] Number of good photometric nights with
observations
50- 53 I4 --- Nfr [1958/2010] Number of acquired frames
55- 59 I5 --- NLCt [31022/34150] Number of total light curves
61- 64 I4 --- NLCl [1096/2004] Number of low-noise light curves
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Field BEST II subfield designation
6- 15 A10 --- BESTII The BEST II identifier (F20a_NNNNN) (1)
17- 18 A2 --- f_BESTII Flag on BESTII (2)
20- 35 A16 --- 2MASS The 2MASS identifier (HHMMSSss+DDMMSSs)
37- 38 I2 h RAh Hour of Right Ascension (J2000)
40- 41 I2 min RAm Minute of Right Ascension (J2000)
43- 46 F4.1 s RAs Second of Right Ascension (J2000)
48 A1 --- DE- Sign of the Declination (J2000)
49- 50 I2 deg DEd Degree of Declination (J2000)
52- 53 I2 arcmin DEm Arcminute of Declination (J2000)
55- 58 F4.1 arcsec DEs Arcsecond of Declination (J2000)
60- 64 F5.2 mag RBmag [9.7/17.96] Apparent RB instrument magnitude
66- 73 F8.3 d T0 [-800/249.172]? Epoch (3)
75- 83 F9.6 d Per [0.025834/85]? Period
85- 93 F9.6 d e_Per [1e-06/10]? Uncertainty in Per
95- 99 F5.3 mag A [0.004/2.1]? Amplitude
101-105 F5.3 mag e_A [0.006/0.6]? Uncertainty in A
107-113 F7.3 --- j-index [0.1/109] The j-index value
115-121 A7 --- Type Variability type (G1)
123-141 A19 --- OName GCVS and/or VSX identifier
--------------------------------------------------------------------------------
Note (1): Variable stars in the F20 field sorted by BEST II ID.
Note (2): Flag as follows:
c = Star contaminated by neighboring stars;
s = Star suspected to be variable;
k = Previously known variable star. The GCVS and/or VSX identifier is provided
in the "OName" column.
Note (3): Given in reduced Julian date, rHJD=HJD-2455800.0.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Field BEST II subfield designation
6- 15 A10 --- BESTII The BEST II identifier (F20a_NNNNN)
17- 35 A19 --- OName GCVS and/or VSX identifier
37- 41 F5.2 mag RBmag [9.96/16.13] BEST II instrumental magnitude RB
43- 49 F7.5 d Per [0.39263/4.71]? BEST II period
51- 57 F7.5 d e_Per [4e-05/0.08]? Uncertainty in Per
59- 68 F10.6 d PerP [0.392639/615]? Period obtained by previous
survey
70- 73 A4 --- Type BEST II classification (G1)
75- 88 A14 --- TypeP Classification obtained by previous survey (G1)
90-141 A52 --- Ref Reference(s)
143-240 A98 --- Bibcode Bibcode(s) of the reference(s) (or website)
--------------------------------------------------------------------------------
Global notes:
Note (G1): In our analysis, we used the following subtypes of intrinsic
variables:
DCEP/DCEPS = δ Cephei;
DSCT = δ Scuti;
E = Eccentric type;
EA = Algol type detached eclipsing binary;
EB = β Lyrae type semi-detached eclipsing binary;
ELL = Rotating ellipsoidal variable;
EW = Contact binary or W Ursae Majoris-type;
EW/DSCT = The light curves of the EW and DSCT classes may be
indistinguishable with photometric data of a ground-based survey
in some low-amplitude cases. For such uncertain classifications,
the class of (EW/DSCT) was introduced;
GDOR = γ Doradus;
LPV = Long Period Variable star;
RR = RR Lyrae;
SP = Star with typical features of star spots;
SPV = Short Period Variable star;
SXPHE = SX Phoenicise type;
VAR = Remaining object showing clear variability but for which no
assignment is possible, is classified as variable;
YSO = Periodic PMS star marked as young stellar object;
DCEP-FO = First-tone classical Cepheid;
EC = Contact binary;
ESD = Semidetached eclipsing binary;
ED = Detached binary;
M = Mira-type star;
MISC = Miscellaneous variable;
SR: = Semiregular variable;
Suspected = Suspected variable.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Fruth et al. Paper I. 2013AJ....146..136F 2013AJ....146..136F, Cat. J/AJ/146/136
Klagyivik et al. Paper II. 2016AJ....151..110K 2016AJ....151..110K, Cat. J/AJ/151/110
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 28-Mar-2019