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
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