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J/other/IBVS/6106   RR Lyrae stars in GCVS observed by the QES  (Bramich+, 2014)

RR Lyrae stars in the GCVS observed by the Qatar Exoplanet Survey. Bramich D.M., Alsubai K.A., Arellano Ferro A., Parley N.R., Collier Cameron A., Horne K., Pollacco D., West R.G. <IAU Inform. Bull. Var. Stars IBVS, 6106 (2014)> =2014IBVS.6106....1B
ADC_Keywords: Stars, variable ; Stars, horizontal branch ; Surveys ; Photometry, CCD Keywords: variable stars - RR Lyrae - surveys - photometry - CCD Abstract: We used the light curve archive of the Qatar Exoplanet Survey to investigate the RR Lyrae variable stars listed in the GCVS. Of 588 variables studied, we reclassified 14 as eclipsing binaries, one as an RS CVn type variable, one as an irregular variable, four as classical Cepheids, and one as a type II Cepheid, while also improving their periods. We also report new RR Lyrae sub-type classifications for 65 variables and improve on the GCVS period estimates for 135 RR Lyrae variables. There are seven double-mode RR Lyrae stars in the sample for which we measured their fundamental and first overtone periods. Finally, we detected the Blazhko effect in 38 of the RR Lyrae stars for the first time and we successfully measured the Blazhko period for 26 of them. Description: We provide the 1783 light curves for the sample of 588 photometrically variable objects described in this paper. The 588 variables breakdown by type as follows: 482 RRAB, 78 RRC, 7 RR(B), 13 EW, 1 EA, 1 RS, 1 IA, 3 DCEP, 1 DCEPS and 1 CWB. Note that QES photometry is in the optical, it is unfiltered, and it is calibrated on an absolute scale with a scatter of ∼0.1mag using UCAC3 magnitudes. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 69 588 List of studied variables (all stars in tables 1-6) table1.dat 104 21 Variable stars reclassified as eclipsing binaries, RS Canum Venaticorum-type variables (or RS CVn), irregular variables of early spectral type, classical Cepheids (or type I Cepheids), and type II Cepheids table2.dat 104 61 RR Lyrae stars with new sub-type classifications table3.dat 104 7 Double-mode RR Lyrae stars in our sample that are pulsating simultaneously in the fundamental and first overtone modes table4.dat 104 83 RR Lyrae stars with improved periods table5.dat 82 27 New detections of the Blazhko effect in Galactic RR Lyrae stars. These stars are not listed in the catalogue of Skarka (2013, J/A+A/549/A101) table6.dat 79 1358574 Unfiltered optical time-series CCD photometry for 588 objects
See also: B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013) I/315 : UCAC3 catalogue (Zacharias+ 2010) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [3UC] 4- 13 A10 --- UCAC3 UCAC3 star designation (I/315) 15- 23 A9 --- Name GCVS star name 27- 28 I2 h RAh Simbad or UCAC3 Right ascension (J2000) 30- 31 I2 min RAm Simbad or UCAC3 Right ascension (J2000) 33- 37 F5.2 s RAs Simbad or UCAC3 Right ascension (J2000) 39 A1 --- DE- Simbad or UCAC3 Declination sign (J2000) 40- 41 I2 deg DEd Simbad or UCAC3 Declination (J2000) 43- 44 I2 arcmin DEm Simbad or UCAC3 Declination (J2000) 46- 49 F4.1 arcsec DEs Simbad or UCAC3 Declination (J2000) 51- 56 A6 --- VType GCVS type 58- 68 F11.9 d Per ? GCVS period 69 A1 --- u_Per Uncertainty flag on period
Byte-by-byte Description of file: table[1234].dat
Bytes Format Units Label Explanations
1- 10 A10 --- UCAC3 UCAC3 star designation 12- 20 A9 --- Name GCVS star name 22- 23 I2 h RAh Right ascension (J2000) 25- 26 I2 min RAm Right ascension (J2000) 28- 32 F5.2 s RAs Right ascension (J2000) 34 A1 --- DE- Declination sign (J2000) 35- 36 I2 deg DEd Declination (J2000) 38- 39 I2 arcmin DEm Declination (J2000) 41- 44 F4.1 arcsec DEs Declination (J2000) 46- 50 A5 --- VTyp0 GCVS variable type 52- 56 A5 --- VType This paper variable type 57- 59 A3 --- n_VType [abefghij, ] Individual notes (1) 61- 66 F6.3 mag mag UCAC3 aperture magnitude 68- 78 F11.9 d Per0 ?=- GCVS period 80- 88 F9.6 d Per ?=- This paper (fundamental) period (2) 89 A1 --- n_Per [cd] Note on our period (1) 90- 96 F7.5 d P1 ? First overtone period for double-mode RRLyr 98-104 F7.5 --- P1/P0 ? Period ratio for double-mode RRLyr
Note (1): Notes as follows: a = Clear detection of the O'Connell effect (i.e. unequal brightness of the two maxima) b = Classification taken from van den Berg et al. (2002A&A...382..888V) c = Orbital period is 2.823094d (Mathieu et al. 2003AJ....125..246M) d = This star has a single light curve in our data that spans ∼195-days (or ∼2.5 cycles) e = Originally classified as a classical Cepheid by Schmidt & Gross (1990PASP..102..978S) f = Classification taken from Andrievsky et al. (2010PASP..122..877A) g = Also classified as a classical Cepheid by Wils, Lloyd & Bernhard (2006MNRAS.368.1757W. Cat. J/MNRAS/368/1757) h = Clearly exhibits the Blazhko effect in our data i = Not listed in the set of known Galactic field Blazhko RR Lyrae stars from Skarka (2013A&A...549A.101S, Cat. J/A+A/549/A101) j = The light curve has a strange shape for an RR Lyrae star. However, the period and amplitude are consistent with an RRC classification. Note (2): fundamental period for the double-mode RR Lyrae stars (table3). All of our period estimates improve on the GCVS periods and they are precise to the last decimal place quoted.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 10 A10 --- UCAC3 UCAC3 star designation 12- 20 A9 --- Name GCVS star name 22- 23 I2 h RAh Right ascension (J2000) 25- 26 I2 min RAm Right ascension (J2000) 28- 32 F5.2 s RAs Right ascension (J2000) 34 A1 --- DE- Declination sign (J2000) 35- 36 I2 deg DEd Declination (J2000) 38- 39 I2 arcmin DEm Declination (J2000) 41- 44 F4.1 arcsec DEs Declination (J2000) 46- 49 A4 --- VType RR Lyrae type 50 A1 --- n_VType [a] small Blazhko amplitude (1) 52- 57 F6.3 mag mag UCAC3 aperture magnitude 59- 68 F10.8 d Per ?=- GCVS period 70 A1 --- l_PerB Limit flag on PerB 71- 76 F6.2 d PerB ?=- Blazhko period 78- 82 F5.2 d e_PerB ? rms uncertainty on PerB
Note (1): Although the amplitude modulations are small, they are clear to the eye in the unphased light curve and they are strongly detected in the power spectrum. To help confirm our conclusions for this star, we checked the literature and found that Gomez-Forrellad & Garcia-Melendo (1995IBVS.4247....1G) also suspected this star of exhibiting the Blazhko effect.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [3UC] 4- 13 A10 --- UCAC3 UCAC3 star designation 15- 23 A9 --- Name GCVS star name 25- 30 A6 --- VType RR Lyrae type 32- 44 F13.5 d HJD Heliocentric Julian day 46- 51 F6.3 mag mag Calibrated QES magnitude 53- 57 F5.3 mag e_mag Error on the calibrated QES magnitude 59- 79 A21 --- LCName Light curve identifier
Acknowledgements: Daniel Bramich, dan.bramich(at)hotmail.co.uk History: * 01-Jun-2014: First on-line version * 26-Jan-2016: some positions corrected in table star.dat
(End) Daniel Bramich [QEERI, Qatar], Patricia Vannier [CDS] 28-May-2014
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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