J/MNRAS/482/3058 New variable stars towards Galactic Bulge (Kains+, 2019)
New variable stars towards the Galactic Bulge. I. The bright regime.
Kains N., Calamida A., Rejkuba M., Bhardwaj A., Inno L., Sahu K. C.,
Zoccali M., Bono G., Surot F., Anderson J., Casertano S.
<Mon. Not. R. Astron. Soc. 482, 3058 (2019)>
=2019MNRAS.482.3058K 2019MNRAS.482.3058K (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, variable ; Binaries, eclipsing ;
Photometry, CCD
Keywords: binaries: eclipsing - Galaxy: Bulge - stars: variables
Abstract:
We report the detection of 3714 variable stars towards the Galactic
bulge, including 2521 previously uncatalogued variables, using
time-series photometry extracted from data obtained with the VIMOS
imager at the Very Large Telescope. Observations of the Sagittarius
Window Eclipsing Extrasolar Planet Search (SWEEPS) field in the
Galactic Bulge were taken over 2yr between March and October at a
cadence of ∼4d, enabling the detection of variables with periods up
to ∼100d. Many of these were already known, but we detected a
significant number of new variables, including 11 Cepheids, a further
88 potential Cepheid candidates, and many contact binaries. Here we
publish the catalogue of the new variables, containing coordinates,
mean magnitudes as well as periods and classification; full light
curves for these variables are also made available electronically.
Description:
List of all observing epochs
Full list and properties of new variables (Table 4 & 5 merged into one
table) V and I time-series photometry all new variables in the SWEEPS
field covered by our VIMOS observations
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
vimosvar.dat 181 2521 Table of variables (Tables 4-5 in the paper)
vimosep.dat 26 2502 List of observing epochs
lc/* . 4499 Individual light curves
list.dat 162 24 List of fits VIMOS reference images
fits/* . 24 Individual VIMOS reference images
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See also:
J/AcA/66/405 : Galactic bulge eclipsing + ellipsoidal binaries
(Soszynski+, 2016)
Byte-by-byte Description of file: vimosvar.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- ID Variable name (sNaN-NNNN.NNN or sNbN-NNNN.NNN)
15- 22 A8 --- Class Variable type (1)
24- 33 F10.6 d Per Period
36- 40 F5.2 mag <Imag> Median I-band magnitude
43- 47 F5.2 mag <Vmag> ?=99 Median V-band magnitude
50- 54 F5.2 mag <Jmag> ?=99 Median J-band magnitude from VVV (2)
57- 61 F5.2 mag <Kmag> ?=99 Median K-band magnitude from VVV (2)
63- 64 I2 h RAh Right Ascension (J2000)
66- 67 I2 min RAm Right Ascension (J2000)
69- 73 F5.2 s RAs Right Ascension (J2000)
75 A1 --- DE- Declination sign (J2000)
76- 77 I2 deg DEd Declination (J2000)
79- 80 I2 arcmin DEm Declination (J2000)
82- 85 F4.1 arcsec DEs Declination (J2000)
87-105 I19 --- GaiaID ? ID of match in the Gaia DR2 catalogue,
Cat. I/345
107-113 F7.2 mas/yr pmRAG ?=99 Proper motion in RA direction from
Gaia DR2 (pmra_gaia)
115-121 F7.2 mas/yr e_pmRAG ?=99 Proper motion in RA direction from
Gaia DR2 (sigpmra_gaia)
123-129 F7.2 mas/yr pmDEG ?=99 Proper motion in RA direction from
Gaia DR2 (pmdec_gaia)
131-137 F7.2 mas/yr e_pmDEG ?=99 Proper motion in RA direction from
Gaia DR2 (sigpmdec_gaia)
139-147 I9 --- VIRACID ?=999999999 ID in the VIRAC catalogue,
Smith et al. (2018MNRAS.474.1826S 2018MNRAS.474.1826S)
149-155 F7.2 mas/yr pmRAV ?=99 Proper motion in RA direction from VVV
(pmra_vvv)
157-163 F7.2 mas/yr e_pmRAV ?=99 Proper motion in RA direction from VVV
(sigpmra_vvv)
165-171 F7.2 mas/yr pmDEV ?=99 Proper motion in RA direction from VVV
(pmdec_vvv)
173-179 F7.2 mas/yr e_pmDEV ?=99 Proper motion in RA direction from VVV
(sigpmdec_vvv)
181 I1 --- Flag [0/1] Flag for JK photometry (photJKflag) (3)
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Note (1): Variable types as follows:
ceph = plausible Cepheid
cephcand = consistent with Cepheid light curve, but only confirmed by
one method (see paper)
dsct = Delta Scuti
ebec = Contact binary
ebed = Detached binary
lpv = Long-Period Variable
rrl = plausible RR Lyrae
other = does not fit in any of above categories
Note (2): J and K photometry are from Surot et al. (in prep.), when available,
or from VIRAC matches; Surot et al. photometry is of better quality.
Note (3): flag for JK photometry as follows:
1 = JK photometry from Surot et al. (in prep.)
0 = JK photometry from the VIRAC catalogue
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Byte-by-byte Description of file: vimosep.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 JD JD Julian date
15- 16 I2 s ExpTime Exposure time
18 A1 --- Filter [VI] Filter
20- 26 A7 --- Pointing VIMOS Pointing
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Byte-by-byte Description of file (#): lc/*
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Bytes Format Units Label Explanations
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1- 13 F13.5 JD JD Julian date
15- 20 F6.3 mag mag OGLE-calibrated magnitude
22- 26 F5.3 mag e_mag ?=- Error on the magnitude
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix scale Scale of the image
26- 29 I4 --- Nx Number of pixels along X-axis
31- 34 I4 --- Ny Number of pixels along Y-axis
36- 58 A23 "datime" Obs.date Observation date (YYYY-MM-DDThh:mm:ss.sss)
60- 64 I5 Kibyte size Size of FITS file
66- 87 A22 --- FileName Name of FITS file, in subdirectory fits
89-163 A75 --- Title Title of the FITS file
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Acknowledgements:
Noe Kains, noekains(at)gmail.com
(End) Noe Kains [STScI], Patricia Vannier [CDS] 11-Dec-2018