J/AJ/119/1901 ROTSE all-sky surveys for variable stars (Akerlof+, 2000)
ROTSE all-sky surveys for variable stars. I. Test fields
Akerlof C., Amrose S., Balsano R., Bloch J., Casperson D., Fletcher S.,
Gisle R G., Hills J., Kehoe R., Lee B., Marshall S., McKay T., Pawl A.,
Schaefer J., Szymanski J.A., Wren J.
<Astron. J. 119, 1901 (2000)>
=2000AJ....119.1901A 2000AJ....119.1901A
ADC_Keywords: Binaries, eclipsing ; Stars, variable ; Surveys
Keywords: galaxies: structure - RR Lyrae variable - supernovae: general
Abstract:
The Robotic Optical Transient Search Experiment I (ROTSE-I) experiment
has generated CCD photometry for the entire northern sky in two epochs
nightly since 1998 March. These sky patrol data are a powerful
resource for studies of astrophysical transients. As a demonstration
project, we present first results of a search for periodic variable
stars derived from ROTSE-I observations. Variable identification,
period determination, and type classification are conducted via
automatic algorithms. In a set of nine ROTSE-I sky patrol fields
covering roughly 2000 deg2, we identify 1781 periodic variable stars
with mean magnitudes between mv = 10.0 and mv = 15.5. About 90% of
these objects are newly identified as variable. Examples of many
familiar types are presented. All classifications for this study have
been manually confirmed. The selection criteria for this analysis have
been conservatively defined and are known to be biased against some
variable classes. This preliminary study includes only 5.6% of the
total ROTSE-I sky coverage, suggesting that the full ROTSE-I variable
catalog will include more than 32,000 periodic variable stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 1781 ROTSE-I catalog of periodic variable stars
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See also:
J/AJ/106/2429 : Behlen Obs. variables stars survey (Schmidt+, 1993)
J/AJ/112/2769 : Behlen Observatory Survey. IV. (Schmidt+ 1996)
J/AJ/112/742 : Search for RR Lyrae Variables (Wetterer+ 1996)
J/AcA/48/35 : All Sky Automated Survey variable stars (Pojmamski 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [ROTSE1]
8- 26 A19 --- ROTSE1 Variable object name
28- 31 A4 --- Type Variable object type (1)
33- 42 F10.6 deg RAdeg Right Ascension (J2000)
44- 53 F10.6 deg DEdeg Declination (J2000)
55- 60 F6.3 mag mag Unfiltered ROTSE magnitude
62- 66 F5.3 mag e_mag Uncertainty in mag
68- 79 F12.8 d Period ?=0.0 Derived variability period
81- 90 F10.8 d e_Period ?=0.0 Uncertainty in Period
92- 96 F5.3 mag Amp ?=0.0 Amplitude derived from spline fits to
the light curves
98 I1 --- q_Type Quality flag of the classification (2)
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Note (1): Variability type is defined as follows:
rrab = RR Lyrae (class ab) star
rrc = RR Lyrae (class c) star
ds = Delta Scuti star
c = Cepheid
e = Contact binary system
ew = Eclipsing binary system
m = Mira star
lpv = Long period variable
Note (2): The light curve and its classification was manually graded for
quality from 10 (excellent) to 1 (marginal)
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History:
From AJ electronic edition
(End) Greg Schwarz [AAS] 20-Apr-2000