J/A+A/399/365 ROTSE delta Scuti stars (Blake+, 2003)
A search for period changes in δ Scuti stars with the
super-LOTIS sky patrol system.
Blake C., Fox D.W., Park H.S., Williams G.G.
<Astron. Astrophys. 399, 365 (2003)>
=2003A&A...399..365B 2003A&A...399..365B
ADC_Keywords: Stars, variable
Keywords: stars: oscillations - stars: variables: delta Scuti -
techniques: photometric
Abstract:
We have observed a sample of delta Scuti stars discovered by the ROTSE
collaboration in 1999 with Super-LOTIS in order to characterize
changes in their pulsation periods over a time baseline of roughly
three years. Achieving these goals required the creation of an
automated astrometric and photometric data reduction pipeline for the
Super-LOTIS camera. Applying this pipeline to data from a June 2002
observing campaign, we detect pulsations in 18 objects, and find that
in two cases the periods have changed significantly over the three
years between the ROTSE and Super-LOTIS observations. Since theory
predicts that evolutionary period changes should be quite small,
sources of non-evolutionary period changes due to the interactions of
pulsations modes are discussed.
Description:
Observations of the target stars were carried out during May and June,
2002, with the Super Livermore Optical Transient Imaging System
(Super-LOTIS) robotic telescope located at the Steward Observatory
site on Kitt Peak, Arizona.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 53 18 The delta Scuti star sample
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See also:
J/AJ/119/1901 : ROTSE all-sky surveys for variable stars (Akerlof+, 2000)
J/A+A/404/621 : Light curves of ROTSE-I delta Scuti type stars (Jin+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [ROTSE]
7- 10 I4 --- ROTSE ROTSE number (1)
11 A1 --- n_ROTSE [a] a: The known variable star YZ Boo.
14- 22 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
25- 33 F9.6 deg DEdeg Declination in decimal degrees (J2000)
36- 40 F5.2 mag mag ROTSE magnitude
42- 47 F6.4 d Per Period (2)
50- 53 F4.2 mag Dmag ΔMag (amplitude)
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Note (1): These data were collected from the ROTSE variable star database,
indicated as available at
http://umaxp1.physics.lsa.umich.edu/~mackay/rsv1/rsv1_home.htm
[Note: this database could never be reached]
Note (2): The listed periods are those determined by the ROTSE team
and reported in the the ROTSE database.
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 31-Mar-2003