J/A+A/542/A89 Hvar survey for roAp stars. I. (Paunzen+, 2012)
The Hvar survey for roAp stars. I. The survey observations.
Paunzen E., Netopil M., Rode-Paunzen M., Handler G., Bozic H., Ruzdjak D.,
Sudar D.
<Astron. Astrophys. 542, A89 (2012)>
=2012A&A...542A..89P 2012A&A...542A..89P
ADC_Keywords: Stars, Ap ; Stars, variable ; Photometry, CCD
Keywords: stars: chemically peculiar - stars: variables: general -
stars: early-type - stars: oscillations
Abstract:
The rapidly oscillating Ap (roAp) stars exhibit short time scale
photometric and/or radial velocity variations, which are most
important to test current pulsation models as well as our assumptions
of the atmospheric structure characteristics. In addition, their
chemical peculiarity makes them very interesting for probing stellar
formation and evolution in the presence of a global magnetic field. To
date, only a limited number of about 45 roAp stars are known. In order
to increase the sample, we obtained photometric time series of 20 good
roAp candidates to search for pulsations. We present the time series
analysis of about 60 hours of CCD photometry taken at the 1 meter
Austrian-Croatian Telescope (Hvar Observatory) and derive effective
temperatures for the programme objects. The upper amplitude limits of
the Fourier spectra are typically below 2mmag in Bessell B with one
good candidate for follow-up observations to find possible pulsation.
In addition, we present a list of further roAp candidates, worth to be
(re)investigated.
Description:
CCD photometric time series in Bessell B of 20 roAp candidates were
obtained at the Hvar observatory (Croatia).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 72 20 Studied stars
phot/* . 28 Individual light curve files
--------------------------------------------------------------------------------
See also:
III/260 : General Catalogue of Ap and Am stars (Renson+ 2009)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- --- [Renson]
8- 12 I5 --- Renson Renson identification number (Cat. III/260)
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 21 I2 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 31 I2 arcsec DEs Declination (J2000)
33- 47 A15 --- OName Other name
50- 60 A11 --- File1 First photometry table, in "phot" subdirectory
62- 72 A11 --- File2 Second photometry table, in "phot" subdirectory
--------------------------------------------------------------------------------
Byte-by-byte Description of file: phot/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d JD Julian date of observation
23- 29 F7.4 mag Bmag ?=0 Differential Bessell B magnitude
--------------------------------------------------------------------------------
Acknowledgements:
Ernst Paunzen, epaunzen(at)physics.muni.cz
(End) Patricia Vannier [CDS] 19-Jun-2012