J/A+A/515/A39 BL Cam light maximum times (Fauvaud+, 2010)
The field high-amplitude SX Phe variable BL Cam:
results from a multisite photometric campaign.
II. Evidence for a binary - possibly triple - system.
Fauvaud S., Sareyan J.-P., Ribas I., Rodriguez E., Lampens P.,
Klingenberg G., Farrell J.A., Fumagalli F., Simonetti J.H., Wolf M.,
Santacana G., Zhou A.-Y., Michel R., Fox-Machado L., Alvarez M.,
Nava-Vega A., Lopez-Gonzalez M.J., Casanova V.M., Aceituno F.J.,
Scheggia I., Rives J.-J., Hintz E.G., Van Cauteren P., Helvaci M.,
Yesilyaprak C., Graham K.A., Kral L., Kocian R., Kucakova H., Fauvaud M.,
Granslo B.H., Michelet J., Nicholson M.P., Vugnon J.-M., Kotkova L.,
Truparova K., Ulusoy C., Yasarsoy B., Avdibegovic A., Blaiek M., Kliner J.,
Zasche P., Bartosikova S., Vilasek M., Trondal O., Van Den Abbeel F.,
Behrend R., Wucher H.
<Astron. Astrophys. 515, A39 (2010)>
=2010A&A...515A..39F 2010A&A...515A..39F
ADC_Keywords: Stars, variable ; Stars, double and multiple
Keywords: stars: variables: delta Scuti - stars: individual: BL Camelopardalis -
stars: oscillations - binaries: general - techniques: photometric
Abstract:
Short-period high-amplitude pulsating stars of Population I (delta Sct
stars) and II (SX Phe variables) exist in the lower part of the
classical (Cepheid) instability strip. Most of them have very simple
pulsational behaviours, only one or two radial modes being excited.
Nevertheless, BL Cam is a unique object among them, being an extreme
metal-deficient field high-amplitude SX Phe variable with a large
number of frequencies. Based on a frequency analysis, a pulsational
interpretation was previously given.
We attempt to interpret the long-term behaviour of the residuals that
were not taken into account in the previous Observed-Calculated
(O-C) short-term analyses.
Description:
An investigation of the O-C times has been carried out, using a data
set based on the previous published times of light maxima, largely
enriched by those obtained during an intensive multisite photometric
campaign of BL Cam lasting several months.
Objects:
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RA (2000) DE Designation(s)
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03 47 19.8 +63 22 43 BL Cam = V* BL Cam
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 45 959 New HJD and BJD light maximum times of BL Cam
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJDmax HJD light maximum time (UTC scale)
15- 27 F13.5 d BJDmax BJD light maximum time (TDB scale)
29- 35 F7.5 d e_HJDmax rms uncertainty on light maximum time
37- 39 A3 --- Filt Filter(s) (1)
41- 45 A5 --- Source Source (2)
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Note (1): When several filters are mentioned, the corresponding light maximum
was determined as a mean value between the different colors' light
Note (2): Sources as follows:
Mar96 = Martin (1996CCDA....3c...7M 1996CCDA....3c...7M )
Mar01 = Martin (2001,
http://www.kingsu.ab.ca/~brian/astro/cba_alta/data_archive/blcam/blcam.html)
AAVSO = AAVSO database
new = our new work
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Acknowledgements:
Eloy Rodriguez Martinez, eloy(at)iaa.es
References:
Rodriguez et al., Paper I, 2007A&A...471..255R 2007A&A...471..255R
(End) Patricia Vannier [CDS] 28-Feb-2010