J/MNRAS/421/181 EC 01541-1409 pulsations frequencies (Reed+, 2012)
Multiyear and multisite photometric campaigns on the bright high-amplitude
pulsating subdwarf B star EC 01541-1409.
Reed M.D., Kilkenny D., O'Toole S., Ostensen R.H., Honer C., Gilker J.T.,
Quint A.C., Doennig A.M., Hicks L.H., Thompson M.A., McCart II P.A.,
Zietsman E., Chen W.-P., Chen C.-W., Lin C.-C., Beck P., Degroote P.,
Barlow B.N., Reichart D.E., Nysewander M.C., Lacluyze A.P., Ivarsen K.M.,
Haislip J.B., Baran A., Winiarski M., Drozdz M.
<Mon. Not. R. Astron. Soc., 421, 181-189 (2012)>
=2012MNRAS.421..181R 2012MNRAS.421..181R
ADC_Keywords: Stars, variable ; Stars, subdwarf; Stars, B-type
Keywords: stars: individual: EC 01541-1409 - stars: oscillations - subdwarfs -
stars: variables: general
Abstract:
We present follow-up observations of the pulsating subdwarf B (sdB)
star EC 01541-1409 as part of our efforts to resolve pulsation
spectra for use in asteroseismological analyses. This paper reports on
data obtained from a single-site campaign, during 2008, and a
multisite campaign, during 2009. From limited 2008 data, we were able
to clearly resolve and pre-whiten 24 periods. A subsequent multisite
campaign spanning nearly 2 months found over 30 individual
periodicities most of which were unstable in amplitude and/or phase.
Pulsation amplitudes were found to the detection limit, meaning that
further observations would likely reveal more periodicities.
Description:
Data were obtained from six different observatories, each with a
somewhat different CCD setup. South African Astronomical
Observatory's (SAAO's) 1.0-m telescope observed during both 2008
and 2009.
Objects:
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RA (2000) DE Designation(s)
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01 56 31.90 -13 54 26.4 EC 01541-1409 = GD 1053
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 96 45 Frequencies and amplitudes for EC 01541 from the
2008 single-site and 2009 multisite campaigns
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See also:
J/A+A/393/965 : Slowly pulsating B stars intrinsic frequencies (de Cat+, 2002)
J/A+A/506/143 : Pulsations of HD 181231 (Neiner+, 2009)
J/A+A/513/A6 : NOT survey of subdwarf B stars (Ostensen+, 2010)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- ID Frequency name ('s' are 'suggested' frequencies)
4 A1 --- n_ID [bc] Possible overtone (1)
6- 13 F8.2 uHz F08 ?=- Frequency for 2008 campaign
(Oct 25-27; resolution limit: 5uHz)
15- 17 F3.2 uHz e_F08 ? rms uncertainty on F08
19- 27 F9.3 uHz F09 ?=- Frequency for entire 2009 campaign
(Oct 21/Nov 26; resolution limit 0.32uHz)
29- 32 F4.3 uHz e_F09 ? rms uncertainty on F09
34- 41 F8.2 uHz F09.1 ?=- Frequency for part 1 2009 campaign
(Oct 21/Nov 8; resolution limit 0.67uHz)
43- 45 F3.2 uHz e_F09.1 ? rms uncertainty on F09.1
47- 54 F8.2 uHz F09.2 ?=- Frequency for part 2 2009 campaign
(Nov 18/Nov 26; resolution limit 1.44uHz)
56- 58 F3.2 uHz e_F09.2 ? rms uncertainty on F09.2
60- 64 F5.2 mmag Amp08 ?=- Amplitude for 2008 campaign
(Oct 25-27; detection limit 0.37mmag)
66- 68 F3.2 mmag e_Amp08 ? rms uncertainty on Amp08
70- 73 F4.2 mmag Amp09 ?=- Amplitude for entire 2009 campaign
(Oct 21/Nov 26; detection limit 0.33mmag)
75- 77 F3.2 mmag e_Amp09 ? rms uncertainty on Amp09
79- 82 F4.2 mmag Amp09.1 ?=- Amplitude for part 1 2009 campaign
(Oct 21/Nov 8; detection limit 0.48mmag)
83 A1 --- n_Amp09.1 [a] Note on Amp09.1 (1)
85- 87 F3.2 mmag e_Amp09.1 ? rms uncertainty on Amp09.1
89- 92 F4.2 mmag Amp09.2 ?=- Amplitude for part 1 2009 campaign
(Nov 18/Nov 26; detection limit 0.32mmag)
94- 96 F3.2 mmag e_Amp09.2 ? rms uncertainty on Amp09.2
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Note (1): Notes as follows:
a = This amplitude is below the formal 4σ detection limit
b = is 2f2, though they are not likely overtones, based on amplitudes
c = is 2f3, though they are not likely overtones, based on amplitudes
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Oct-2012