J/MNRAS/461/1576 EX Hya mid-eclipse timings (Echevarria+, 2016)
A radial velocity study of the intermediate polar EX HYdrae.
Echevarria J., Ramirez-Torres A., Michel R., Hernandez Santisteban J.V.
<Mon. Not. R. Astron. Soc. 461, 1576 (2016)>
=2016MNRAS.461.1576E 2016MNRAS.461.1576E (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, cataclysmic; Binaries, eclipsing
Keywords: techniques: radial velocities - eclipses - ephemerides -
novae, cataclysmic variables
Abstract:
A study on the intermediate polar EX Hya is presented, based on
simultaneous photometry and high-dispersion spectroscopic
observations, during four consecutive nights. The strong photometric
modulation related to the 67-min spin period of the primary star is
clearly present, as well as the narrow eclipses associated with the
orbital modulation. Since our eclipse timings have been obtained
almost 91000 cycles since the last reported observations, we present
new linear ephemeris, although we cannot rule out a sinusoidal
variation suggested by previous authors.
Description:
We present a compilation of all published mid-eclipses timings of the
intermediate polar EX HYdrae since its first observations in 1962. In
combination with the newly presented data, it is possible to construct
an updated ephemeris:
HJD_eclipse = 2437699.94131(11) + 0.068233843(1)E
The ephemeris allowed to construct the O-C diagram presented in Figure
3 and to calculate the corresponding epochs, also presented in the
current table
Objects:
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RA (2000) DE Designation(s)
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12 52 24.40 -29 14 56.7 EX Hydrae = V* EX Hya
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 23 342 Mid-eclipse timings of EX Hydrae
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Epoch Epoch since first observation
8- 21 F14.6 d HJD Heliocentric Julian Date of mid eclipse
23 I1 --- Source Original source of data (1)
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Note (1): References as follows:
1 = Vogt et al. (1980A&A....85..106V 1980A&A....85..106V)
2 = Sterken et al. (1983A&A...118..325S 1983A&A...118..325S)
3 = Jablonski and Busko (1985MNRAS.214..219J 1985MNRAS.214..219J)
4 = Hill et al. (1986, IAU Symp. 118, Instrumentation and Research
Programmes for Small Telescopes. Hearnshaw J.B., Cottrell P.L.,
editors. D. Reidel Publ.; Dordrecht; )
5 = Bond et al. (1988MNRAS.232..753B 1988MNRAS.232..753B )
6 = Hellier and Sproats (1992IBVS.3724....1H 1992IBVS.3724....1H)
7 = Echevarria et al. (2016, this paper)
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Acknowledgements:
Juan V. Hernandez Santisteban, j.v.hernandez(at)soton.ac.uk
(End) J. Hernandez Santisteban [U. of Southampton], P. Vannier [CDS] 20-Jan-2016