J/A+A/554/A25 Photometry of SDSS J152419.33+220920.0 (Michel+, 2013)
Photometry of the eclipsing cataclysmic variable SDSS J152419.33+220920.0.
Michel R., Echevarria J., Hernandez Santisteban J.V.
<Astron. Astrophys. 554, A25 (2013)>
=2013A&A...554A..25M 2013A&A...554A..25M
ADC_Keywords: Binaries, cataclysmic ; Binaries, eclipsing ; Photometry, UBV
Keywords: novae - cataclysmic variables -
stars: individual (SDSS J152419.33+220920.0)
Abstract:
We present new photometry of the faint (g∼19mag) and poorly studied
cataclysmic variable SDSS J152419.33+220920.0, analyze its light curve
and provide an accurate ephemeris for this system. Time-resolved CCD
differential photometry was carried out using the 1.5m and 0.84m
telescopes at the Observatorio Astronomico Nacional at San Pedro
Martir. All observations were taken in white-light (no filter).
This table contains the differential photometry for the system
obtained during six nights (covering more than twenty primary eclipse
cycles in more than three years). The reference for the photometry is
SDSS J152415.99+220804.0, g=17.77 (marked as star C1 in the paper).
The associated errors are 0.02mag outside eclipse. The information
for each observation run is presented in Table 1 and the light-curves
using this data are presented in Figure 4.
Our light curve analysis shows that only two fundamental frequencies
are present, corresponding to the orbital period and a modulation with
twice this frequency. We determine the accurate ephemeris of the
system to be HJDeclipse=2454967.6750(1)+0.06531866661(1)E. A
double-hump orbital period modulation, a standing feature in several
bounce-back systems at quiescence, is present at several epochs.
However, we found no other evidence to support the hypothesis that
this system belongs to the post-minimum orbital-period systems.
Description:
White-light time-resolved photometry of the star was acquired at the
1.5m telescopie of the Observatorio Astronomico Nacional at San Pedi
Martir on 16, 21 and 22 May 2009.
Objects:
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RA (2000) DE Designation(s)
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15 24 19.33 +22 09 20.1 SDSS J152419.33+220920.0 = SDSS J152419.33+220920.0
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 41 6 Log of photometric observations
fig4.dat 22 1004 Photometric observations
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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- 11 A11 "YYYY/MMM/DD" UTC Universal Time Date of photometric night
13- 22 F10.5 d HJDo Heliocentric Julian Date of first exposure
24- 33 F10.5 d HJDf Heliocentric Julian Date of last exposure
35- 37 I3 --- NExp Number of exposures taken
39- 41 I3 s ExpT Exposure time of each observation
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Byte-by-byte Description of file: fig4.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian Date of exposure (UTC)
16- 20 F5.3 mag Dmag Differential magnitude (white light)
22 I1 -- Run [1/6] Observation run number
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Acknowledgements:
J.V. Hernandez Santisteban,
(End) J. Hernandez Santisteban [U. of Southampton], P. Vannier [CDS] 30-Apr-2013