J/ApJ/788/41 BVRI light curve of OGLE LMC-ECL-11893 (Dong+, 2014)
OGLE-LMC-ECL-11893: the discovery of a long-period eclipsing binary with a
circumstellar disk.
Dong S., Katz B., Prieto J.L., Udalski A., Kozlowski S., Street R.A.,
Bramich D.M., Tsapras Y., Hundertmark M., Snodgrass C., Horne K.,
Dominik M., Figuera Jaimes R.
<Astrophys. J., 788, 41 (2014)>
=2014ApJ...788...41D 2014ApJ...788...41D
ADC_Keywords: Binaries, eclipsing ; Stars, variable ; Photometry, CCD
Keywords: binaries: eclipsing - circumstellar matter -
stars: individual: (OGLE-LMC-ECL-11893) - stars: variables: T Tauri -
Herbig Ae/Be
Abstract:
We report the serendipitous discovery of a disk-eclipse system
OGLE-LMC-ECL-11893. The eclipse occurs with a period of 468 days, a
duration of about 15 days, and a deep (up to ΔmI∼1.5),
peculiar, and asymmetric profile. A possible origin of such an eclipse
profile involves a circumstellar disk. The presence of the disk is
confirmed by the H-alpha line profile from the follow-up spectroscopic
observations, and the star is identified as Be/Ae type. Unlike the
previously known disk-eclipse candidates, the eclipses of
OGLE-LMC-ECL-11893 retain the same shape throughout the span of ∼17yr
(13 orbital periods), indicating no measurable orbital precession of
the disk.
Description:
Time-series B, V, R, and I photometry for OGLE-LMC-ECL-11893 from the
LCOGT network of telescopes.
Objects:
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RA (2000) DE Designation(s)
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05 17 21.17 -69 00 55.7 OGLE LMC-ECL-11893 = OGLE LMC-ECL-11893
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 298 CCD time-series B, V, R, and I photometry for
OGLE-LMC-ECL-11893 from the LCOGT (Las Cumbres
Observatory Global Telescope Network, CA)
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See also:
J/AcA/61/103 : VI light curves of LMC eclipsing binaries (Szymanski+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- TelName LCOGT site/dome/telescope/instrument code
22 A1 --- Flt [BVRI] Observation filter
24- 36 F13.5 d HJD [2456343/2456373] Heliocentric Julian date
at mid-exposure
38- 43 F6.3 mag mag Instrumental magnitude in Flt filter
45- 49 F5.3 mag e_mag Magnitude uncertainty
51- 56 F6.3 s-1 Fref Reference flux (in ADU/s unit)
58- 62 F5.3 s-1 e_Fref Reference flux uncertainty (in ADU/s unit)
64- 71 F8.3 s-1 DFlux Difference flux (in ADU/s unit)
73- 77 F5.3 s-1 e_DFlux Difference flux uncertainty (in ADU/s unit)
79- 84 F6.4 --- p Photometric scale factor
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Acknowledgements:
Daniel Bramich, dan.bramich(at)hotmail.co.uk
(End) Daniel Bramich [QEERI, Qatar], Patricia Vannier [CDS] 07-Jul-2014