J/A+A/557/A77 VR light curves of AA Tau in 2007-2013 (Bouvier+, 2013)
AA Tauri's sudden and long-lasting deepening: enhanced extinction by its
circumstellar disk.
Bouvier J., Grankin K., Ellerbroek L., Bouy H., Barrado D.
<Astron. Astrophys. 557, A77 (2013)>
=2013A&A...557A..77B 2013A&A...557A..77B
ADC_Keywords: Stars, pre-main sequence ; Stars, variable ; Photometry
Keywords: accretion, accretion disks - stars: individual: AA Tau -
stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be
Abstract:
AA Tau has been monitored for more than 20 years since 1987,
exhibiting a nearly constant brightness level of V=12.5mag. We report
here that in 2011 it suddenly faded away, becoming 2 magnitudes
fainter in the V-band, and has remained in this deep state since then.
We investigate the origin of the sudden dimming of the AA Tau system.
We report new optical and near-IR photometry and spectroscopy obtained
during the fading event.
Description:
Optical observations of AA Tau were obtained at the Crimean
Astrophysical Observatory (CrAO) from October 2007 to February 2013.
Additional BVRcIc photometry was obtained on December 23, 2011 using
the Cafos focal reducer in direct imaging mode with CCD SITE1d 15 on
the 2.2m Calar Alto Telescope.
Objects:
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RA (2000) DE Designation(s)
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04 34 55.42 +24 28 53.2 AA Tau = V* AA Tau
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
aatau.dat 30 183 AA Tau photometric measurements obtained at
Crimean Astrophysical Observatory from 2007 to 2013
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See also:
J/A+A/349/619 : UBVRI light curves of AA Tau in 1995 (Bouvier+, 1999)
J/A+A/409/169 : UBVRI light curves of AA Tau in 1999 (Bouvier+, 2003)
J/A+A/463/1017 : B and V light curves of AA Tau (Bouvier+, 2007)
Byte-by-byte Description of file: aatau.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 19 F6.3 mag Vmag Johnson V magnitude
21- 25 F5.3 mag V-R ?=9.999 Johnson (V-R) color index
27- 30 A4 --- Obs Observation at Maidanak or CrAO (maid or crao)
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Acknowledgements:
Jerome Bouvier, jbouvier(at)obs.ujf-grenoble.fr
(End) Patricia Vannier [CDS] 05-Apr-2013