January 21, 2013: AAVSO observations are requested of the SW Sex-type novalike variable BB Dor in support of one and possibly two sets of multiwavelength observations: Dr. Tomohito Ohshima (Department of Astronomy, Kyoto University) and colleagues have triggered Target of Opportunity observations with NASA's Swift gamma-ray burst satellite, and Dr. Boris Gaensicke (Warwick University) is hoping to observe BB Dor in the ultraviolet with HST.
BB Dor is currently very faint now (<18V), according to observations reported to the AAVSO International Database and elsewhere, which makes it a good time to carry out studies of the white dwarf in the system. Dr. Ohshima and colleagues plan to observe BB Dor on January 23; Dr. Gaensicke's schedule is not set but he has requested good coverage of this low state to help in understanding this system (AAVSO Special Notice #323, http://www.aavso.org/aavso-special-notice-323 ).
BB Dor is very faint in this low state, so visual observations are not feasible. Photometry is requested from now through the end of the observing season.
Coordinates for BB Dor: 05 29 28.64 -58 54 46.6 (2000.0)
Charts may be created using the AAVSO Variable Star Plotter (http://www.aavso.org/vsp ).
Please report observations to the AAVSO International Database as BB DOR.
This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
Subscribing and Unsubscribing may be done at the following URL: