V434 Aur In Outburst!
Thom Gandet
Lizard Hollow Observatory, PO Box 89175, Tucson AZ 85745-9175
email: tlglhobs(==>)comcast.net
Received: Apr 3, 2007; Accepted: Apr 5, 2007
Dear Be-star colleagues,
The variable Be star V434 Aur was observed to be in outburst on 01 April 2007 UT, at V=7.106 ± 0.008 mag (s.e. of four CCD images). On 03 April 2007 UT, the magnitude was virtually unchanged from 01 April. The CCD observations were made with the 0.3-m SCT at the Lizard Hollow Observatory, Tucson, AZ USA.
The most recently reported outburst was observed by the Hipparcos satellite in January 1992, at V~7.14. Since the Hp magnitude is very nearly equal to V at B-V=0.07, which is the mean of published B-V for V434 Aur, the current outburst is roughly the equal of that seen by Hipparcos. The minimum magnitude observed by Hipparcos was V~7.28. Published photometry, from a variety of sources, ranges between V~7.1 and V~7.3.
No contemporaneous spectroscopy and photometry could be found in the necessarily time-limited literature search conducted by the present author. However, the rate of decline from maximum seen in the Hipparcos light curve was ~0.05 magnitude in ~50 days. It therefore seems prudent to obtain spectroscopy, and additional photometry, of V434 Aur as soon as possible.
Sincerely,
Thom Gandet
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