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Special Notice #60: Upcoming primary eclipse of ASAS182612

August 20, 2007: As described in Alert Notice 351, we are running an extended campaign on the newly discovered eclipsing Cepheid ASAS 182611+1212.6. Doug Welch has reminded me that the primary eclipse is predicted to be around August 28 around 0130UT. However, the eclipses are many days long, and the binary light curve is continuously changing, so don't just observe on the 28th.

To get good coverage of the primary eclipse, we suggest obtaining a CCD dataset once per hour (optimal, but less frequent is also ok) from August 23 until September 3 UT, so as to follow ingress and egress. If you can do multiple filter observation datasets, that would be even better.

Coordinates (2000):  R.A. 18:26:11.50    Dec. +12:12:35.0 (+/- 100mas)

Submit your data as:   1821+12B ASAS182612

Arne

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