Affiliation
American Association of Variable Star Observers (AAVSO)
Tue, 05/14/2019 - 19:25
AAVSO Alert Notice 666 announces an observing campaign of confirmation and follow-up observations beginning immediately on the potential CV CRTS J105122.8+672528. Please see the Alert Notice for details and observing instructions.
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
Tonight on the first image I took (120 sec integration) the star is about 15.4 V.
Will go to 60 sec and a couple of hours of data. 14 inch scope with C filter.
Don Collins (CDK)
Hi Don,
Hope the data turned out well, am looking forward to seeing it.
Mark
Last night I obtained 63 Cousins I observations (180-sec) (0.32m Planewave CDK + SBIG STL1001E CCD) from urban Washington DC from 2458618.56690 - 2458618.72377 . Mean mag. 15.59 +- 0.05. AAVSO Seq. X24423GD. Not enough data for period analysis yet. Submitted to WebObs.
Richard Schmidt (SREB)
The variable has diminished considerably in brightness tonight, estimate 16.54 +- 0.17 in I band.
Rich Schmidt (SREB)
Hi Richard,
I'm surprised that it's fading so rapidly. Perhaps this isn't a super outburst, but just a regular outburst. Still worth keepin an eye one - there can be outbursts that trigger super outbursts. Also, there's hints of variability in the I band data posted 2 days ago, so confirming that would be incredibly useful.
Cheers,
Mark
CRTS J105122.8+672528 observations needed urgently
The 24-inch Rapid Response Robotic Telescope (RRRT) at the University of Virginia Fan Mountain Observatory was used under intermittent cloud condiions using the V filter on the night of 2019 May16 from 03:12:50 to 04:06:23 UTC to capture a series of images with 45s exposures. There is some short-term variability indicated Using the 151 comparison the mean V magnitude of the variable is 16.73 +/- 0.024. A B-V of -0.06 +/- 0.11 is indicated.
I need a "bigger telescope" and better weather!
Jim DeYoung (DEY)
Dr. Mark Kennedy informs us that the outburst of CRTS J105122.8+672528 was very short lived and, as the system has faded to magnitude 18 (apparently it was a regular outburst despite its very high amplitude), no additional observations are required. He thanks all contributing observers for their timely and valuable observations of this system.
Best wishes and Good observing,
Elizabeth