ATel 6233 reports the discovery of a very bright transcient by All Sky Automated Survey for SuperNovae (ASAS-SN or"Assassin")
RA (2000) 21:54:57.62
Dec (2000) 26:41:16
I obtained a spectrum on June 15.0 which confirms that the transcient is a dwarf nova in outburst
The spectrum shows a strong blue continuum, narrow component in a broad absorption for H alpha, other Balmer
lines in absorption, He II 4686 in emission
Line at 6929 is a cosme (not removed)
CRTS data shows possible minor outburst(s) in 2012. Unfortunately, the data are sparse. http://nesssi.cacr.caltech.edu/cgi-bin/getcssconedb_id.cgi?ID=112610605…
My photometry from last night had the object around 10.80V. https://www.flickr.com/photos/watchingthesky/14426733224/
Didn't see one here:
ed- There is a sequence, but not for a small FOV such as mine. I read poterrb's post as "is there a new sequence".
Prior to AAVSO creating a comparison star sequence, I had been using stars from the UCAC4 for comparison. Ensemble was used. One of the stars began showing deviation of over 0.2 magnitude relative to the other stars.
This star is UCAC4 583-126503 at RA = 329.0053362, Dec = +26.4080956. It has B = 10.635, V = 10.305, r = 10.303.
A check of VSX was negative. Checking the Catalina Surveys database has the nearest star as CSS_J215601.8+262433. This star shows variation, but is saturated and the position is offset slightly.
I have not taken enough images to use Period04 to see if there is a period.
The NSVS light curve suggest this might be probably an eclipsing variable: http://skydot.lanl.gov/nsvs/star.php?num=8796010&mask=15636
Hi, Stan and Robert,
It turned out to be an Eccentric EA-type variable.
It is now in VSX: