Very Bright New CV discovered at mag 10.6

Sun, 06/15/2014 - 16:29

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 
Mag 10.7

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)


François Teyssier


American Association of Variable Star Observers (AAVSO)


Is there an AUID yet? 

I couldn't find anything in VSX under ASASN-14cl.

Phil Sullivan


American Association of Variable Star Observers (AAVSO)
possible variable near ASASSN-14cl

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.…

Stan Howerton