Possible flare star in Bootis
Pat Hall and I are at York University in Toronto, Canada. Pat assigns his students the task of photographing a constellation each fall. He noticed that one photo showed an extra ~5th magnitude star near pi Bootis and omicron Bootis. This potentially is a previously unknown flare star in Bootis which has brightened by >100x!
The student's (Jasvinder Sandal) photos show 3 stars in a row near the bottom center. One image is attached but is unfortunately of relatively poor quality. It was taken with a Sony DSC-W570 18.2 Mpix handheld camera from Brampton, Ontario, Canada: 79.7667 W, 43.6833 N. DS0C1861 was taken on 2012-09-25 20:17:54 (exposure 2 seconds). The top/left star in that row is omicron Bootis, the middle is pi Bootis, and the bottom/right star in the row is the flare star; it is not present in the other photo or in constellation maps of Bootes.
Pat has estimated the position of the new object (dubbed "? Boo") as being the same distance south and west of pi Bootis as pi Bootis is south and west of omicron Bootis. So, in J2000 coordinates:
omi Boo: 14:45:14.46 +16:57:51.4
pi Boo: 14:40:43.57 +16:25:06.0
? Boo: 14:36:34.3 +- :01.1 +15:49:48.2 +- :02.5
Near that position on the sky there are 2 objects of potential interest. 2 arcmin away is LP 440-48, which is a V=17.4 high proper motion star (0.25"/year), and likely a late-type dwarf based on its red colors. 3.5 arcmin away is BD+16 2671, listed in SIMBAD as a V=10 possible F5 star.
Magnitude estimate for ? Boo is V=4.6, based on comparable brightness to omi Boo (V=4.60) but not as bright as pi Boo (a blended binary with V=4.53).