OT080718

During the night 18/19.07.2008 "Pi of the Sky" experiment detected an optical transient at least 120 s long.

Frame 2369, event 0 Camera k2a Camera k2b

Flash date (UT): 2008.07.19, 09:44:59 2008.07.19, 09:44:58

Flash date (local LCO): 2008.07.19, 5:44:59 2008.07.19, 5:44:58

Flash (ra,dec):
(1 arcmin/pixel, North up) 02h02m11.80s, 20^o6'43"
2.03661h, 20.1121^o 02h02m11.10s, 20^o6'47"
2.03642h, 20.1133^o

Flash (x,y): 1930, 994 1880, 1014

Prev/flash/next intensity: 122 / 912 / 353 98 / 807 / 110

Preliminary lightcurve:

Frame Time UT mag

-1 9:44:46-9:44:5 >12^m limit

0 9:45:00-9:45:10 10.69 ±0.14

1 9:45:12-9:45:22 11.64 ±0.23

2-5 9:45:24-9:46:25 11.92 ±0.13

6-9 9:46:27-9:47:03 12.10 ±0.16

10-17 9:47:05-9:48:31 12.38 ±0.24

According to Taichi Kato and Brian Skiff from VSNET this might be a flare of USNO1050.00569325 020206.296 +200658.55 (2000.0) 15.6 19.0 2MASS 020206.533 +200656.05 (2000.0) 12.082 11.503 11.229 The significant proper motion (~0".1/year) and 2MASS J-K color of 0.85 both indicate that the suggested star is an M dwarf, consistent with the flare-star interpretation.

SIMBAD map

Frame 2369, event 0	Camera k2a	Camera k2b
Flash date (UT):	2008.07.19, 09:44:59	2008.07.19, 09:44:58
Flash date (local LCO):	2008.07.19, 5:44:59	2008.07.19, 5:44:58
Flash (ra,dec): (1 arcmin/pixel, North up)	02h02m11.80s, 20^o6'43" 2.03661h, 20.1121^o	02h02m11.10s, 20^o6'47" 2.03642h, 20.1133^o
Flash (x,y):	1930, 994	1880, 1014
Prev/flash/next intensity:	122 / 912 / 353	98 / 807 / 110

Frame	Time UT	mag
-1	9:44:46-9:44:5	>12^m limit
0	9:45:00-9:45:10	10.69 ±0.14
1	9:45:12-9:45:22	11.64 ±0.23
2-5	9:45:24-9:46:25	11.92 ±0.13
6-9	9:46:27-9:47:03	12.10 ±0.16
10-17	9:47:05-9:48:31	12.38 ±0.24