Bursts, which are not Gamma Ray Bursts

The "Pi of the Sky" apparatus continuously monitors the SWIFT FOV.
10 s exposures of a 21^ox 21^o field are taken by two cameras.
Twice a night the whole sky is scanned (24 fields x 2 cameras x 2 exposures x 10s = 50min).
Targets of GCN alerts are also followed automatically.

Limiting magnitude for single images is 12-13^m, whereas for 20 coadded images is 13-14^m (depending on the Moon phase, etc.)

Statistics of "Pi of the Sky" observations: 5 not GRB observed by satellites and us since 2008.09.21, 4 ouside and 1 inside FoV therein.

Observations from INTA and/or SPdA:

Gamma / X-ray satellite observations Optical "Pi of the Sky" observations

INTA SPdA GCN

Burst Source UT RA Dec Error Alert before burst during burst after burst before burst during burst after burst

11 07 02 SGR 1E 1841-045 8:38:38 18^h41^m15^s -04°57′ 3.′00 Swift daytime < 10 s,
< 11.5 mag inside FOV > 68 s,
< 11.5 mag 12105

Gamma / X-ray satellite observations	*Optical "Pi of the Sky"* observations**
INTA	SPdA	GCN
Burst	Source	UT	RA Dec	Error	Alert	before burst	during burst	after burst	before burst	during burst	after burst
11 07 02	SGR 1E 1841-045	8:38:38	18^h41^m15^s -04°57′	3.′00	Swift		daytime		< 10 s, < 11.5 mag	inside FOV	> 68 s, < 11.5 mag	12105

Observations from LCO:

Gamma / X-ray satellite observations Optical "Pi of the Sky" observations

Burst Source UT RA   Dec error alert before burst during burst after burst GCN

09 06 28 IGR 18450-0435   8:06:03 18^h45^m2^s  -4°35′ 3′ Swift outside FOV >677 s, 1 frame: < 11.9^m
20 frames: <11.6^m

08 10 02 H1734-322   1:20:21 17^h45^m51^s  -32°15′ 3′ Swift outside FOV >1111 s, 1 frame: < 11.8^m
20 frames: <12^m

08 09 24 SAX J1808.4-3658   0:37:17 18^h08^m43^s  -36°58′ 3′ Swift outside FOV >871 s, 1 frame: < 11.3^m

08 09 21 IGR J08408-45038   7:55:09 8^h40^m48^s  -45°4′ 3′ Swift outside FOV >95 s, 1 frame: < 11.3^m