Swift Trigger: 544347;

Presumed name: GRB 121229A

BAT	12^h 40^m 24.00^s, -50° 35′ 38.4″
position:	(190.100, -50.594 ± 180″)
XRT	12^h 40^m 24.22^s, -50° 35′ 38.4″
position:	(190.1009, -50.5940 ± 2.8″)
UVOT	No position available.
Galactic N_HI:	1.35×10²¹ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	12^h 40^m 24.22^s	= 190.1009 d
Best Dec:	-50° 35′ 38.4″	= -50.5940 d

Gal Lat:	12.24
Gal Long:	301.14

Sun angle:	71.21°, 5.9 hr West

¹Sper #2 auto processing.

Galaxies within 3.33 of XRT position

	RA*	Dec*		Catalogue
9.0	190.1033	-50.5960	B=18.9, R2=17.5, i=17.3	SSS
9.1	190.1003	-50.5965	B=21.5	SSS
17.5	190.0939	-50.5959	B=20.5, R2=19.2	SSS
32.2	190.0882	-50.5901	B2=20.0, R1=19.7, R2=19.1	USNO-B1
38.8	190.1095	-50.5847	B2=18.3, I=17.4, R1=17.8, R2=16.9	USNO-B1
38.9	190.1096	-50.5847	B=19.1, R2=17.9, i=17.4	SSS
41.0	190.1025	-50.5826	B=21.6	SSS
42.3	190.1121	-50.5846	B2=17.1, I=16.3, R1=16.5, R2=16.4	USNO-B1
43.4	190.1195	-50.5916	B=21.4, R2=19.8	SSS
45.2	190.0925	-50.6054	B=22.3	SSS
52.3	190.0894	-50.6066	B2=20.4, I=18.4, R1=19.1, R2=18.8	USNO-B1
52.4	190.0895	-50.6066	B=20.8, R2=19.3	SSS
56.1	190.1197	-50.5840	B=20.3, R2=19.1, i=18.4	SSS
68.3	190.0835	-50.5786	B=20.7, R2=19.2	SSS
71.7	190.0737	-50.6039	B2=17.0, I=15.5, R1=16.0, R2=16.0	USNO-B1
72.7	190.0739	-50.6046	I=17.5, R1=19.0, R2=18.6	USNO-B1
74.8	190.1302	-50.5847	B=21.0, R2=19.9	SSS
84.6	190.0834	-50.6147	B=19.3, R2=17.9, i=17.5	SSS
85.0	190.0845	-50.6152	B2=18.4, I=16.1, R1=16.9, R2=16.8	USNO-B1
85.4	190.0846	-50.6153	B=19.3, R2=17.7, i=17.0	SSS
88.9	190.1142	-50.5708	B2=21.4, R1=19.8, R2=18.8	USNO-B1
89.1	190.1045	-50.6187	B2=18.6, R1=18.8	USNO-B1
89.7	190.0702	-50.5785	B2=18.7, I=17.3, R1=17.7, R2=17.3	USNO-B1
90.1	190.0634	-50.5862	B=22.0, i=18.6	SSS
90.9	190.1059	-50.5689	B2=18.8, I=17.3, R1=17.5, R2=17.1	USNO-B1
91.9	190.1366	-50.5823	B2=20.8, R1=19.7	USNO-B1
92.7	190.0853	-50.5702	B2=19.9, R1=18.4, R2=18.4	USNO-B1
92.9	190.1046	-50.6197	B2=16.1, I=14.6, R1=15.3, R2=14.9	USNO-B1
101.0	190.0646	-50.5780	I=17.7, R1=18.5	USNO-B1
102.6	190.1153	-50.5670	B=21.3, R2=19.6, i=18.5	SSS
102.9	190.1153	-50.5669	I=18.5, R1=19.6	USNO-B1
106.7	190.1474	-50.5915	B2=20.8, R1=19.7, R2=19.2	USNO-B1
109.3	190.0687	-50.6164	B2=20.8, I=18.6	USNO-B1
109.5	190.1488	-50.5955	B2=20.9, R1=19.4	USNO-B1
111.2	190.0986	-50.5631	B2=19.1, I=17.2, R1=17.9, R2=16.9	USNO-B1
111.9	190.1332	-50.5707	B2=16.8, I=15.3, R1=15.8, R2=15.8	USNO-B1
114.1	190.1388	-50.6146	B=19.5, R2=18.2, i=17.7	SSS
115.7	190.0523	-50.5851	B=20.7, R2=20.0, i=18.3	SSS
117.1	190.0845	-50.6248	I=18.2, R1=19.4, R2=19.1	USNO-B1
120.7	190.1136	-50.5615	B2=17.6, I=16.6, R1=16.6, R2=16.1	USNO-B1
121.8	190.0822	-50.6257	B=21.9	SSS
124.2	190.1010	-50.6285	B=20.4, R2=19.3, i=19.0	SSS
127.3	190.1131	-50.6285	B2=19.5, I=17.9, R1=17.8, R2=17.9	USNO-B1
128.9	190.0788	-50.5611	R1=19.3, R2=19.2	USNO-B1
129.8	190.0793	-50.5607	B=19.9, R2=18.8, i=18.5	SSS
132.5	190.1589	-50.5930	I=18.0, R2=19.1	USNO-B1
133.6	190.0478	-50.6096	B=20.4, R2=19.8	SSS
134.1	190.1061	-50.6311	B=22.1, i=18.8	SSS
134.5	190.1390	-50.5655	B2=20.2, I=18.2, R1=19.2	USNO-B1
135.3	190.1007	-50.5564	B2=20.4, R1=19.7, R2=19.2	USNO-B1
138.1	190.0785	-50.6296	B=20.4, R2=19.3, i=18.7	SSS
140.3	190.1540	-50.5745	B2=17.6, I=16.3, R1=16.8, R2=16.1	USNO-B1
142.3	190.1550	-50.5744	B2=17.9, I=16.5, R1=17.1, R2=16.0	USNO-B1
143.1	190.0383	-50.5949	B2=17.3, I=16.0, R1=16.5, R2=15.8	USNO-B1
144.6	190.0461	-50.6141	B2=20.6, R2=19.0	USNO-B1
144.9	190.1604	-50.5801	B2=19.1, I=18.2, R1=18.4	USNO-B1
144.9	190.0753	-50.5572	R1=19.4, R2=19.4	USNO-B1
145.0	190.0650	-50.5608	B2=20.5, R1=19.8, R2=18.9	USNO-B1
145.8	190.0873	-50.6336	B2=19.6, I=17.3, R1=18.6, R2=18.4	USNO-B1
146.2	190.0555	-50.6226	B=21.7	SSS
146.2	190.1612	-50.5805	B2=19.4, R1=19.2, R2=18.6	USNO-B1
146.4	190.0772	-50.5562	B=21.7, R2=20.3	SSS
146.5	190.0482	-50.6172	B=21.7, R2=20.1	SSS
147.2	190.1618	-50.5806	B=20.4	SSS
147.7	190.0374	-50.5864	B2=21.5, R1=19.3	USNO-B1
148.0	190.1575	-50.6139	B2=20.9, I=18.3, R1=19.8	USNO-B1
149.6	190.0354	-50.5940	B2=17.0, I=15.2, R1=15.7, R2=15.5	USNO-B1
150.1	190.0354	-50.5910	B=19.7, R2=18.5, i=17.8	SSS
151.1	190.0475	-50.5693	B=21.7	SSS
152.0	190.0537	-50.6237	B2=19.6, I=18.0, R1=18.9, R2=18.4	USNO-B1
152.4	190.0531	-50.6235	B=19.1, R2=17.9, i=17.8	SSS
152.7	190.0357	-50.5847	B=20.8, R2=18.8, i=18.1	SSS
152.9	190.1065	-50.6363	I=17.7, R2=18.4	USNO-B1
153.1	190.1076	-50.6363	I=17.7, R1=18.9, R2=19.2	USNO-B1
154.8	190.0343	-50.6017	B2=17.4, I=15.6, R1=16.0, R2=15.9	USNO-B1
156.8	190.0879	-50.6368	B2=15.3, I=14.1, R1=14.3	USNO-B1
157.3	190.0482	-50.5659	B=19.3, R2=17.8, i=17.4	SSS
157.5	190.1465	-50.6268	R1=19.9, R2=19.2	USNO-B1
157.5	190.0482	-50.5658	B2=18.4, I=17.6, R1=17.6, R2=17.2	USNO-B1
158.3	190.0502	-50.6240	B=21.8	SSS
159.1	190.1559	-50.5669	B2=21.3, I=18.5, R1=19.5, R2=19.1	USNO-B1
159.2	190.1365	-50.6320	B2=21.0, R1=19.6	USNO-B1
162.3	190.0524	-50.5611	B=20.7, R2=19.5, i=18.6	SSS
162.4	190.0465	-50.5650	B2=18.1, I=16.7, R1=16.9, R2=16.7	USNO-B1
164.3	190.1661	-50.6132	R1=19.2, R2=18.5	USNO-B1
164.3	190.0718	-50.5523	R1=20.0, R2=19.4	USNO-B1
164.9	190.0601	-50.6318	B=20.0, R2=18.9, i=18.2	SSS
165.8	190.0476	-50.5628	B2=20.6, R1=19.6, R2=19.1	USNO-B1
166.1	190.1046	-50.5481		NED
166.8	190.1593	-50.6218	B2=20.3, I=18.4, R1=19.1, R2=18.9	USNO-B1
167.4	190.1115	-50.6400	I=16.8, R1=18.9, R2=17.9	USNO-B1
167.5	190.0590	-50.5558	B2=20.9, R1=19.9, R2=19.2	USNO-B1
168.0	190.1637	-50.5697	B2=20.5, I=18.5, R1=19.5, R2=19.4	USNO-B1
168.2	190.0748	-50.5503	B2=20.9, R2=19.1	USNO-B1
168.7	190.1709	-50.6090	B2=20.2, R1=19.2, R2=18.8	USNO-B1
169.1	190.0321	-50.5767	B=21.4	SSS
169.8	190.0322	-50.5761	B2=21.5, R1=19.8	USNO-B1
169.8	190.0391	-50.6202	B2=20.1, R1=19.1	USNO-B1
169.9	190.1544	-50.5612	B=20.1, R2=19.0, i=17.8	SSS
170.5	190.0451	-50.6255	B2=20.4, R2=19.1	USNO-B1
170.9	190.0421	-50.6234	B2=18.2, I=17.3, R1=18.6, R2=16.6	USNO-B1
172.0	190.0419	-50.6237	B=19.7, R2=18.7	SSS
173.5	190.1191	-50.6408	B2=21.0, R2=19.2	USNO-B1
174.1	190.0400	-50.6230	B2=18.5, I=16.5, R1=17.1, R2=17.0	USNO-B1
174.1	190.0400	-50.6231	B=19.1, R2=17.5, i=16.6	SSS
175.1	190.0282	-50.6094	B2=20.8, R2=19.3	USNO-B1
180.0	190.0957	-50.5441	B2=20.3, R1=18.8, R2=19.1	USNO-B1
183.9	190.1778	-50.5790	B=22.2	SSS
185.0	190.1817	-50.5907	B2=20.2, R2=19.2	USNO-B1
188.9	190.1118	-50.6460	B2=20.8, R2=19.4	USNO-B1
190.6	190.1690	-50.5634	B=21.6	SSS
191.9	190.0173	-50.5989	R1=18.5, R2=18.4	USNO-B1
192.0	190.0250	-50.5712	B2=21.1, R1=19.3	USNO-B1
193.4	190.1705	-50.6246	B2=17.7, I=16.8, R1=17.6	USNO-B1
194.8	190.1740	-50.5662	B2=18.4, I=16.7, R1=16.9, R2=17.0	USNO-B1
199.0	190.1627	-50.6330	B2=21.1, R1=19.4	USNO-B1

Queried APM-N, SDSS, PSCz, SSS, NED, 2MASSX, USNO-B1.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example