Swift Trigger: 796778;

Presumed name: GRB 171212A

BAT	19^h 35^m 36.00^s, +20° 34′ 04.8″
position:	(293.900, 20.568 ± 180″)
XRT	19^h 35^m 40.38^s, +20° 35′ 29.7″
position:	(293.91826, 20.59159 ± 3.9″)
UVOT	No position available.
Galactic N_HI:	1.09×10⁰ cm^-2
Galactic E(B-V):	6.694 mag

Best RA:	19^h 35^m 40.38^s	= 293.91826 d
Best Dec:	+20° 35′ 29.7″	= 20.59159 d

Gal Lat:	0.03
Gal Long:	56.19

Sun angle:	55.02°, -2.3 hr East of Sun

¹Sper #2 auto processing.

Galaxies within 3.33 of XRT position

	RA*	Dec*		Catalogue
10.0	293.9179	20.5944		NED
18.9	293.9133	20.5944		NED
18.9	293.9136	20.5945	I=17.1, R1=18.9, R2=18.9	USNO-B1
20.5	293.9200	20.5969		NED
28.4	293.9112	20.5961		NED
28.6	293.9250	20.5961		NED
28.9	293.9225	20.5983		NED
31.6	293.9189	20.5828	I=18.2, R2=19.7	USNO-B1
31.9	293.9158	20.6002	I=18.5, R1=18.9, R2=19.5	USNO-B1
32.4	293.9229	20.5994		NED
32.6	293.9104	20.5969		NED
35.0	293.9249	20.5991	I=18.3, R2=19.2	USNO-B1
37.3	293.9134	20.5823	B1=20.2, B2=20.2, I=17.3, R1=18.5, R2=17.4	USNO-B1
38.1	293.9267	20.5986		NED
40.0	293.9279	20.5981	I=18.6, R2=19.8	USNO-B1
41.0	293.9078	20.5859	R1=18.8, R2=20.1	USNO-B1
43.2	293.9308	20.5886		NED
43.8	293.9072	20.5979	I=17.9, R1=19.5, R2=20.1	USNO-B1
45.8	293.9287	20.5994		NED
46.3	293.9307	20.5862	B1=20.6, I=17.9, R2=19.7	USNO-B1
49.6	293.9302	20.5996	I=17.8, R1=18.9, R2=19.1	USNO-B1
50.0	293.9312	20.5986		NED
52.5	293.9046	20.5846	B2=20.5, I=18.4, R1=18.6, R2=19.5	USNO-B1
52.7	293.9319	20.5988	B1=20.3, B2=19.5, I=15.7, R1=16.9, R2=16.9	USNO-B1
55.0	293.9017	20.5911		NED
56.1	293.9321	20.6003		NED
56.6	293.9324	20.6001	B1=20.5, I=18.0, R1=18.8, R2=19.3	USNO-B1
60.0	293.9353	20.5966	B2=20.4, I=15.6, R1=17.9, R2=17.5	USNO-B1
61.6	293.9000	20.5928		NED
61.8	293.9363	20.5884	I=16.8, R1=18.3, R2=18.8	USNO-B1
61.9	293.9001	20.5889	B1=20.1, I=14.7, R2=16.2	USNO-B1
62.0	293.9000	20.5906		NED
62.4	293.8998	20.5903	I=16.4, R2=17.4	USNO-B1
62.4	293.8999	20.5892	B1=19.4, B2=18.9, R1=15.9	USNO-B1
63.8	293.9018	20.5828	B2=20.5, R1=19.5, R2=19.6	USNO-B1
64.4	293.8996	20.5869		NED
65.4	293.8995	20.5871	B1=20.2, B2=20.2, I=16.1, R1=18.4, R2=17.7	USNO-B1
65.7	293.8992	20.5947		NED
67.5	293.8999	20.5840	B2=20.3, I=17.4, R2=17.3	USNO-B1
67.9	293.9383	20.5898	I=16.6, R1=18.2, R2=18.6	USNO-B1
68.5	293.8996	20.5836		NED
68.7	293.8986	20.5864	I=16.3, R1=18.2, R2=18.4	USNO-B1
69.2	293.8983	20.5861		NED
72.2	293.9367	20.6019		NED
72.7	293.8983	20.5842		NED
73.8	293.9396	20.5878		NED
77.2	293.9350	20.6061		NED
78.7	293.9346	20.6072		NED
79.6	293.9412	20.5872		NED
80.0	293.8958	20.5842		NED
81.2	293.9329	20.5739		NED
81.8	293.9423	20.5885	I=16.7, R2=17.0	USNO-B1
82.0	293.9246	20.5697		NED
83.2	293.8937	20.5900		NED
83.5	293.9004	20.5756		NED
83.9	293.9429	20.5886		NED
84.0	293.8975	20.5786		NED
84.1	293.8933	20.5917		NED
84.4	293.9400	20.6028		NED
85.7	293.9308	20.5708		NED
86.6	293.9000	20.5747		NED
88.1	293.9355	20.6100	I=18.3, R2=19.7	USNO-B1
88.7	293.9200	20.5669		NED
92.2	293.9287	20.5681		NED
93.5	293.8917	20.5997		NED
95.9	293.9146	20.5653		NED
95.9	293.9342	20.6136		NED
97.0	293.9442	20.5803		NED
97.1	293.9275	20.5661		NED
97.9	293.8892	20.5933		NED
99.0	293.9334	20.5680	I=16.4, R2=20.1	USNO-B1
99.6	293.9333	20.5678		NED
99.9	293.9102	20.6183	B2=20.4, I=18.4, R1=19.0, R2=19.4	USNO-B1
99.9	293.9417	20.6086	I=16.4, R1=19.0, R2=18.6	USNO-B1
100.0	293.9346	20.5684	I=17.7, R2=19.9	USNO-B1
100.8	293.9053	20.5663	B1=20.3, B2=19.9, I=17.5, R1=18.1, R2=17.9	USNO-B1
104.8	293.9379	20.5690	B2=20.5, I=17.6, R1=18.8, R2=18.9	USNO-B1
104.8	293.9379	20.5692		NED
105.2	293.9479	20.5826	B2=20.4, I=17.9, R1=18.6, R2=18.8	USNO-B1
106.0	293.9437	20.5744		NED
106.9	293.9192	20.5619		NED
107.5	293.9448	20.5750	B1=19.7, B2=19.7, R1=16.8, R2=16.5	USNO-B1
107.6	293.9487	20.6006		NED
108.0	293.9304	20.5639		NED
108.6	293.9450	20.5750		NED
109.9	293.9142	20.5614		NED
110.7	293.9389	20.5677	I=18.2, R2=19.9	USNO-B1
111.4	293.9496	20.6017		NED
113.4	293.9474	20.5759	I=16.9, R1=19.0, R2=19.1	USNO-B1
114.1	293.9479	20.6064		NED
115.1	293.8900	20.6100		NED
115.6	293.9442	20.5706		NED
116.3	293.8838	20.5922		NED
117.4	293.9376	20.6187	B1=20.7, I=18.0, R2=19.1	USNO-B1
117.8	293.9046	20.5614		NED
118.3	293.9508	20.6039		NED
118.4	293.9517	20.6019		NED
118.7	293.9372	20.6194	I=17.1, R1=19.0, R2=19.4	USNO-B1
120.2	293.9517	20.6025		NED
121.6	293.8879	20.6097		NED
122.5	293.9534	20.6003	I=17.7, R2=19.6	USNO-B1
122.5	293.9312	20.5598	R1=18.7, R2=19.9	USNO-B1
123.2	293.9223	20.5576	B2=20.3, I=17.6, R1=18.7, R2=18.6	USNO-B1
124.0	293.9265	20.5580	B2=19.7, I=17.6, R1=17.8, R2=18.0	USNO-B1
124.5	293.9227	20.5572	I=17.5, R1=18.5, R2=18.6	USNO-B1
124.6	293.9479	20.5711		NED
124.9	293.9266	20.5578	B2=19.8, I=17.5, R2=18.2	USNO-B1
127.3	293.9033	20.5592		NED
128.6	293.9504	20.5722		NED
128.6	293.9362	20.6231		NED
130.3	293.9534	20.6068	B1=20.1, B2=20.4	USNO-B1
130.4	293.9518	20.6097	I=15.7, R1=18.3, R2=18.4	USNO-B1
130.7	293.9521	20.6094		NED
131.8	293.9517	20.6106	R1=17.5, R2=17.4	USNO-B1
132.6	293.9518	20.6108	B1=20.5, B2=19.7, I=16.4, R1=17.9, R2=17.4	USNO-B1
133.4	293.9569	20.5995	I=17.4, R2=18.9	USNO-B1
133.5	293.8822	20.6070	B2=20.0, R2=18.1	USNO-B1
133.5	293.9269	20.5554	R1=19.0, R2=19.8	USNO-B1
133.9	293.8904	20.6181		NED
134.2	293.9427	20.5622	I=17.8, R1=19.0, R2=19.0	USNO-B1
136.6	293.9117	20.6289		NED
137.2	293.9321	20.6275		NED
137.5	293.9567	20.6042		NED
138.2	293.9262	20.5539	B1=19.0, B2=17.6, I=15.5, R1=16.4, R2=16.4	USNO-B1
138.9	293.9474	20.6189	B2=20.2, I=17.3, R1=18.6, R2=18.5	USNO-B1
139.0	293.9465	20.6197	B2=19.6, I=17.2, R1=17.9, R2=17.1	USNO-B1
139.1	293.9471	20.6192	I=16.4, R1=17.4	USNO-B1
139.1	293.9042	20.5553		NED
139.3	293.9043	20.5552	I=16.9, R1=18.7, R2=18.8	USNO-B1
140.1	293.9469	20.6198	I=16.7, R1=17.1	USNO-B1
142.3	293.9533	20.5697		NED
142.8	293.9308	20.6294		NED
143.2	293.8758	20.5875		NED
143.5	293.9424	20.5587	I=18.1, R1=18.8	USNO-B1
144.3	293.8772	20.6029	B1=20.3, I=18.6	USNO-B1
146.6	293.8746	20.5908		NED
148.9	293.9550	20.5689		NED
149.7	293.8896	20.6233		NED
151.0	293.9417	20.6275		NED
152.3	293.9328	20.5515	B1=15.1, B2=14.8	USNO-B1
152.5	293.9471	20.5592		NED
152.6	293.9079	20.5503		NED
153.6	293.9617	20.5788	B2=20.3, I=18.2, R1=18.7, R2=19.0	USNO-B1
154.1	293.9588	20.5719		NED
155.0	293.9600	20.6094		NED
157.5	293.8888	20.5576	I=17.9, R2=19.6	USNO-B1
157.6	293.8888	20.5575		NED
160.8	293.9612	20.5721	B2=20.5, R2=19.9	USNO-B1
162.8	293.9638	20.6064		NED
162.8	293.9317	20.6350		NED
163.4	293.9274	20.6362	I=17.2, R1=18.8, R2=18.9	USNO-B1
163.7	293.8867	20.6264		NED
163.9	293.9353	20.6342	B1=20.4, B2=19.4, I=16.8, R1=18.0, R2=17.8	USNO-B1
164.5	293.8888	20.6281		NED
165.7	293.8692	20.5861		NED
167.0	293.8865	20.6272	I=17.8, R1=18.9, R2=18.3	USNO-B1
167.0	293.9665	20.5810	I=16.5, R2=19.3	USNO-B1
167.0	293.8687	20.5875		NED
167.5	293.8829	20.5589		NED
168.2	293.8684	20.5889	B1=20.1, B2=19.7, I=17.5, R1=18.0, R2=17.7	USNO-B1
168.4	293.9674	20.5831	B1=20.5, R2=18.2	USNO-B1
168.5	293.9658	20.6061		NED
169.3	293.8751	20.6157	I=18.5, R2=20.4	USNO-B1
170.0	293.8721	20.5726	I=16.9, R2=18.9	USNO-B1
170.3	293.8709	20.5750	I=17.6, R1=19.6, R2=19.3	USNO-B1
170.5	293.8677	20.5944	B2=20.1, I=17.6, R1=18.7, R2=18.8	USNO-B1
171.4	293.9599	20.6190	B2=20.3, I=15.2, R1=16.9, R2=17.1	USNO-B1
172.5	293.8673	20.5956	I=18.6, R1=19.6, R2=19.7	USNO-B1
173.1	293.9559	20.6244	I=17.7, R1=18.9, R2=19.2	USNO-B1
173.5	293.9659	20.6099	I=18.1, R1=19.0, R2=19.3	USNO-B1
174.0	293.9190	20.6399	B2=19.8, I=17.3, R1=16.9, R2=17.6	USNO-B1
176.3	293.9436	20.6344	B1=20.8, B2=20.2, I=17.7, R1=18.3, R2=18.9	USNO-B1
176.5	293.8888	20.6322		NED
176.9	293.8716	20.6141	I=17.4, R1=19.5	USNO-B1
177.1	293.9603	20.5620	I=17.8, R2=19.9	USNO-B1
178.4	293.8654	20.5861		NED
178.9	293.8669	20.5790	B1=20.3, I=17.6, R1=18.1	USNO-B1
180.1	293.9716	20.5881	B2=19.5, R1=18.7, R2=18.0	USNO-B1
180.8	293.9710	20.5826	B2=20.1, I=17.9, R1=18.3, R2=18.9	USNO-B1
182.0	293.9717	20.5841	B2=20.4, I=17.8, R1=18.7, R2=17.9	USNO-B1
182.0	293.9689	20.6092	B1=14.0, R2=19.5	USNO-B1
182.4	293.9723	20.5881	B2=20.2, R2=18.7	USNO-B1
182.4	293.8998	20.6393	B2=20.5, R2=20.1	USNO-B1
182.9	293.8792	20.5564		NED
183.1	293.8821	20.5536		NED
184.0	293.9717	20.6014		NED
184.2	293.9679	20.5700		NED
185.0	293.9700	20.6089		NED
185.0	293.8783	20.5563	I=17.4, R2=19.9	USNO-B1
185.2	293.9133	20.6428		NED
185.6	293.9075	20.5411		NED
185.7	293.9721	20.5804	I=17.9, R2=19.6	USNO-B1
186.6	293.9421	20.5448	B1=19.4, I=18.1, R2=19.2	USNO-B1
186.7	293.9737	20.5906		NED
187.0	293.9714	20.5768	I=17.8, R2=20.0	USNO-B1
187.1	293.9712	20.5758		NED
188.5	293.9421	20.5442		NED
190.0	293.9383	20.5422		NED
191.9	293.9656	20.5620	I=18.1, R2=18.5	USNO-B1
193.8	293.9580	20.5527	I=17.0, R2=19.0	USNO-B1
195.2	293.9392	20.5411		NED
195.5	293.8975	20.5408		NED
195.7	293.9404	20.5414		NED
195.8	293.9629	20.5568	I=17.7, R2=19.1	USNO-B1
198.0	293.9175	20.6467		NED
198.5	293.9754	20.5783		NED
198.6	293.8602	20.6009	I=18.1, R2=20.3	USNO-B1
198.8	293.8600	20.5836		NED
199.7	293.8665	20.6186	I=17.9, R2=19.8	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