Swift Trigger: 361830;

Presumed name: GRB 090904A

BAT	06^h 43^m 31.68^s, +50° 12′ 21.6″
position:	(100.882, +50.206 ± 180″)
XRT	06^h 43^m 32.59^s, +50° 12′ 13.7″
position:	(100.8858, 50.2038 ± 2.3″)
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.099 mag

Best RA:	06^h 43^m 32.59^s	= 100.8858 d
Best Dec:	+50° 12′ 13.7″	= 50.2038 d

Gal Lat:
Gal Long:

Sun angle:	not found

Galaxies within 3.33 of XRT position

	RA*	Dec*		Catalogue
9.7	100.8817	50.2039		NED
24.4	100.8959	50.2018	B1=20.8, R1=19.1	USNO-B1
44.7	100.8842	50.1914	B1=20.2, B2=19.9, I=18.4, R1=18.7, R2=18.7	USNO-B1
45.5	100.8944	50.1924	B=21.3, R=18.2	APM-N
45.7	100.8844	50.1911	B=19.9, R=18.4	APM-N
46.4	100.8687	50.2106	B=16.2, R=15.1	APM-N
53.4	100.8751	50.1906	B=19.4, R=18.3	APM-N
60.4	100.9013	50.2173	B2=21.1, R1=19.5	USNO-B1
63.0	100.8633	50.1939	B=17.2, R=16.0	APM-N
72.8	100.9136	50.2134	B1=20.8, B2=21.7	USNO-B1
78.4	100.9078	50.1872	B=16.0, R=15.3	APM-N
79.9	100.8661	50.2221	B=21.3, R=19.8	APM-N
80.5	100.9170	50.1937	B=15.5, R=14.7	APM-N
80.9	100.8659	50.2223	B1=21.0, B2=21.1, R1=19.6, R2=20.4	USNO-B1
86.9	100.8482	50.2057	B2=21.6, R1=19.7, R2=20.2	USNO-B1
87.8	100.8987	50.2267	B=21.2, R=18.4	APM-N
95.4	100.9235	50.2148	B=16.6, R=15.6	APM-N
100.6	100.9189	50.2220	B1=21.0, R1=19.1	USNO-B1
100.7	100.8448	50.1940	B2=21.4, R2=20.5	USNO-B1
101.4	100.8445	50.1940	B2=21.9, I=19.0, R2=20.2	USNO-B1
101.9	100.8492	50.1880	R1=19.2, R2=20.5	USNO-B1
101.9	100.8773	50.1760	B2=17.9, R1=16.8	USNO-B1
102.0	100.8415	50.2049	B1=21.0, R1=15.8	USNO-B1
102.3	100.8780	50.1758	B=17.0, R=15.2	APM-N
102.8	100.8665	50.2295	B1=20.9, B2=20.4, R1=19.9, R2=19.2	USNO-B1
102.8	100.8491	50.1875	B=21.3, R=19.6	APM-N
103.6	100.8768	50.1756	I=14.9, R1=15.4, R2=17.0	USNO-B1
104.3	100.8666	50.2300	B2=21.4, R1=18.9, R2=20.5	USNO-B1
105.2	100.8409	50.2089	B=18.2, R=16.9	APM-N
107.8	100.9167	50.1813	B=18.3, R=16.7	APM-N
108.6	100.8881	50.1737	B=20.9, R=18.5	APM-N
108.8	100.8756	50.2333	B2=21.7, I=18.9, R1=19.8, R2=20.6	USNO-B1
109.0	100.9314	50.2118	B=16.5, R=15.0	APM-N
116.6	100.9243	50.2248	I=18.9, R1=19.2	USNO-B1
120.6	100.8363	50.2147	B2=21.6, I=19.0, R1=20.2, R2=20.3	USNO-B1
120.7	100.9364	50.1952	B=18.0, R=17.1	APM-N
121.2	100.8548	50.2310	R1=19.5, R2=19.8	USNO-B1
121.2	100.8520	50.2296	B1=20.9, R1=18.6	USNO-B1
121.9	100.8546	50.2312	B2=21.2, R1=19.6, R2=19.6	USNO-B1
122.1	100.8526	50.1774	I=18.5, R1=19.3	USNO-B1
124.0	100.8510	50.2301	B=21.1, R=18.5	APM-N
125.1	100.9244	50.1794	B=16.8, R=15.8	APM-N
125.5	100.8507	50.2305	B1=20.3, B2=19.8, I=18.5, R1=18.8, R2=18.7	USNO-B1
131.6	100.8564	50.1725	B=17.0, R=16.0	APM-N
132.4	100.8283	50.2047	B=16.0, R=15.2	APM-N
133.3	100.8280	50.2057	B1=19.7, R1=15.7	USNO-B1
139.2	100.9186	50.1713	B1=21.0, B2=21.7	USNO-B1
139.8	100.9449	50.2126	B1=20.9, B2=21.4, R1=20.2	USNO-B1
140.7	100.9287	50.2317	B1=20.4, I=19.1	USNO-B1
141.6	100.9132	50.2390	I=18.7, R1=17.9, R2=20.3	USNO-B1
145.0	100.8382	50.2301	B2=21.1, R1=19.5, R2=19.8	USNO-B1
145.2	100.8680	50.1651	R1=19.4, R2=20.1	USNO-B1
151.3	100.9510	50.1987	B2=21.2, R1=20.1	USNO-B1
151.4	100.8602	50.1651	B2=21.4, I=18.2, R1=19.4, R2=19.8	USNO-B1
152.2	100.9513	50.1982	B=21.3, R=19.7	APM-N
152.3	100.9498	50.1934	B2=21.2, R1=19.6, R2=20.1	USNO-B1
155.3	100.8874	50.2469	I=18.9, R1=20.2	USNO-B1
158.6	100.9525	50.2148	B1=20.8, R1=19.5	USNO-B1
159.0	100.9517	50.1907	B2=20.9, R1=19.8	USNO-B1
159.5	100.9513	50.2180	I=18.9, R1=19.5, R2=19.9	USNO-B1
159.6	100.9462	50.2255	B=19.2, R=17.5	APM-N
161.9	100.9498	50.1853	B1=20.1, R1=19.4, R2=20.2	USNO-B1
162.1	100.8945	50.2485	B2=21.8, R1=20.1, R2=20.6	USNO-B1
162.7	100.9072	50.2469	B1=20.7, B2=21.8, R2=20.4	USNO-B1
162.7	100.9033	50.1600	B=20.4, R=17.6	APM-N
163.2	100.8547	50.1631	B=20.6, R=20.0	APM-N
163.5	100.9474	50.2263	B1=18.8, I=18.9, R1=16.9	USNO-B1
164.6	100.8723	50.2487	I=18.1, R1=19.2, R2=19.3	USNO-B1
165.8	100.8716	50.2489	B1=20.8, I=18.6	USNO-B1
166.2	100.8762	50.1580	B=21.3, R=20.0	APM-N
170.4	100.8742	50.2505	B2=21.8, R1=20.1, R2=20.6	USNO-B1
171.0	100.9596	50.2087	B=16.1, R=15.1	APM-N
171.9	100.8143	50.1901	B=19.7, R=17.6	APM-N
172.0	100.8140	50.1908	B1=20.5, B2=18.8, I=18.0, R1=18.2, R2=17.8	USNO-B1
172.6	100.9536	50.2242	B1=20.8, I=16.8	USNO-B1
174.7	100.8298	50.2366	B=21.0, R=17.5	APM-N
175.8	100.9433	50.2359	B2=21.5, R2=15.7	USNO-B1
176.6	100.8404	50.2434	B1=20.9, B2=21.9, R1=16.3	USNO-B1
176.7	100.8370	50.2417	B=17.1, R=15.7	APM-N
177.2	100.8177	50.2267	B=17.8, R=15.2	APM-N
177.5	100.9474	50.2334	B=18.2, R=17.4	APM-N
177.7	100.8123	50.1888	B1=20.9, R1=19.7	USNO-B1
178.1	100.8221	50.2318	B2=21.2, R1=20.2, R2=20.3	USNO-B1
182.7	100.8382	50.1632	B=21.3, R=18.1	APM-N
185.7	100.8119	50.2244	B=17.0, R=15.9	APM-N
186.6	100.9663	50.1981	B2=21.9, I=18.7, R1=19.9, R2=20.1	USNO-B1
188.7	100.8652	50.1531	B1=21.0, B2=21.8, R2=20.5	USNO-B1
193.6	100.8199	50.2372	B2=21.3, I=18.1, R1=19.6, R2=19.8	USNO-B1
194.1	100.9290	50.2501	B=20.7, R=18.0	APM-N
196.9	100.8067	50.2245	B=18.9, R=16.4	APM-N
198.2	100.9587	50.2330	B=18.7, R=17.6	APM-N

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