Swift Trigger: 501520;

Presumed name: GRB 110827A

BAT	10^h 56^m 22.80^s, +53° 47′ 13.2″
position:	(164.095, +53.787 ± 180″)
XRT	No position available.
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.011 mag

Best RA:	10^h 56^m 22.80^s	= 164.095 d
Best Dec:	+53° 47′ 13.2″	= +53.787 d

Gal Lat:
Gal Long:

Sun angle:	44.05°, -0.6 hr East of Sun

Stars within 3.33 of BAT position

	RA*	Dec*		Catalogue
26.4	164.0857	53.7919	I=21.1, R=22.1, g=23.8, u=23.5, z=20.8	SDSS
28.3	164.1083	53.7870	I=21.6, R=22.7, g=23.9, u=23.8, z=21.1	SDSS
30.3	164.0921	53.7788	B1=20.7, R2=18.7	USNO-B1
37.3	164.0799	53.7923	I=20.5, R=21.0, g=21.9, u=22.8, z=20.0	SDSS
37.6	164.0800	53.7925	B2=20.8, R1=19.6	USNO-B1
38.9	164.0802	53.7933	h=16.6, j=16.8, k=15.7	2MASS
38.9	164.0803	53.7935	B1=20.6, B2=20.4, I=18.0, R1=18.4, R2=18.6	USNO-B1
41.3	164.0853	53.7771	I=23.1, R=24.1, g=23.3, u=22.2, z=22.3	SDSS
43.6	164.0746	53.7862	B1=19.6, B2=19.7, I=17.9, R1=18.3, R2=18.9	USNO-B1
44.2	164.0899	53.7989	B2=20.8, R1=20.0, R2=19.8	USNO-B1
46.5	164.1025	53.7749	I=21.4, R=22.8, g=22.4, u=20.3, z=21.1	SDSS
48.6	164.1026	53.7743	I=17.9, R1=20.0	USNO-B1
55.5	164.0826	53.7734	I=22.4, R=23.3, g=23.1, u=23.1, z=22.5	SDSS
56.4	164.0967	53.7714	B1=20.3, B2=20.6, R1=19.9, R2=19.6	USNO-B1
61.0	164.1165	53.7758	I=22.2, R=22.2, g=22.4, u=23.2, z=22.8	SDSS
61.9	164.0945	53.8042	I=23.1, R=23.1, g=24.6, u=23.2, z=20.4	SDSS
65.6	164.1033	53.8045	I=22.6, R=23.6, g=22.8, u=23.2, z=22.6	SDSS
69.7	164.0686	53.7984	B1=20.3, B2=20.5, I=18.1, R1=18.7, R2=18.9	USNO-B1
72.5	164.0892	53.8068	I=12.5, R=12.6, g=13.3, u=15.3, z=13.6	SDSS
72.6	164.0891	53.8069	I=12.6, R=12.6, g=13.3, u=15.2, z=13.5	SDSS
72.6	164.0891	53.8069	h=11.2, j=11.5, k=11.1	2MASS
72.7	164.0891	53.8069	B1=13.6, B2=13.2, I=11.4, R1=12.1, R2=12.3	USNO-B1
75.1	164.0866	53.7667	B1=20.7, R1=18.9	USNO-B1
75.2	164.0871	53.7667	B1=20.6, R1=19.1	USNO-B1
76.4	164.1035	53.7664	I=20.5, R=21.6, g=22.7, u=25.3, z=19.8	SDSS
80.7	164.0617	53.7977	I=21.8, R=22.8, g=24.2, u=24.0, z=20.9	SDSS
80.9	164.0616	53.7977	I=21.8, R=22.9, g=24.4, u=24.7, z=20.8	SDSS
82.1	164.1143	53.8067	I=21.9, R=23.0, g=23.6, u=24.1, z=22.3	SDSS
84.5	164.1035	53.8099	B2=20.8, R1=20.1, R2=20.0	USNO-B1
86.0	164.0892	53.8107	B1=20.2, R1=19.2, R2=20.0	USNO-B1
91.6	164.0868	53.8120	I=22.3, R=22.5, g=23.1, u=24.4, z=22.7	SDSS
96.5	164.0757	53.7627	I=24.5, R=24.7, g=23.0, u=25.6, z=21.9	SDSS
101.0	164.1354	53.7723	I=23.5, R=24.9, g=26.2, u=22.1, z=22.3	SDSS
102.2	164.0933	53.8154	I=19.9, R=20.2, g=20.8, u=22.2, z=19.8	SDSS
102.8	164.0933	53.8155	B1=20.6, B2=20.8, I=18.6, R1=19.8	USNO-B1
103.3	164.1435	53.7864	I=20.8, R=21.8, g=23.4, u=25.9, z=20.1	SDSS
104.4	164.1242	53.7637	B1=20.3, B2=20.7	USNO-B1
106.2	164.1243	53.7631	B1=20.2, B2=19.9, R2=19.6	USNO-B1
107.3	164.1245	53.7628	B1=20.4, B2=20.8	USNO-B1
107.4	164.0695	53.8128	I=23.3, R=22.9, g=23.1, u=24.3, z=22.0	SDSS
108.3	164.1242	53.7624	B2=20.8, R1=19.9	USNO-B1
110.7	164.1016	53.8175	I=17.5, R=17.7, g=18.0, u=19.1, z=17.4	SDSS
111.0	164.1016	53.8176	h=16.1, j=16.9, k=15.9	2MASS
111.1	164.1016	53.8176	B1=18.3, B2=18.7, I=16.6, R1=17.4, R2=17.9	USNO-B1
112.3	164.0630	53.8118	I=22.3, R=24.3, g=24.4, u=24.9, z=22.0	SDSS
114.3	164.1085	53.8177	I=20.5, R=20.6, g=20.8, u=21.5, z=20.3	SDSS
114.4	164.0916	53.7553	I=24.0, R=24.7, g=24.7, u=25.9, z=20.7	SDSS
114.5	164.1084	53.8178	B2=20.8, R1=20.1, R2=19.8	USNO-B1
116.4	164.0407	53.7911	I=19.7, R=20.8, g=22.3, u=24.7, z=18.9	SDSS
116.4	164.0407	53.7910	I=18.4, R1=20.0, R2=20.0	USNO-B1
116.6	164.0406	53.7911	I=19.7, R=20.8, g=22.4, u=26.3, z=19.1	SDSS
116.6	164.0802	53.7558	B1=20.6, B2=20.6, R1=19.2, R2=19.4	USNO-B1
116.7	164.1071	53.8186	I=21.4, R=21.8, g=22.6, u=25.7, z=21.2	SDSS
119.0	164.0391	53.7885	I=22.7, R=22.4, g=23.5, u=23.4, z=23.4	SDSS
121.3	164.1058	53.7539	B1=20.7, B2=20.7	USNO-B1
121.5	164.0385	53.7818	B2=19.9, R2=20.0	USNO-B1
124.0	164.1060	53.7532	B1=20.7, R2=20.0	USNO-B1
125.2	164.0958	53.7522	I=22.2, R=22.2, g=22.5, u=22.6, z=21.4	SDSS
126.8	164.0484	53.7650	B1=19.1, B2=19.1, I=15.8, R1=16.8, R2=17.2	USNO-B1
126.9	164.0485	53.7649	h=14.6, j=15.3, k=14.6	2MASS
127.0	164.0484	53.7649	I=16.7, R=17.2, g=18.4, u=21.0, z=16.4	SDSS
132.3	164.0610	53.8178	I=21.1, R=21.0, g=21.4, u=22.5, z=20.8	SDSS
133.0	164.1193	53.8211	B2=20.6, R1=20.2	USNO-B1
133.5	164.1195	53.8211	I=21.5, R=21.8, g=22.1, u=23.0, z=21.5	SDSS
133.7	164.1019	53.8239	B1=20.6, R1=20.1	USNO-B1
134.1	164.1010	53.8241	I=17.7, R=18.3, g=19.5, u=22.0, z=17.3	SDSS
134.3	164.1010	53.8241	h=15.5, j=16.3, k=15.5	2MASS
134.5	164.1010	53.8242	B1=20.5, B2=20.3, I=17.1, R1=18.2, R2=18.5	USNO-B1
137.7	164.0509	53.7590	I=22.9, R=22.5, g=22.6, u=22.7, z=22.2	SDSS
138.7	164.0979	53.8255	I=23.2, R=24.3, g=25.1, u=24.4, z=21.0	SDSS
139.1	164.1604	53.7858	I=24.9, R=24.5, g=24.6, u=25.5, z=20.7	SDSS
139.3	164.1583	53.7770	I=18.2, R2=19.9	USNO-B1
147.2	164.0258	53.7882	I=19.8, R=20.8, u=24.8, z=19.1	SDSS
147.3	164.0258	53.7882	I=19.8, R=20.8, g=22.0, u=23.1, z=19.2	SDSS
150.7	164.1353	53.8214	B2=20.6, R2=20.0	USNO-B1
153.3	164.1658	53.7790	I=23.3, R=23.4, g=23.2, u=25.4, z=22.6	SDSS
153.7	164.0836	53.7448	B1=20.4, I=16.8, R2=19.5	USNO-B1
154.3	164.0837	53.7447	I=17.7, R=19.2, g=20.6, u=23.7, z=17.0	SDSS
154.3	164.0838	53.7447	h=14.9, j=15.6, k=14.6	2MASS
154.3	164.1659	53.7962	R1=20.1, R2=19.9	USNO-B1
154.9	164.0873	53.7442	B2=20.8, I=17.6, R1=18.9, R2=19.4	USNO-B1
155.1	164.0873	53.7442	h=15.8, j=16.8, k=15.5	2MASS
155.4	164.0872	53.7441	I=18.4, R=19.4, g=20.8, u=23.5, z=17.9	SDSS
155.7	164.0852	53.7441	B1=20.5, R2=19.9	USNO-B1
158.2	164.1685	53.7936	I=22.3, R=22.3, g=23.5, u=26.1, z=22.5	SDSS
159.5	164.0999	53.8312	I=22.7, R=22.8, g=24.8, u=23.3, z=22.3	SDSS
161.2	164.1113	53.7433	I=21.9, R=23.1, g=25.4, u=25.9, z=21.5	SDSS
163.6	164.0204	53.7760	I=21.9, R=24.5, g=23.7, u=24.5, z=22.8	SDSS
164.0	164.1721	53.7863	I=22.8, R=24.2, g=23.1, u=23.9, z=22.6	SDSS
166.3	164.0213	53.7716	I=23.2, R=25.0, g=25.6, u=25.7, z=20.8	SDSS
167.4	164.0260	53.8094	I=22.2, R=22.7, g=23.9, u=23.8, z=21.7	SDSS
168.3	164.1077	53.7408	I=22.4, R=22.6, g=22.9, u=24.0, z=22.3	SDSS
168.8	164.0160	53.7914	I=21.9, R=22.6, g=22.9, u=22.8, z=21.9	SDSS
169.2	164.0696	53.7425	I=23.5, R=22.7, g=23.2, u=23.6, z=21.6	SDSS
170.4	164.1626	53.7616	I=21.3, R=22.3, g=23.3, u=24.8, z=20.9	SDSS
170.5	164.0163	53.7961	I=18.2, R1=19.9, R2=19.6	USNO-B1
174.5	164.0628	53.7424	I=20.7, R=20.9, g=21.4, u=22.3, z=20.2	SDSS
174.6	164.0626	53.7424	B1=20.7, B2=20.6, R2=20.0	USNO-B1
175.0	164.0818	53.8350	B1=20.6, B2=20.6, I=18.6, R2=19.9	USNO-B1
175.6	164.0658	53.8326	I=19.0, R=19.2, g=19.6, u=20.7, z=18.9	SDSS
176.1	164.0658	53.8328	B1=19.8, B2=20.3, I=18.5, R1=19.1, R2=19.7	USNO-B1
179.0	164.0193	53.7653	I=22.3, R=22.7, g=22.9, u=22.8, z=22.2	SDSS
179.4	164.0109	53.7834	I=25.1, R=25.2, g=24.2, u=22.0, z=22.8	SDSS
180.2	164.1488	53.8257	h=13.3, j=13.8, k=13.2	2MASS
180.3	164.1488	53.8257	I=14.8, R=15.1, g=15.8, u=17.7, z=14.7	SDSS
180.5	164.1488	53.8258	B1=16.4, B2=16.4, I=14.0, R1=14.7, R2=15.1	USNO-B1
180.8	164.0859	53.7371	B1=20.6, B2=20.8, R1=19.1, R2=20.0	USNO-B1
182.1	164.0707	53.8355	h=16.4, j=16.7, k=15.9	2MASS
182.1	164.0706	53.8355	I=17.8, R=17.9, g=18.2, u=19.1, z=17.7	SDSS
182.4	164.0706	53.8356	B1=18.5, B2=18.9, I=17.4, R1=17.5, R2=18.1	USNO-B1
182.7	164.0357	53.7503	I=22.1, R=23.4, g=23.9, u=24.9, z=21.4	SDSS
182.7	164.0099	53.7801	I=22.5, R=22.3, g=22.6, u=24.2, z=22.8	SDSS
184.1	164.0183	53.7633	I=23.8, R=25.6, g=24.9, u=24.2, z=20.8	SDSS
185.9	164.0099	53.7989	I=20.3, R=20.3, g=20.5, u=20.9, z=20.1	SDSS
186.1	164.0099	53.7989	B1=20.3, B2=20.8, R1=20.0, R2=20.0	USNO-B1
186.2	164.1503	53.7469	B1=18.0, B2=18.0, I=15.1, R1=16.1, R2=16.5	USNO-B1
186.4	164.1502	53.7468	I=16.2, R=16.5, g=17.4, u=19.5, z=16.0	SDSS
186.5	164.1503	53.7468	h=14.4, j=15.0, k=14.1	2MASS
186.7	164.0348	53.8248	I=24.7, R=24.5, g=25.9, u=22.2, z=22.6	SDSS
187.9	164.0671	53.7375	h=15.8, j=16.8, k=15.3	2MASS
188.0	164.0669	53.7375	B1=20.0, B2=19.8, I=17.1, R1=17.7, R2=18.7	USNO-B1
190.7	164.0267	53.8214	I=22.5, R=22.7, g=24.2, u=23.1, z=22.0	SDSS
190.8	164.0091	53.8022	I=24.6, R=22.7, g=25.4, u=25.2, z=23.5	SDSS
191.2	164.0450	53.7429	I=21.8, R=22.0, g=23.1, u=23.6, z=21.9	SDSS
191.6	164.1462	53.7432	B1=17.7, B2=17.8, I=14.9, R1=15.8, R2=16.3	USNO-B1
191.8	164.1461	53.7431	I=15.9, R=16.2, g=17.1, u=19.2, z=15.7	SDSS
191.9	164.1462	53.7431	h=14.0, j=14.6, k=13.9	2MASS
192.9	164.0287	53.8236	I=22.0, R=25.9, g=25.6, u=21.3, z=21.4	SDSS
194.9	164.0080	53.8040	I=22.3, R=22.2, g=23.7, u=24.3, z=22.9	SDSS
195.8	164.0044	53.7774	I=22.4, R=22.6, g=23.1, u=23.2, z=21.6	SDSS
195.8	164.0660	53.8386	I=19.2, R=19.3, g=19.4, u=19.4, z=19.3	SDSS
196.2	164.0660	53.8387	B1=20.2, B2=19.9, I=18.6, R1=19.6, R2=19.5	USNO-B1
197.2	164.0179	53.7566	I=22.1, R=23.1, g=25.2, u=24.4, z=22.3	SDSS
197.7	164.1600	53.8263	I=22.4, R=22.4, g=22.1, u=22.4, z=22.2	SDSS
197.8	164.0159	53.7581	I=20.7, R=22.3, g=24.0, u=24.1, z=20.1	SDSS
197.9	164.0610	53.8382	I=25.2, R=22.8, g=25.9, u=23.9, z=23.1	SDSS
198.9	164.0940	53.8423	I=23.9, R=24.5, g=24.8, u=22.2, z=23.7	SDSS
199.4	164.1755	53.8155	I=22.7, R=22.7, g=23.0, u=23.4, z=21.5	SDSS
199.9	164.0385	53.8314	h=16.2, j=16.7, k=15.6	2MASS

Queried USNO-B1, SDSS, 2MASS.

* 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.