Swift Trigger: 430172;

Presumed name: GRB 100728B

BAT	02^h 56^m 12.72^s, +00° 16′ 46.2″
position:	(44.053, 0.2795 ± 180″)
XRT	02^h 56^m 13.46^s, +00° 16′ 52.0″
position:	(44.0561, +0.2811 ± 0.8″)
UVOT	02^h 56^m 13.46^s, +00° 16′ 52.0″
position:	(44.0561, +0.2811 ± 0.8″)
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.068 mag

Best RA:	02^h 56^m 13.46^s	= 44.0561 d
Best Dec:	+00° 16′ 52.0″	= +0.2811 d

Gal Lat:
Gal Long:

Sun angle:	not found

Stars within 3.33 of UVOT position

	RA*	Dec*		Catalogue
40.3	44.0669	0.2841	I=21.6, R=22.6, g=25.2, u=24.8, z=21.1	SDSS
47.5	44.0692	0.2826	B2=21.1, R1=19.4, R2=20.5	USNO-B1
48.2	44.0471	0.2712	I=18.4, R2=20.4	USNO-B1
48.5	44.0471	0.2711	I=19.1, R=20.3, g=21.8, u=23.8, z=18.4	SDSS
58.1	44.0443	0.2922	I=24.4, R=25.1, g=23.0, u=24.9, z=22.3	SDSS
60.4	44.0448	0.2686	I=21.8, R=23.8, g=25.9, u=23.1, z=20.8	SDSS
61.0	44.0431	0.2702	B2=21.2, I=18.7, R1=19.1, R2=20.5	USNO-B1
61.1	44.0432	0.2701	I=19.0, R=19.7, g=21.1, u=22.8, z=18.6	SDSS
61.4	44.0396	0.2767	I=20.2, R=21.8, g=23.1, u=23.5, z=19.5	SDSS
68.9	44.0623	0.2630	I=19.5, R=20.1, g=21.6, u=23.1, z=19.2	SDSS
69.7	44.0623	0.2628	B2=20.3, I=18.3, R1=19.1, R2=18.8	USNO-B1
71.2	44.0424	0.2669	I=22.0, R=22.8, g=23.4, u=23.2, z=21.7	SDSS
73.1	44.0614	0.2615	B1=20.2, B2=20.0, R2=19.8	USNO-B1
75.8	44.0643	0.2617	B1=17.9, B2=15.5, I=16.5, R1=16.0, R2=15.7	USNO-B1
75.8	44.0648	0.2619	B2=18.6, I=17.9, R1=17.1	USNO-B1
76.0	44.0655	0.2622	B2=19.4, I=18.8, R1=18.1, R2=19.3	USNO-B1
76.4	44.0369	0.2721	I=20.5, R=21.8, g=22.7, u=23.9, z=19.9	SDSS
79.3	44.0384	0.2680	I=22.6, R=22.2, g=22.7, u=23.5, z=21.9	SDSS
79.9	44.0626	0.3023	I=21.5, R=21.5, g=21.9, u=24.6, z=21.2	SDSS
81.1	44.0657	0.2607	B1=19.5, R1=19.4, R2=18.5	USNO-B1
82.9	44.0755	0.2935	I=24.2, R=22.6, g=25.7, u=24.6, z=22.6	SDSS
90.5	44.0338	0.2695	B1=20.9, B2=21.1, R2=20.5	USNO-B1
96.7	44.0644	0.2556	I=20.5, R=21.6, g=23.0, u=25.3, z=19.8	SDSS
97.2	44.0722	0.3027	I=21.0, R=22.8, g=23.9, u=23.2, z=19.7	SDSS
98.7	44.0835	0.2829	B2=21.1, I=18.8, R1=19.4, R2=20.1	USNO-B1
101.2	44.0793	0.2970	h=14.9, j=15.7, k=14.7	2MASS
101.2	44.0792	0.2972	B2=20.7, I=17.4, R1=18.1, R2=19.2	USNO-B1
101.3	44.0793	0.2971	I=17.6, R=18.7, g=20.0, u=22.9, z=17.0	SDSS
101.9	44.0381	0.2592	I=18.6, R1=19.4, R2=19.8	USNO-B1
102.6	44.0472	0.2540	B2=21.2, R1=19.7, R2=20.5	USNO-B1
103.7	44.0547	0.2523	B1=20.6, B2=20.7, I=18.7, R1=19.8, R2=20.5	USNO-B1
103.8	44.0548	0.2523	I=19.5, R=19.7, g=19.8, u=20.0, z=19.2	SDSS
108.4	44.0338	0.3013	B2=21.2, R1=19.8	USNO-B1
108.5	44.0618	0.2515	I=24.1, R=25.5, g=24.9, u=21.9, z=23.9	SDSS
108.7	44.0519	0.2512	I=19.6, R=20.9, g=22.2, u=25.9, z=18.9	SDSS
112.5	44.0251	0.2773	B1=20.8, B2=20.4, R2=20.1	USNO-B1
112.8	44.0251	0.2763	I=19.8, R=20.1, g=20.0, u=20.5, z=19.7	SDSS
116.9	44.0695	0.2515	I=23.3, R=25.0, g=24.5, u=21.7, z=21.8	SDSS
119.5	44.0460	0.2495	I=21.0, R=22.4, g=23.8, u=23.8, z=20.2	SDSS
120.2	44.0263	0.2961	h=16.1, j=16.7, k=15.1	2MASS
120.5	44.0262	0.2962	I=18.8, R=20.1, g=21.6, u=23.5, z=18.1	SDSS
121.1	44.0850	0.2638	I=23.2, R=22.5, g=24.2, u=23.0, z=21.5	SDSS
122.6	44.0773	0.2545	I=22.2, R=22.0, g=22.9, u=23.4, z=21.7	SDSS
124.1	44.0273	0.2621	B2=20.9, R1=19.5, R2=20.1	USNO-B1
125.6	44.0214	0.2844	B2=21.2, R1=19.8	USNO-B1
125.7	44.0213	0.2843	I=20.7, R=20.9, g=21.2, u=22.0, z=21.0	SDSS
126.5	44.0342	0.2537	I=19.6, R=19.8, g=20.5, u=21.9, z=19.6	SDSS
126.5	44.0341	0.2537	B2=21.1, R1=19.6, R2=20.5	USNO-B1
131.7	44.0405	0.3142	I=20.7, R=20.8, g=21.0, u=21.7, z=20.3	SDSS
132.2	44.0404	0.3143	B2=21.2, R1=19.6, R2=20.6	USNO-B1
133.7	44.0480	0.3173	I=20.1, R=19.9, g=19.7, u=20.0, z=20.2	SDSS
133.7	44.0480	0.3173	B1=20.0, B2=20.4, R1=19.6, R2=20.4	USNO-B1
134.5	44.0934	0.2791	I=21.9, R=23.4, g=25.7, u=24.6, z=21.2	SDSS
136.0	44.0924	0.2706	B1=20.6, B2=20.4, I=18.6, R1=18.8, R2=19.2	USNO-B1
140.9	44.0293	0.2525	I=22.6, R=24.1, g=25.7, u=23.8, z=20.4	SDSS
143.5	44.0378	0.3165	I=20.8, R=22.4, g=23.9, u=26.1, z=20.0	SDSS
146.7	44.0739	0.3178	I=22.0, R=23.6, g=25.1, u=25.4, z=21.4	SDSS
147.4	44.0706	0.2428	B1=20.8, B2=21.2, R2=20.6	USNO-B1
147.7	44.0421	0.2426	I=17.7, R=18.3, g=19.4, u=22.9, z=17.4	SDSS
147.9	44.0707	0.2427	I=20.2, R=20.5, g=21.0, u=23.4, z=20.1	SDSS
148.7	44.0384	0.2438	I=23.7, R=24.5, g=23.0, u=26.1, z=23.0	SDSS
149.2	44.0411	0.2425	B1=16.3, B2=16.2, I=13.3, R1=13.7, R2=13.9	USNO-B1
149.4	44.0411	0.2424	h=12.2, j=12.8, k=12.1	2MASS
149.4	44.0411	0.2424	I=14.6, R=14.5, g=15.6, u=18.2, z=13.9	SDSS
149.6	44.0539	0.3226	B2=20.9, R2=20.2	USNO-B1
152.6	44.0242	0.2531	I=24.2, R=24.4, g=23.4, u=24.2, z=23.9	SDSS
152.8	44.0262	0.2510	B2=21.1, R1=19.2, R2=20.4	USNO-B1
152.8	44.0155	0.2935	I=24.1, R=22.1, g=26.0, u=23.6, z=22.6	SDSS
153.2	44.0253	0.2517	B2=18.6, I=18.1, R1=18.9, R2=18.4	USNO-B1
153.2	44.0254	0.2516	B1=20.4, B2=19.9, R1=19.2	USNO-B1
153.8	44.0291	0.2480	B1=19.9, B2=19.6, I=18.4, R1=18.3, R2=19.0	USNO-B1
153.8	44.0291	0.2480	I=18.2, R=18.4, g=18.8, u=20.0, z=18.1	SDSS
157.4	44.0124	0.2817	I=22.3, R=22.1, g=22.9, u=23.0, z=21.6	SDSS
158.4	44.0513	0.2374	B2=20.9, R1=19.7, R2=20.5	USNO-B1
159.4	44.0150	0.2646	I=20.8, R=21.5, g=23.3, u=26.4, z=20.4	SDSS
160.2	44.0896	0.2519	I=21.2, R=22.1, g=23.7, u=23.5, z=21.2	SDSS
161.3	44.0613	0.2366	I=20.8, R=20.8, g=21.1, u=22.4, z=20.5	SDSS
162.0	44.0615	0.2364	B2=21.2, R1=19.4	USNO-B1
162.5	44.0229	0.2506	B2=19.9, I=18.4, R1=18.8, R2=18.7	USNO-B1
163.0	44.0164	0.2593	I=22.2, R=22.7, g=24.2, u=25.0, z=22.0	SDSS
164.4	44.0806	0.2426	I=20.8, R=21.5, g=22.9, u=23.7, z=20.4	SDSS
166.4	44.0266	0.3167	I=24.6, R=25.0, g=23.2, u=26.1, z=22.9	SDSS
166.5	44.0433	0.3255	h=15.6, j=18.0, k=16.7	2MASS
166.5	44.0241	0.3145	I=24.7, R=24.3, g=23.2, u=25.8, z=23.4	SDSS
167.0	44.0924	0.3099	I=22.4, R=23.3, g=24.7, u=22.9, z=21.5	SDSS
168.1	44.0514	0.2346	I=21.3, R=22.5, g=24.4, u=23.7, z=20.8	SDSS
168.5	44.0141	0.3017	I=22.1, R=24.3, g=23.6, u=23.5, z=23.1	SDSS
168.9	44.0369	0.2383	I=19.3, R=20.6, g=22.1, u=22.9, z=18.7	SDSS
169.1	44.0368	0.2383	I=18.7, R1=20.0, R2=20.6	USNO-B1
169.7	44.1027	0.2742	B1=20.7, B2=20.1, I=18.2, R1=18.2, R2=19.0	USNO-B1
170.4	44.0762	0.2382	B1=20.7, B2=19.9, I=17.1, R1=17.8, R2=18.1	USNO-B1
170.4	44.0862	0.2446	I=19.4, R=20.9, g=22.2, u=25.5, z=18.6	SDSS
170.4	44.0820	0.2415	I=19.4, R=20.4, g=22.0, u=23.9, z=18.9	SDSS
170.7	44.0763	0.2382	h=16.2, j=16.7, k=14.8	2MASS
171.5	44.1036	0.2782	B1=13.0, B2=12.4, I=11.4, R1=11.5, R2=11.6	USNO-B1
171.6	44.1038	0.2811	B2=21.0, R2=20.3	USNO-B1
171.7	44.1037	0.2782	h=10.8, j=11.0, k=10.7	2MASS
171.7	44.1037	0.2782	I=11.9, R=12.0, g=12.3, u=14.7, z=13.4	SDSS
173.7	44.0081	0.2758	B2=21.2, R1=19.6	USNO-B1
175.0	44.0248	0.2439	I=20.8, R=20.9, g=21.1, u=22.0, z=20.5	SDSS
176.4	44.0543	0.3301	I=23.9, R=24.8, g=24.0, u=24.6, z=21.0	SDSS
176.9	44.0081	0.2918	I=21.6, R=22.3, g=24.1, u=24.1, z=21.4	SDSS
177.7	44.0121	0.3035	B2=21.0, R1=19.9, R2=20.4	USNO-B1
178.9	44.0286	0.3225	I=18.2, R=18.9, g=20.3, u=22.8, z=17.8	SDSS
179.2	44.0285	0.3225	B2=20.9, I=18.2, R1=17.8, R2=19.6	USNO-B1
179.4	44.0284	0.3225	h=15.9, j=16.4, k=15.4	2MASS
179.8	44.1033	0.2646	B2=21.1, I=18.0, R1=19.1, R2=19.9	USNO-B1
179.8	44.1033	0.2647	I=18.1, R=19.3, g=20.8, u=25.0, z=17.4	SDSS
179.9	44.1033	0.2647	h=15.3, j=15.9, k=15.5	2MASS
182.0	44.0448	0.2318	I=20.3, R=20.7, g=21.8, u=23.4, z=20.2	SDSS
183.6	44.0955	0.3135	h=14.7, j=15.4, k=14.5	2MASS
183.6	44.0954	0.3136	B1=20.9, B2=20.8, I=16.9, R1=17.9, R2=18.9	USNO-B1
183.7	44.0955	0.3135	I=17.3, R=18.4, g=19.9, u=22.6, z=16.7	SDSS
185.2	44.0149	0.2503	I=22.3, R=22.5, g=23.0, u=22.7, z=21.7	SDSS
185.4	44.0066	0.2670	B1=20.5, B2=20.9, R1=20.0, R2=20.5	USNO-B1
185.8	44.0045	0.2819	I=21.9, R=23.3, g=24.0, u=26.2, z=21.3	SDSS
186.1	44.0596	0.2295	I=23.2, R=21.5, g=22.2, u=21.3, z=20.2	SDSS
187.7	44.0587	0.2290	B1=18.3, B2=16.4, I=16.3, R1=15.9, R2=15.4	USNO-B1
187.9	44.0586	0.2290	h=15.3, j=16.1, k=15.0	2MASS
188.8	44.0584	0.2287	B1=18.6, I=17.5, R1=17.2	USNO-B1
190.3	44.0096	0.3063	I=25.1, R=25.8, g=23.0, u=25.3, z=23.5	SDSS
192.3	44.0504	0.3342	I=18.8, R1=19.6, R2=20.2	USNO-B1
195.2	44.1086	0.2945	I=20.8, R=21.5, g=22.9, u=23.2, z=20.3	SDSS
197.6	44.0985	0.3159	I=21.9, R=22.1, g=23.0, u=25.3, z=21.6	SDSS
199.1	44.0636	0.2263	B1=21.0, I=18.6, R2=20.5	USNO-B1
199.6	44.0640	0.2262	I=19.2, R=19.8, g=21.3, u=23.0, z=18.9	SDSS

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.