Swift Trigger: 642018;

Presumed name: GRB 150530A

BAT	21^h 50^m 05.52^s, +57° 29′ 24.0″
position:	(327.523, 57.490 ± 180″)
XRT	21^h 50^m 02.62^s, +57° 30′ 59.0″
position:	(327.5109, 57.5164 ± 3.3″)
UVOT	No position available.
Galactic N_HI:	8.57×10⁰ cm^-2
Galactic E(B-V):	2.089 mag

Best RA:	21^h 50^m 02.62^s	= 327.5109 d
Best Dec:	+57° 30′ 59.0″	= 57.5164 d

Gal Lat:	2.79
Gal Long:	100.44

Sun angle:	76.61°, 6.6 hr West

¹Sper #1 auto processing.

Galaxies within 3.33 of XRT position

	RA*	Dec*		Catalogue
2.8	327.5095	57.5166	B1=20.1, B2=20.5	USNO-B1
19.8	327.5211	57.5164	B2=20.5, I=18.3	USNO-B1
29.6	327.4975	57.5204	B2=20.8, I=18.0, R1=17.7, R2=18.7	USNO-B1
30.7	327.5107	57.5079	B1=20.2, B2=20.5, I=17.4, R1=18.3, R2=18.2	USNO-B1
32.8	327.5110	57.5073	B2=20.4, I=17.3, R1=18.2, R2=18.0	USNO-B1
33.1	327.5245	57.5108	B2=20.5, R1=18.9	USNO-B1
33.9	327.5236	57.5099	B1=20.2, B2=20.4, I=18.2, R2=18.8	USNO-B1
41.0	327.4898	57.5173	I=16.7, R1=18.5, R2=19.3	USNO-B1
41.5	327.5026	57.5058	B2=19.3, I=17.4, R2=18.1	USNO-B1
43.4	327.4885	57.5173	B2=20.7, I=17.2, R1=18.4, R2=18.1	USNO-B1
44.1	327.4881	57.5162	I=17.7, R2=19.0	USNO-B1
44.9	327.4877	57.5160	B2=20.6, I=18.2, R1=18.9, R2=19.0	USNO-B1
44.9	327.5163	57.5285	R1=18.9, R2=19.3	USNO-B1
45.5	327.4996	57.5053	I=17.8, R2=16.2	USNO-B1
46.2	327.5014	57.5046	B1=19.3, B2=18.9, I=15.0, R1=16.8, R2=16.5	USNO-B1
47.8	327.5058	57.5034	I=18.0, R2=19.0	USNO-B1
54.7	327.4833	57.5131	I=17.2, R1=18.5, R2=18.7	USNO-B1
54.8	327.4833	57.5129	I=17.4, R1=18.4	USNO-B1
55.2	327.4913	57.5053	I=18.5, R2=19.7	USNO-B1
55.5	327.4839	57.5111	I=18.4, R2=19.2	USNO-B1
57.3	327.4972	57.5305	I=17.8, R1=19.1, R2=19.0	USNO-B1
58.3	327.5086	57.5003	I=18.1, R2=18.9	USNO-B1
62.0	327.4869	57.5278	B1=19.1, B2=20.7, I=18.0, R2=19.1	USNO-B1
70.6	327.5301	57.4997	I=18.3, R2=19.1	USNO-B1
70.9	327.5390	57.5037	B2=20.6, I=17.9, R1=18.6, R2=18.6	USNO-B1
72.4	327.4790	57.5059	I=18.3, R1=18.3	USNO-B1
72.7	327.5482	57.5189	R1=17.4, R2=16.8	USNO-B1
76.7	327.4791	57.5291	R1=19.1, R2=19.9	USNO-B1
79.2	327.4717	57.5100	I=18.1, R2=15.6	USNO-B1
81.1	327.5524	57.5195	B1=16.3, B2=16.5, I=13.5, R1=15.0, R2=14.7	USNO-B1
81.1	327.5080	57.5389	B2=20.3, R1=19.2, R2=19.3	USNO-B1
82.1	327.5524	57.5116	B2=20.5, I=18.1, R1=18.6, R2=18.5	USNO-B1
82.5	327.5533	57.5189	B2=16.6, R1=15.0, R2=18.5	USNO-B1
83.7	327.5541	57.5177	I=17.8, R2=19.0	USNO-B1
84.0	327.5543	57.5176	I=18.2, R2=19.0	USNO-B1
84.6	327.5018	57.5394	I=17.4, R2=18.4	USNO-B1
86.2	327.5035	57.5400	I=17.9, R1=18.9	USNO-B1
86.4	327.5521	57.5257	I=17.9, R1=18.6	USNO-B1
86.9	327.5535	57.5087	B1=19.3, B2=18.9, I=16.4, R1=17.6, R2=17.4	USNO-B1
88.9	327.4701	57.5051	I=18.5, R1=18.7	USNO-B1
89.4	327.5571	57.5156	B2=20.5, I=16.5, R1=18.7, R2=18.1	USNO-B1
89.6	327.5571	57.5147	I=17.8, R1=15.0, R2=18.2	USNO-B1
89.8	327.4678	57.5257	I=18.2, R1=19.0	USNO-B1
90.3	327.4950	57.4928	B1=18.8, B2=16.9, I=13.7, R2=14.8	USNO-B1
91.0	327.4914	57.5394	R1=19.1, R2=17.9	USNO-B1
91.3	327.5319	57.4937	B1=19.6, B2=19.8, I=16.9, R1=18.2, R2=17.7	USNO-B1
91.4	327.5372	57.5375	B2=19.4, R1=17.0	USNO-B1
91.7	327.4904	57.5394	B2=20.6, I=18.2, R2=19.1	USNO-B1
93.9	327.5592	57.5190	B2=20.6, I=18.4, R1=19.2, R2=19.1	USNO-B1
94.2	327.4751	57.5341	B2=20.5, I=18.4, R1=18.7, R2=18.8	USNO-B1
96.5	327.5580	57.5252	B1=20.0, B2=19.4, I=15.3, R1=16.9, R2=16.9	USNO-B1
97.2	327.5170	57.5432	B1=19.9, B2=19.7, I=15.8, R1=17.8, R2=17.1	USNO-B1
97.5	327.5597	57.5095	B1=19.6, B2=19.0, I=16.0, R1=17.9, R2=17.1	USNO-B1
97.5	327.4624	57.5239	I=18.2, R1=18.4, R2=19.7	USNO-B1
98.6	327.5105	57.4890	I=17.3, R2=18.4	USNO-B1
98.9	327.4891	57.4916	I=17.9, R2=19.0	USNO-B1
99.5	327.4891	57.4914	I=18.4, R2=20.1	USNO-B1
100.2	327.5204	57.4890	B1=19.1, B2=18.3, I=14.2, R1=16.0, R2=15.8	USNO-B1
100.5	327.5545	57.5012	B2=20.1, I=12.8	USNO-B1
101.0	327.5564	57.5301	I=17.8, R2=19.2	USNO-B1
101.2	327.5589	57.5051	I=17.6, R2=18.3	USNO-B1
101.8	327.5498	57.4974	I=16.1, R2=17.9	USNO-B1
102.3	327.4619	57.5057	B1=18.9, B2=18.4, I=14.4, R1=16.0, R2=16.4	USNO-B1
102.6	327.5501	57.4972	B1=19.7, B2=20.0, I=17.4, R1=18.1, R2=17.4	USNO-B1
103.9	327.5432	57.5395	B2=20.5, I=18.1, R1=18.6, R2=18.7	USNO-B1
107.6	327.4607	57.5035	B2=20.8, I=18.4, R2=19.6	USNO-B1
108.5	327.4605	57.5297	I=18.4, R1=19.1	USNO-B1
108.8	327.5430	57.4916	I=16.6, R2=18.4	USNO-B1
109.2	327.5459	57.5402	I=18.0, R1=19.4	USNO-B1
109.6	327.4903	57.4880	I=18.5, R1=18.6, R2=19.9	USNO-B1
110.1	327.5300	57.4876	I=18.4, R2=19.1	USNO-B1
111.6	327.5135	57.5474	I=18.4, R1=17.7, R2=19.4	USNO-B1
114.1	327.5628	57.5315	B1=17.4, B2=17.5, I=15.3, R1=16.2, R2=16.0	USNO-B1
114.4	327.4830	57.5444	I=17.8, R1=19.4, R2=19.3	USNO-B1
114.4	327.4812	57.5439	B1=19.9, B2=20.5, I=17.6, R2=17.4	USNO-B1
114.5	327.5317	57.4866	B2=20.6, I=18.3, R1=18.3, R2=18.6	USNO-B1
115.4	327.4815	57.5443	B2=20.5, I=17.2, R1=18.5, R2=16.8	USNO-B1
115.6	327.4623	57.5351	B2=20.6, I=18.4, R1=19.3	USNO-B1
115.9	327.4704	57.4926	I=18.4, R2=19.6	USNO-B1
116.1	327.4519	57.5103	B1=18.2, B2=18.0, I=13.6, R1=15.2, R2=16.0	USNO-B1
116.7	327.4723	57.5413	B2=20.6, I=17.8, R2=18.5	USNO-B1
117.1	327.5009	57.5485	B1=19.9, B2=19.4	USNO-B1
117.9	327.4707	57.5410	I=17.9, R2=18.6	USNO-B1
119.9	327.5474	57.5433	I=17.9, R1=18.9, R2=19.2	USNO-B1
120.1	327.5356	57.5470	I=18.4, R1=17.9, R2=19.2	USNO-B1
120.5	327.4493	57.5114	R1=18.3, R2=19.2	USNO-B1
121.1	327.4616	57.4957	I=18.5, R1=18.6, R2=19.5	USNO-B1
121.6	327.5503	57.5427	R1=18.9, R2=19.1	USNO-B1
121.7	327.4530	57.5032	I=18.3, R2=19.1	USNO-B1
122.0	327.5497	57.4897	I=18.5, R1=18.8, R2=19.2	USNO-B1
123.7	327.5732	57.5243	I=16.5, R1=18.6	USNO-B1
125.6	327.5630	57.5372	I=17.8, R1=18.5, R2=19.2	USNO-B1
126.2	327.4743	57.5455	B2=20.8, I=17.8, R1=18.7, R2=17.9	USNO-B1
126.3	327.4456	57.5172	I=18.3, R2=19.3	USNO-B1
127.3	327.5502	57.5448	B1=20.2, B2=20.5, R2=18.6	USNO-B1
127.5	327.5571	57.5417	B2=20.6, I=18.1, R1=18.9, R2=19.1	USNO-B1
127.5	327.5456	57.4863	B1=20.4, I=17.8, R2=18.8	USNO-B1
128.1	327.4728	57.4873	B2=20.4, I=17.6, R2=18.3	USNO-B1
128.3	327.5366	57.4835	I=16.9, R2=18.9	USNO-B1
131.1	327.5641	57.4938	B2=20.6, I=17.8, R1=18.8, R2=19.0	USNO-B1
133.6	327.4418	57.5176	I=16.9, R2=19.8	USNO-B1
134.6	327.5556	57.5451	B1=20.0, I=17.9, R2=18.6	USNO-B1
134.8	327.5573	57.5444	I=17.6, R1=18.7	USNO-B1
135.1	327.4558	57.4933	I=18.1, R2=19.2	USNO-B1
135.9	327.4559	57.4929	I=18.4, R2=19.2	USNO-B1
136.1	327.4560	57.4927	I=18.3, R2=19.4	USNO-B1
137.2	327.5226	57.5540	I=18.3, R1=19.0, R2=19.1	USNO-B1
137.3	327.5222	57.5541	I=17.9, R1=19.2, R2=19.2	USNO-B1
139.7	327.5622	57.5437	B1=17.8, B2=17.9, I=14.9, R1=16.2, R2=16.2	USNO-B1
140.5	327.4404	57.5258	R1=18.9, R2=19.4	USNO-B1
141.6	327.5679	57.5411	B2=20.1, I=18.3, R2=19.0	USNO-B1
142.2	327.4751	57.5509	I=18.5, R1=19.4, R2=19.4	USNO-B1
142.7	327.4392	57.5259	B2=20.6, I=17.7, R1=18.7, R2=19.3	USNO-B1
143.3	327.5340	57.4786	B2=20.4, I=17.5, R2=19.1	USNO-B1
143.5	327.5831	57.5257	B2=20.5, I=17.9, R1=19.0, R2=18.9	USNO-B1
143.7	327.4371	57.5212	I=18.4, R2=19.6	USNO-B1
144.4	327.4461	57.4964	I=18.4, R2=19.3	USNO-B1
146.0	327.4362	57.5106	I=17.6, R1=19.0	USNO-B1
146.0	327.5731	57.5394	B2=20.4, I=18.1, R1=18.8, R2=19.0	USNO-B1
146.1	327.5852	57.5238	I=18.4, R1=19.1, R2=19.1	USNO-B1
146.8	327.5768	57.5367	R1=16.9, R2=16.5	USNO-B1
148.4	327.5139	57.4752	R1=18.8, R2=19.3	USNO-B1
148.6	327.4511	57.4905	B1=20.1, R2=19.9	USNO-B1
148.9	327.4678	57.5507	B2=20.7, I=17.8, R1=18.7, R2=19.1	USNO-B1
150.0	327.4444	57.4949	I=16.6, R2=18.2	USNO-B1
150.2	327.4921	57.5569	B1=19.0, I=17.6, R1=18.6	USNO-B1
150.4	327.5880	57.5217	B2=20.5, I=17.7, R1=18.6, R2=18.6	USNO-B1
150.6	327.5676	57.4877	B2=20.4, I=17.9, R2=19.0	USNO-B1
151.1	327.4454	57.4935	B2=20.5, I=17.8, R2=18.6	USNO-B1
151.9	327.4646	57.5505	B2=19.5, I=17.1, R1=18.7, R2=17.9	USNO-B1
153.3	327.5743	57.5420	B1=20.1, R1=16.4, R2=19.2	USNO-B1
154.4	327.4366	57.5321	B1=19.0, B2=19.1, I=16.1, R1=17.7	USNO-B1
155.1	327.4362	57.5321	B2=19.3, I=16.1, R1=17.6, R2=17.0	USNO-B1
155.9	327.5883	57.5043	B1=19.0, B2=19.0, I=16.9, R1=17.7, R2=17.5	USNO-B1
156.0	327.4872	57.5578	I=18.4, R2=19.5	USNO-B1
156.8	327.4535	57.5472	B2=20.4, I=18.2, R1=18.7, R2=18.0	USNO-B1
157.4	327.4377	57.4972	B2=20.5, I=16.5, R1=18.2, R2=18.0	USNO-B1
157.5	327.4455	57.5425	I=18.4, R2=19.7	USNO-B1
157.6	327.4348	57.5320	B1=19.8, B2=19.9, I=16.6, R1=17.3, R2=17.1	USNO-B1
157.7	327.4980	57.4731	B2=20.6, I=17.8, R1=18.7, R2=19.0	USNO-B1
158.7	327.4739	57.4770	I=17.5, R1=16.6, R2=18.1	USNO-B1
158.9	327.4693	57.5545	I=18.4, R1=19.2, R2=19.5	USNO-B1
159.3	327.4338	57.5320	B2=19.5, I=17.2, R2=17.2	USNO-B1
159.7	327.5270	57.4729	B2=19.9, I=17.3, R1=18.2	USNO-B1
159.8	327.5663	57.4835	I=17.9, R1=18.7	USNO-B1
160.7	327.5830	57.4942	B2=19.8, I=16.9, R2=19.0	USNO-B1
161.1	327.5446	57.5573	B2=20.5, I=17.6, R2=18.5	USNO-B1
162.3	327.5095	57.5615	B2=20.3, I=17.9, R1=18.9, R2=18.4	USNO-B1
162.7	327.4662	57.5547	I=17.8, R2=19.6	USNO-B1
162.8	327.4568	57.5510	B1=20.1, I=17.9, R1=18.5	USNO-B1
163.0	327.4405	57.5413	I=18.2, R1=19.1, R2=19.2	USNO-B1
163.7	327.5113	57.4709	I=18.2, R2=19.3	USNO-B1
163.9	327.5148	57.5619	B1=19.6, B2=19.5, I=17.3, R1=18.1, R2=17.3	USNO-B1
164.5	327.5475	57.5576	I=17.6, R2=19.2	USNO-B1
165.3	327.5847	57.4933	B2=20.4, I=18.3, R2=19.3	USNO-B1
165.7	327.4510	57.5493	I=18.5, R1=17.9, R2=19.7	USNO-B1
166.5	327.4758	57.5586	B1=19.6, I=18.2, R2=18.3	USNO-B1
167.0	327.4798	57.5597	B1=17.7, B2=17.9, I=15.0, R1=16.2, R2=16.5	USNO-B1
169.1	327.4318	57.4964	B2=20.6, R2=18.9	USNO-B1
170.0	327.4849	57.5615	B1=17.6, R1=16.2, R2=18.9	USNO-B1
170.3	327.4380	57.4899	B2=20.6, I=18.0, R1=18.6, R2=18.7	USNO-B1
170.7	327.4233	57.5107	I=18.0, R2=19.1	USNO-B1
171.1	327.5236	57.5634	B2=20.6, I=17.7, R1=18.6, R2=19.2	USNO-B1
171.5	327.5804	57.4868	B2=18.9, I=16.9, R2=17.3	USNO-B1
171.6	327.4826	57.4712	I=18.0, R1=15.6, R2=18.7	USNO-B1
171.7	327.4845	57.5619	B1=20.0, R2=18.8	USNO-B1
171.9	327.4576	57.4782	B2=19.9, I=12.2	USNO-B1
172.1	327.5972	57.5047	B2=20.3, I=17.9, R1=18.8, R2=19.1	USNO-B1
173.2	327.4800	57.4712	B1=19.7, B2=20.0, I=16.2, R1=17.6, R2=17.4	USNO-B1
173.6	327.4565	57.4780	B2=19.2, I=12.4, R2=13.4	USNO-B1
174.6	327.5277	57.5641	I=17.5, R1=18.3, R2=18.6	USNO-B1
175.0	327.5282	57.5641	B2=20.6, I=17.4, R1=18.7, R2=18.4	USNO-B1
175.2	327.5286	57.5641	I=17.8, R1=18.7	USNO-B1
175.4	327.5131	57.4677	B2=19.9, R2=18.0	USNO-B1
175.9	327.4551	57.4778	B2=15.5, I=12.5, R1=13.8, R2=13.8	USNO-B1
176.3	327.4693	57.5600	B2=20.5, I=15.5, R1=17.8, R2=16.9	USNO-B1
176.6	327.5116	57.4673	B2=20.3, I=16.2, R1=18.8, R2=17.4	USNO-B1
176.9	327.4603	57.5573	R1=18.3, R2=18.2	USNO-B1
176.9	327.4622	57.5580	B1=19.6, R2=17.4	USNO-B1
177.1	327.5822	57.4855	B1=19.9, B2=19.6, I=17.7, R1=18.1, R2=17.0	USNO-B1
177.1	327.5783	57.4831	B1=18.9, B2=18.6, I=16.0, R1=17.2, R2=17.1	USNO-B1
178.1	327.4701	57.5608	I=18.3, R2=17.1	USNO-B1
178.7	327.4954	57.4675	B2=20.3, I=16.8, R1=18.5, R2=18.5	USNO-B1
179.6	327.5149	57.5662	B2=20.4, I=18.4, R1=19.1, R2=19.0	USNO-B1
179.8	327.5831	57.4849	B1=19.8, B2=20.2, I=18.0, R2=18.1	USNO-B1
179.8	327.5438	57.4697	I=18.4, R2=19.1	USNO-B1
180.7	327.5784	57.5512	B1=20.1, B2=20.6, I=18.3, R2=19.6	USNO-B1
181.4	327.4732	57.4703	B1=18.0, B2=17.9, I=14.9, R1=16.3, R2=16.5	USNO-B1
183.1	327.5037	57.4657	I=17.8, R2=18.4	USNO-B1
184.1	327.5350	57.5659	I=17.8, R1=19.1	USNO-B1
185.2	327.4328	57.5462	B2=20.0, R2=19.2	USNO-B1
185.3	327.4318	57.5455	B2=17.8, R1=19.1	USNO-B1
186.1	327.5853	57.4836	B2=20.0, I=17.9, R2=17.1	USNO-B1
186.5	327.4763	57.4681	B2=20.1, R2=17.9	USNO-B1
186.6	327.5476	57.5643	B2=20.6, I=18.2, R1=19.4, R2=19.1	USNO-B1
187.1	327.4154	57.5249	B2=18.5, I=13.6	USNO-B1
187.4	327.4154	57.5254	B2=19.8, I=15.0	USNO-B1
187.5	327.5220	57.5681	B1=18.4, B2=20.3, I=17.1, R2=17.5	USNO-B1
187.6	327.4759	57.4678	B2=19.2, I=16.3, R1=17.9, R2=17.6	USNO-B1
188.6	327.5907	57.5465	I=18.4, R1=17.1, R2=19.5	USNO-B1
189.0	327.4662	57.5631	B2=20.1, I=17.3, R1=17.9, R2=17.8	USNO-B1
189.1	327.6073	57.5076	B2=20.1, I=17.4, R1=18.6, R2=18.5	USNO-B1
189.4	327.5224	57.5687	I=16.8, R1=18.0, R2=16.2	USNO-B1
189.6	327.5565	57.4698	B2=20.5, I=17.1, R2=17.5	USNO-B1
190.4	327.5425	57.4663	B2=20.3, I=17.9	USNO-B1
190.7	327.4133	57.5241	B2=20.5, I=17.5, R1=17.7, R2=18.7	USNO-B1
191.2	327.5865	57.5507	I=18.1, R1=19.0, R2=18.8	USNO-B1
191.3	327.5204	57.4635	B2=20.5, I=17.9, R2=19.1	USNO-B1
191.8	327.5230	57.5693	B1=19.9, R1=16.8	USNO-B1
193.2	327.4132	57.5277	B1=19.5, R1=18.3, R2=17.6	USNO-B1
193.4	327.6095	57.5255	B2=19.5, I=17.6, R1=17.9	USNO-B1
193.8	327.5600	57.4695	B2=20.3, I=17.9, R1=18.5, R2=18.0	USNO-B1
193.9	327.4682	57.5651	B1=19.9, B2=20.7, I=17.9, R2=18.7	USNO-B1
194.1	327.6095	57.5265	B2=19.9, I=18.0, R1=17.7	USNO-B1
194.2	327.4599	57.4699	B2=20.6, I=17.5, R2=19.9	USNO-B1
195.5	327.4297	57.5488	I=17.9, R1=19.2	USNO-B1
195.8	327.4599	57.5634	B1=19.5, B2=20.3, I=18.0, R1=18.2, R2=17.6	USNO-B1
196.7	327.4291	57.5489	B2=20.6, I=17.9, R1=18.3, R2=18.9	USNO-B1
198.2	327.5721	57.4722	B2=20.6, I=18.2, R2=19.1	USNO-B1
198.4	327.5947	57.4847	I=18.4, R1=18.7	USNO-B1
198.9	327.4258	57.5475	B2=20.8, I=18.3, R1=18.7, R2=19.4	USNO-B1
199.1	327.4470	57.5598	R1=18.4, R2=18.3	USNO-B1
199.1	327.4837	57.5698	I=18.4, R1=17.9, R2=19.1	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