Swift Trigger: 1290305;

Presumed name: GRB 250221A

BAT	03^h 57^m 54.48^s, -15° 08′ 20.4″
position:	(59.477, -15.139 ± 180″)
XRT	03^h 57^m 51.03^s, -15° 08′ 01.3″
position:	(59.46261, -15.13369 ± 1.9″)
UVOT	03^h 57^m 50.98^s, -15° 07′ 59.2″
position:	(59.4624, -15.1331 ± 1.1″)
Galactic N_HI:	3.15×10²⁰ cm^-2
Galactic E(B-V):	0.053 mag

Best RA:	03^h 57^m 50.98^s	= 59.4624 d
Best Dec:	-15° 07′ 59.2″	= -15.1331 d

Gal Lat:	-45.18
Gal Long:	207.23

Sun angle:	82.58°, -5.7 hr East of Sun

Galaxies within 200 of XRT position

	RA*	Dec*		Catalogue
0.4	59.4625	-15.1331		NED
16.8	59.4642	-15.1375		NED
29.2	59.4563	-15.1386		NED
35.2	59.4612	-15.1428		NED
40.6	59.4667	-15.1228		NED
41.2	59.4671	-15.1436		NED
41.6	59.4742	-15.1336		NED
48.8	59.4504	-15.1256		NED
49.0	59.4488	-15.1297		NED
51.9	59.4475	-15.1353		NED
52.1	59.4477	-15.1354	B2=21.0, I=18.3, R2=19.2	USNO-B1
52.1	59.4477	-15.1354	B=20.7, R2=19.5, i=19.1	SSS
55.1	59.4771	-15.1272		NED
55.5	59.4642	-15.1483		NED
56.0	59.4583	-15.1181		NED
59.6	59.4792	-15.1356		NED
60.4	59.4792	-15.1289		NED
70.4	59.4671	-15.1522		NED
72.4	59.4592	-15.1133		NED
72.7	59.4521	-15.1153		NED
75.7	59.4417	-15.1400		NED
82.6	59.4850	-15.1258		NED
82.9	59.4754	-15.1139		NED
84.8	59.4729	-15.1551	B1=18.8, B2=18.6, I=17.4, R1=17.6, R2=17.5	USNO-B1
85.3	59.4729	-15.1552	B=18.8, R2=17.1, i=17.5	SSS
85.4	59.4404	-15.1222		NED
86.5	59.4728	-15.1556	B1=20.6, R2=19.1	USNO-B1
87.2	59.4729	-15.1550	Mag=18.99	NED
88.5	59.4529	-15.1561		NED
89.1	59.4529	-15.1100		NED
91.9	59.4531	-15.1099	B=21.2, R2=19.7	SSS
93.2	59.4354	-15.1325		NED
94.2	59.4371	-15.1236		NED
94.9	59.4817	-15.1144		NED
96.2	59.4783	-15.1114		NED
97.1	59.4642	-15.1600		NED
97.4	59.4863	-15.1472		NED
97.6	59.4421	-15.1144		NED
98.0	59.4775	-15.1561		NED
99.5	59.4475	-15.1094		NED
99.7	59.4908	-15.1391	R1=19.3, R2=19.3	USNO-B1
102.0	59.4808	-15.1553		NED
102.4	59.4521	-15.1597		NED
104.3	59.4542	-15.1611		NED
106.4	59.4346	-15.1203		NED
107.9	59.4395	-15.1537	B1=20.6, I=18.5	USNO-B1
108.2	59.4313	-15.1356	Mag=20.37	NED
108.2	59.4621	-15.1631		NED
109.2	59.4312	-15.1355	B=20.1, R2=18.6, i=18.9	SSS
109.2	59.4312	-15.1355	B1=20.4, B2=21.0, I=18.2, R2=19.2	USNO-B1
112.2	59.4416	-15.1574	B1=20.5, R2=19.2	USNO-B1
115.5	59.4850	-15.1097		NED
115.9	59.4458	-15.1053		NED
116.0	59.4604	-15.1653		NED
116.4	59.4850	-15.1096	B1=20.0, B2=20.7, I=16.3, R1=17.8, R2=17.6	USNO-B1
116.6	59.4829	-15.1586		NED
118.8	59.4421	-15.1073	B=21.7	SSS
119.0	59.4417	-15.1594		NED
119.3	59.4946	-15.1450		NED
121.4	59.4671	-15.1664		NED
121.9	59.4377	-15.1098	B1=20.6, R1=19.3	USNO-B1
122.8	59.4971	-15.1383		NED
125.2	59.4925	-15.1139		NED
125.4	59.4360	-15.1102	B1=20.5, R1=19.5	USNO-B1
125.5	59.4676	-15.1682	B=21.9	SSS
126.6	59.4727	-15.1675	B=22.0, R2=19.9	SSS
128.3	59.4729	-15.1672		NED
129.8	59.4991	-15.1262	B=21.7	SSS
131.1	59.4942	-15.1525		NED
132.1	59.4784	-15.1671	B1=20.6, B2=20.9, I=18.4, R1=19.5, R2=19.2	USNO-B1
132.4	59.4308	-15.1539		NED
133.1	59.4383	-15.1044		NED
133.8	59.4563	-15.1697		NED
134.5	59.4283	-15.1508		NED
135.9	59.4783	-15.1675		NED
136.0	59.4338	-15.1589		NED
136.3	59.4308	-15.1106		NED
138.1	59.4717	-15.0958		NED
138.2	59.4246	-15.1208		NED
138.7	59.5021	-15.1308		NED
140.5	59.5013	-15.1436		NED
140.8	59.4717	-15.1711		NED
141.5	59.4975	-15.1528		NED
143.2	59.4387	-15.1658		NED
144.1	59.4996	-15.1158		NED
145.0	59.4675	-15.1731		NED
145.3	59.4806	-15.0973	B=21.9	SSS
146.8	59.4279	-15.1569		NED
147.1	59.4871	-15.1000		NED
147.2	59.4454	-15.0956		NED
147.4	59.4508	-15.1725		NED
147.9	59.5021	-15.1483		NED
148.5	59.4325	-15.1036		NED
148.7	59.4236	-15.1507	B1=20.6, B2=19.9, R2=19.3	USNO-B1
149.6	59.4579	-15.1744		NED
149.8	59.4208	-15.1436		NED
150.6	59.4950	-15.1606		NED
150.7	59.4323	-15.1038	I=18.4, R2=19.3	USNO-B1
150.8	59.4283	-15.1072		NED
151.0	59.4606	-15.1756	B=20.8, R2=19.9	SSS
151.1	59.4662	-15.1755	B=21.2, R2=19.4, i=18.1	SSS
151.8	59.4663	-15.1757	B2=20.9, I=18.3, R1=18.7, R2=19.3	USNO-B1
152.0	59.4188	-15.1311		NED
152.3	59.4358	-15.0994		NED
152.5	59.4226	-15.1511	B=21.5, R2=19.8, i=19.1	SSS
153.2	59.4225	-15.1514		NED
153.5	59.4321	-15.1642		NED
153.8	59.4663	-15.1756		NED
155.4	59.4542	-15.1756		NED
155.8	59.5067	-15.1258		NED
156.5	59.4296	-15.1031		NED
156.8	59.4488	-15.0917		NED
157.7	59.4183	-15.1219		NED
158.4	59.5069	-15.1440	B=20.9, R2=18.9	SSS
158.5	59.5069	-15.1441	B1=20.3, B2=20.8, R1=19.4, R2=19.2	USNO-B1
158.8	59.4471	-15.1747		NED
159.2	59.5000	-15.1081		NED
159.4	59.5069	-15.1452	R1=19.5, R2=19.3	USNO-B1
159.6	59.4383	-15.0953		NED
160.1	59.5071	-15.1444		NED
161.8	59.4908	-15.1686		NED
162.1	59.5067	-15.1475		NED
162.4	59.4521	-15.0892		NED
162.8	59.4246	-15.1600		NED
162.9	59.4217	-15.1108		NED
164.6	59.4808	-15.0911		NED
164.6	59.4517	-15.1778		NED
165.4	59.4450	-15.1758		NED
166.2	59.4810	-15.0911	B=21.6, R2=19.8	SSS
166.5	59.4942	-15.1678		NED
167.1	59.4204	-15.1558		NED
168.5	59.5108	-15.1361		NED
169.1	59.4596	-15.0861		NED
171.8	59.4754	-15.0872		NED
173.2	59.4240	-15.1641	B=19.5, R2=17.8, i=18.5	SSS
173.2	59.4167	-15.1528		NED
173.4	59.4238	-15.1640	B2=20.9, I=17.8, R1=19.0, R2=18.2	USNO-B1
173.5	59.4242	-15.1639	Mag=19.75	NED
174.1	59.5108	-15.1453		NED
174.1	59.4629	-15.1814		NED
175.9	59.4296	-15.0958		NED
176.0	59.5046	-15.1061		NED
176.9	59.4133	-15.1458		NED
177.1	59.5021	-15.1636		NED
178.9	59.4113	-15.1278		NED
180.0	59.4871	-15.1769		NED
180.5	59.4383	-15.1775		NED
182.1	59.4263	-15.0964		NED
182.3	59.4150	-15.1553		NED
182.6	59.5050	-15.1628		NED
183.6	59.4158	-15.1578		NED
183.7	59.4267	-15.0963	B=20.4, R2=18.9	SSS
183.9	59.4096	-15.1308		NED
184.0	59.4183	-15.1050		NED
185.7	59.4725	-15.0825		NED
185.8	59.4450	-15.1819		NED
186.9	59.4833	-15.0853		NED
187.1	59.5025	-15.0986		NED
187.5	59.4428	-15.0853	B1=20.6, R2=18.9	USNO-B1
187.6	59.4100	-15.1200		NED
187.9	59.5162	-15.1336		NED
189.1	59.5158	-15.1425		NED
189.2	59.4900	-15.0881		NED
189.5	59.4113	-15.1511		NED
192.3	59.4542	-15.1858		NED
192.8	59.5175	-15.1369		NED
194.0	59.4783	-15.1847		NED
194.3	59.4896	-15.1803		NED
195.7	59.5179	-15.1422		NED
196.0	59.5054	-15.0978		NED
196.2	59.4942	-15.1783		NED
197.0	59.4250	-15.0919		NED
197.5	59.4542	-15.0789		NED
198.7	59.4842	-15.1842		NED
198.8	59.4208	-15.0950		NED
198.8	59.4963	-15.1775		NED
199.9	59.4200	-15.1708		NED

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