Swift Trigger: 1205744;

Presumed name: GRB 240101B

BAT	23^h 28^m 12.48^s, +51° 38′ 42.0″
position:	(352.052, +51.645 ± 180″)
XRT	23^h 28^m 23.18^s, +51° 38′ 16.4″
position:	(352.0966, 51.6379 ± 5.1″)
UVOT	No position available.
Galactic N_HI:	1.80×10²¹ cm^-2
Galactic E(B-V):	0.246 mag

Best RA:	23^h 28^m 23.18^s	= 352.0966 d
Best Dec:	+51° 38′ 16.4″	= 51.6379 d

Gal Lat:	-9.15
Gal Long:	110.06

Sun angle:	96.68°, -4.7 hr East of Sun

Galaxies within 200 of XRT position

	RA*	Dec*	Redshift		Catalogue
19.3	352.0946	51.6328			NED
25.4	352.1079	51.6389			NED
30.9	352.1067	51.6320		B2=19.8, R2=17.7	USNO-B1
31.1	352.1067	51.6436			NED
31.5	352.1067	51.6317			NED
31.7	352.0933	51.6294			NED
32.1	352.1108	51.6364	0.045445	Mag=11.5	NED
32.2	352.1108	51.6365		h=12.2, j=13.0, k=11.8	2MASS
37.8	352.0819	51.6431		B2=20.4, R1=19.2, R2=19.3	USNO-B1
38.0	352.0886	51.6472		B2=20.0, I=18.6, R1=18.3, R2=18.8	USNO-B1
38.5	352.0792	51.6383			NED
38.7	352.1129	51.6344			NED
41.8	352.0821	51.6306			NED
43.7	352.1029	51.6264			NED
46.3	352.0758	51.6394			NED
46.4	352.0875	51.6494			NED
46.5	352.0878	51.6496		B1=19.7, B2=18.4, I=18.0, R1=18.2, R2=17.8	USNO-B1
47.8	352.0754	51.6398		B1=16.9, B2=15.8, I=14.4, R1=15.1, R2=14.5	USNO-B1
48.0	352.0754	51.6397			NED
50.4	352.1171	51.6322			NED
50.5	352.0742	51.6400			NED
52.5	352.0733	51.6356			NED
53.0	352.1100	51.6500			NED
56.1	352.1188	51.6452		B2=21.1, R1=19.2, R2=19.2	USNO-B1
56.6	352.1137	51.6264			NED
56.8	352.0775	51.6275			NED
58.1	352.0825	51.6514	-0.000463		NED
58.5	352.1046	51.6225			NED
59.7	352.1208	51.6309		B2=19.7, I=17.8, R1=18.1, R2=18.0	USNO-B1
60.1	352.1208	51.6308			NED
61.2	352.0708	51.6319			NED
61.4	352.1051	51.6217		B1=20.5, R1=15.2	USNO-B1
63.1	352.0763	51.6500			NED
64.9	352.0713	51.6289			NED
65.6	352.0958	51.6197			NED
66.1	352.1117	51.6222			NED
67.4	352.1225	51.6286			NED
67.9	352.0825	51.6547			NED
68.5	352.1246	51.6456			NED
69.3	352.1250	51.6303			NED
70.0	352.0746	51.6239			NED
70.9	352.0650	51.6350			NED
71.6	352.1179	51.6230		B1=19.6, B2=21.2, R1=18.5	USNO-B1
71.8	352.1271	51.6319			NED
72.5	352.0917	51.6181			NED
73.8	352.0771	51.6214			NED
74.8	352.1106	51.6190		I=17.8, R1=17.4	USNO-B1
75.9	352.1287	51.6311			NED
76.6	352.1117	51.6189			NED
77.6	352.0617	51.6383			NED
78.2	352.1287	51.6294			NED
78.9	352.1021	51.6164			NED
79.0	352.1050	51.6592		B2=19.8, R1=19.0, R2=19.1	USNO-B1
80.3	352.0825	51.6586			NED
80.5	352.1314	51.6436		B1=20.1, B2=20.2, R1=19.2, R2=19.2	USNO-B1
81.6	352.0786	51.6182		B2=21.0, R1=19.1, R2=19.3	USNO-B1
82.7	352.1096	51.6594			NED
85.7	352.1192	51.6186			NED
85.9	352.0838	51.6156			NED
86.3	352.0833	51.6154		I=18.1, R1=18.0, R2=18.4	USNO-B1
87.0	352.0683	51.6544			NED
87.5	352.0683	51.6547		B1=18.5, B2=17.9, I=16.6, R1=16.7, R2=16.8	USNO-B1
89.4	352.0603	51.6483		B1=20.0, B2=18.7, I=18.4, R1=18.4, R2=18.5	USNO-B1
91.4	352.1029	51.6128			NED
91.9	352.1254	51.6561			NED
92.2	352.1200	51.6169			NED
92.3	352.1062	51.6628			NED
92.6	352.0958	51.6636			NED
93.4	352.0925	51.6119			NED
93.4	352.0549	51.6400		B2=20.7, R1=19.0, R2=18.7	USNO-B1
93.5	352.0600	51.6505		B1=19.8, B2=19.4, I=18.4, R1=18.7, R2=18.9	USNO-B1
94.0	352.0596	51.6503			NED
94.4	352.1383	51.6338		B1=17.0, B2=16.3, I=14.7, R1=15.1, R2=15.3	USNO-B1
94.4	352.1383	51.6336			NED
94.7	352.0617	51.6528			NED
94.8	352.0550	51.6430		B1=18.5, R1=18.8	USNO-B1
95.7	352.0751	51.6149		B1=17.8, B2=17.0, I=16.4, R1=16.3, R2=16.5	USNO-B1
95.9	352.0750	51.6147			NED
96.1	352.0542	51.6428			NED
97.4	352.0736	51.6149		B2=19.8, R1=18.4, R2=18.9	USNO-B1
97.4	352.0775	51.6622			NED
97.8	352.0536	51.6431		B1=18.2, B2=17.4, I=16.7, R1=16.9, R2=16.8	USNO-B1
97.8	352.0533	51.6431			NED
99.0	352.0600	51.6222			NED
99.8	352.1237	51.6600			NED
101.9	352.1412	51.6439			NED
104.3	352.0792	51.6108			NED
104.6	352.1171	51.6119			NED
105.8	352.0812	51.6658			NED
105.9	352.0508	51.6300			NED
106.2	352.1424	51.6459		B1=18.6, B2=18.9, R2=19.2	USNO-B1
107.0	352.1354	51.6553		B1=17.0, I=18.7, R2=19.2	USNO-B1
107.7	352.0777	51.6654		B1=20.0, B2=20.1, R1=19.2, R2=19.2	USNO-B1
107.8	352.0483	51.6378			NED
110.0	352.0525	51.6517			NED
110.0	352.1273	51.6140		B1=17.5, B2=16.8, I=15.9, R1=16.1, R2=16.1	USNO-B1
110.2	352.1271	51.6139			NED
112.2	352.0842	51.6681			NED
112.9	352.0517	51.6522		B1=18.5, B2=15.7, R1=15.5	USNO-B1
113.8	352.0512	51.6525	0.076615		NED
113.8	352.0587	51.6167			NED
113.8	352.0513	51.6523		h=13.4, j=14.4, k=12.9	2MASS
114.1	352.1333	51.6600			NED
114.8	352.1062	51.6067			NED
114.8	352.0667	51.6639			NED
115.3	352.0962	51.6700			NED
115.7	352.1386	51.6567		B1=16.9, B2=16.2, I=15.0, R1=15.4, R2=15.4	USNO-B1
115.9	352.1388	51.6567			NED
116.0	352.1458	51.6481			NED
116.1	352.1067	51.6694			NED
116.4	352.0506	51.6531		B1=19.1, B2=16.5	USNO-B1
116.6	352.1200	51.6667			NED
117.0	352.1488	51.6404		B1=16.4, B2=15.9, I=15.4, R1=15.8, R2=15.4	USNO-B1
117.1	352.1021	51.6056			NED
117.1	352.1487	51.6403			NED
117.5	352.1454	51.6256			NED
117.8	352.0787	51.6072			NED
118.2	352.1453	51.6252		I=18.8, R1=19.2, R2=19.3	USNO-B1
118.8	352.0496	51.6536			NED
119.2	352.0925	51.6708			NED
120.2	352.0494	51.6219		B2=20.5, R1=19.2, R2=19.2	USNO-B1
120.2	352.0492	51.6539			NED
120.3	352.1496	51.6328			NED
121.0	352.1487	51.6286			NED
121.2	352.1487	51.6283			NED
121.2	352.1171	51.6067			NED
121.8	352.0489	51.6543		B1=19.2, B2=16.7, R1=16.5	USNO-B1
122.2	352.1513	51.6389			NED
122.5	352.1496	51.6292		I=18.4, R1=17.4	USNO-B1
123.9	352.0482	51.6547		I=16.9, R1=18.1	USNO-B1
123.9	352.0417	51.6433			NED
124.0	352.1237	51.6081			NED
124.9	352.1506	51.6290		B1=20.4, R2=19.4	USNO-B1
125.0	352.0479	51.6549		B1=18.8, I=17.7, R1=17.4	USNO-B1
125.0	352.1192	51.6697			NED
125.7	352.0792	51.6711		B1=17.1, R1=19.0	USNO-B1
126.4	352.0474	51.6552		B1=21.0, R1=18.2	USNO-B1
126.4	352.0796	51.6714			NED
126.7	352.0797	51.6715		B1=17.5, B2=16.7, I=15.8, R1=16.0, R2=16.0	USNO-B1
128.2	352.0396	51.6419			NED
128.3	352.0396	51.6421		B1=18.4, B2=17.6, I=17.5, R1=17.6, R2=17.6	USNO-B1
128.8	352.0393	51.6417		B1=18.9, R2=19.4	USNO-B1
130.3	352.0442	51.6217			NED
130.6	352.0442	51.6219		B1=19.8, B2=18.3, I=17.9, R1=17.9, R2=18.0	USNO-B1
130.8	352.1070	51.6736		B1=18.6, I=18.8, R1=16.8	USNO-B1
130.9	352.1182	51.6041		I=18.1, R1=18.8, R2=18.8	USNO-B1
131.1	352.1029	51.6017			NED
131.7	352.1183	51.6039			NED
131.7	352.0946	51.6745		B1=19.7, B2=19.8, R1=18.9, R2=18.8	USNO-B1
132.3	352.1036	51.6744		B1=19.0, B2=18.5, I=18.2, R1=18.5, R2=18.2	USNO-B1
132.5	352.0950	51.6747			NED
132.6	352.0935	51.6747		B1=19.6, R1=18.7	USNO-B1
133.1	352.1518	51.6240		B1=20.4, I=18.1, R1=19.1, R2=19.0	USNO-B1
134.2	352.0912	51.6750			NED
134.7	352.1521	51.6236			NED
135.0	352.0517	51.6628			NED
135.5	352.0360	51.6389		B2=19.3, I=18.5, R1=18.7, R2=18.6	USNO-B1
136.6	352.0671	51.6711			NED
136.9	352.0592	51.6078			NED
136.9	352.1513	51.6553			NED
137.8	352.0617	51.6694			NED
137.9	352.1554	51.6492			NED
138.9	352.0354	51.6314			NED
139.1	352.0352	51.6316		B1=19.3, B2=17.9, I=18.1, R1=17.9, R2=17.6	USNO-B1
141.4	352.1212	51.6017			NED
141.4	352.1215	51.6018		B1=18.5, B2=17.6, I=17.0, R1=17.1, R2=17.0	USNO-B1
142.1	352.1591	51.6451		B1=20.8, R1=18.1	USNO-B1
142.2	352.0996	51.6772			NED
142.3	352.0575	51.6691		B1=18.6, I=17.9, R1=16.1, R2=18.2	USNO-B1
142.3	352.0997	51.6774		B1=16.2, B2=15.7, I=14.5, R1=14.9, R2=14.7	USNO-B1
142.6	352.1493	51.6156		B2=21.0, I=17.9, R1=19.1, R2=19.2	USNO-B1
142.7	352.1492	51.6154		I=18.6, R1=19.0	USNO-B1
142.9	352.1496	51.6156			NED
143.2	352.1458	51.6125			NED
143.6	352.1183	51.6753			NED
143.7	352.1185	51.6754		B1=18.3, B2=17.8, I=16.9, R1=17.2, R2=17.3	USNO-B1
144.7	352.0354	51.6514			NED
144.9	352.0358	51.6239			NED
145.6	352.1587	51.6497			NED
146.1	352.1539	51.6183		B1=21.3, B2=20.1, R2=19.1	USNO-B1
146.2	352.0471	51.6645		I=18.4, R1=18.8, R2=19.1	USNO-B1
146.5	352.1333	51.6042			NED
146.5	352.0467	51.6644			NED
146.7	352.1333	51.6042			NED
148.3	352.1450	51.6097			NED
150.1	352.1396	51.6700			NED
150.2	352.0292	51.6364			NED
150.2	352.0379	51.6586			NED
150.6	352.1521	51.6617			NED
150.9	352.1395	51.6703		R1=18.9, R2=19.3	USNO-B1
151.3	352.0417	51.6625			NED
152.5	352.0296	51.6464			NED
152.7	352.0297	51.6465		B1=19.4, B2=18.7, R1=18.0, R2=17.4	USNO-B1
153.0	352.0579	51.6731			NED
153.5	352.0771	51.5969			NED
153.7	352.0596	51.6739			NED
154.0	352.1221	51.6775			NED
155.0	352.1026	51.5950		B1=15.8, B2=15.2, I=13.3, R1=13.7, R2=13.6	USNO-B1
155.2	352.1025	51.5950			NED
156.3	352.1154	51.6797			NED
156.6	352.0767	51.6797			NED
156.9	352.0562	51.6023		I=18.3, R1=18.8	USNO-B1
157.3	352.0554	51.6025			NED
158.0	352.0258	51.6364			NED
158.1	352.0986	51.5940		B1=20.3, B2=19.1, I=18.4, R1=18.6, R2=18.7	USNO-B1
158.1	352.0259	51.6364		B1=19.1, B2=18.0, I=17.7, R1=17.5, R2=17.6	USNO-B1
158.3	352.0263	51.6322			NED
158.9	352.1663	51.6467		B1=19.5, B2=19.4, R1=19.0, R2=18.9	USNO-B1
158.9	352.0850	51.6814			NED
159.2	352.1633	51.6531			NED
159.2	352.0462	51.6692			NED
159.4	352.1637	51.6530		I=18.6, R2=19.2	USNO-B1
159.5	352.0683	51.6786			NED
159.6	352.0459	51.6691		B2=21.2, I=18.3, R1=19.2	USNO-B1
159.8	352.0537	51.6736			NED
160.1	352.0681	51.6787		B1=19.4, B2=19.5, I=18.3, R1=18.6, R2=18.2	USNO-B1
161.4	352.1388	51.6014			NED
161.5	352.1083	51.6822			NED
161.5	352.1418	51.6729		B1=20.0, B2=18.4, I=18.0, R1=18.1, R2=18.3	USNO-B1
162.1	352.0510	51.6029		B1=20.9, B2=19.6, I=18.6, R1=18.9, R2=18.9	USNO-B1
162.4	352.1571	51.6628			NED
162.5	352.1573	51.6628		B2=21.1, I=18.6, R1=18.8, R2=19.1	USNO-B1
163.9	352.1487	51.6059		B1=20.2, B2=19.0, I=18.0, R1=18.2, R2=18.1	USNO-B1
164.0	352.0967	51.6833			NED
164.9	352.0246	51.6275			NED
165.2	352.0554	51.5997			NED
166.5	352.0551	51.5995		I=15.6, R1=15.9	USNO-B1
167.5	352.0842	51.5920		B1=20.9, B2=19.2, I=18.5, R1=18.3, R2=18.5	USNO-B1
167.9	352.0383	51.6086			NED
168.2	352.1458	51.6025			NED
168.9	352.1662	51.6194			NED
169.2	352.1233	51.6819			NED
169.4	352.0300	51.6603			NED
169.5	352.1234	51.6819		B1=18.8, B2=18.1, I=17.3, R1=17.2, R2=17.4	USNO-B1
169.5	352.0838	51.5914			NED
169.8	352.1237	51.5939			NED
170.6	352.1533	51.6694			NED
170.9	352.0742	51.5925			NED
171.3	352.0350	51.6096		B1=21.1, B2=20.2, R2=19.2	USNO-B1
171.5	352.0480	51.6748		B1=20.1, B2=18.6, I=18.3, R1=18.5, R2=17.8	USNO-B1
171.7	352.1525	51.6053			NED
171.9	352.1640	51.6149		B1=17.2, B2=16.6, I=15.6, R1=15.6, R2=15.8	USNO-B1
172.0	352.1637	51.6147			NED
172.0	352.1669	51.6185		B1=20.4, B2=19.3, R1=18.5, R2=18.9	USNO-B1
172.6	352.0216	51.6265		B1=20.0, B2=18.7, I=18.3, R1=18.6, R2=18.3	USNO-B1
172.6	352.0904	51.6858			NED
173.0	352.0213	51.6264			NED
173.1	352.1571	51.6081			NED
173.6	352.1421	51.6769			NED
174.1	352.0225	51.6233			NED
174.4	352.1472	51.6748		B1=19.6, B2=18.4, I=17.8, R1=18.8, R2=18.3	USNO-B1
174.6	352.1746	51.6409		B1=13.9, B2=13.4, I=12.3, R1=12.7, R2=12.6	USNO-B1
174.7	352.1187	51.5914			NED
174.8	352.1746	51.6408			NED
175.1	352.0183	51.6367			NED
175.7	352.0883	51.5894			NED
175.8	352.1643	51.6131		B1=20.6, B2=19.0, R1=18.1, R2=18.4	USNO-B1
176.3	352.1429	51.6775		B1=14.8, I=16.4	USNO-B1
176.6	352.0342	51.6681			NED
176.7	352.0340	51.6680		B1=19.4, B2=18.2, I=18.1, R1=17.9, R2=17.9	USNO-B1
177.6	352.1200	51.6850			NED
178.0	352.1199	51.6852		B1=17.4, B2=16.9, I=15.8, R1=15.9, R2=16.3	USNO-B1
178.0	352.1495	51.6749		B1=21.0, B2=19.6, I=18.3, R1=18.8, R2=18.8	USNO-B1
178.6	352.1729	51.6522			NED
179.0	352.1442	51.6781			NED
179.9	352.0854	51.6875			NED
179.9	352.0856	51.6874		B1=19.8, B2=18.0, I=17.7, R1=17.6, R2=17.4	USNO-B1
180.2	352.1314	51.5928		B2=20.6, R1=19.0, R2=19.4	USNO-B1
180.4	352.1112	51.5886			NED
181.0	352.1606	51.6071		B1=14.9, B2=14.7, I=13.8, R1=14.1, R2=14.1	USNO-B1
181.1	352.1604	51.6069			NED
181.4	352.1058	51.5878			NED
181.9	352.1500	51.5998		B1=19.8, B2=17.9, I=15.2, R1=16.2, R2=16.5	USNO-B1
182.2	352.1500	51.5997			NED
182.3	352.0192	51.6217			NED
182.3	352.0175	51.6503			NED
182.4	352.0150	51.6403			NED
182.5	352.0150	51.6403		B1=17.9, B2=17.2, I=17.1, R1=16.8, R2=16.7	USNO-B1
182.5	352.0691	51.5902		B2=20.7, R2=19.4	USNO-B1
182.7	352.1500	51.5994			NED
183.5	352.0917	51.5869			NED
184.5	352.0504	51.5956			NED
185.0	352.1367	51.5928			NED
185.1	352.1783	51.6456			NED
185.9	352.0433	51.5981			NED
186.1	352.1002	51.6895		I=18.8, R2=19.3	USNO-B1
186.2	352.0492	51.6803			NED
186.3	352.1796	51.6342			NED
186.6	352.0775	51.6883			NED
186.8	352.0175	51.6208			NED
187.1	352.0775	51.6885		B1=18.1, B2=17.2, I=16.8, R1=16.7, R2=17.0	USNO-B1
187.3	352.1054	51.6896		B1=18.8, B2=18.3, I=18.5, R1=18.3, R2=18.6	USNO-B1
187.7	352.0146	51.6267			NED
188.6	352.1779	51.6244			NED
189.4	352.1808	51.6336			NED
189.5	352.0721	51.5875			NED
189.7	352.1475	51.5958			NED
190.1	352.0112	51.6383			NED
190.9	352.0596	51.5900			NED
191.1	352.0933	51.5847			NED
191.5	352.0392	51.6775			NED
191.6	352.1650	51.6058			NED
192.0	352.0162	51.6569			NED
192.0	352.0392	51.6776		B1=17.2, B2=16.5, I=15.3, R1=15.4, R2=15.7	USNO-B1
192.3	352.1554	51.5989		B1=20.6, B2=20.9	USNO-B1
193.1	352.1252	51.5873		B1=18.1, B2=17.3, I=16.8, R1=16.7, R2=16.9	USNO-B1
193.1	352.0725	51.6894			NED
193.3	352.0108	51.6444			NED
193.5	352.0187	51.6614			NED
193.6	352.1250	51.5872			NED
194.6	352.1255	51.6889		B1=19.8, R1=19.1, R2=19.4	USNO-B1
194.8	352.1478	51.6817		B1=17.5, B2=15.6, I=15.0, R1=15.1, R2=15.3	USNO-B1
195.0	352.0239	51.6679		I=18.5, R2=19.3	USNO-B1
195.2	352.1479	51.6817			NED
195.2	352.0237	51.6678			NED
195.8	352.0088	51.6383			NED
195.8	352.1346	51.6869		I=18.8, R2=19.2	USNO-B1
196.0	352.1773	51.6593		B2=20.4, I=18.6, R1=18.9, R2=19.2	USNO-B1
196.5	352.0558	51.5894			NED
196.6	352.0556	51.5896		B2=21.1, I=17.9, R1=18.7, R2=18.7	USNO-B1
197.4	352.1847	51.6336		R1=18.0, R2=16.6	USNO-B1
198.5	352.1762	51.6136			NED
198.8	352.0135	51.6181		B1=20.5, B2=19.1, I=16.4, R1=17.3, R2=17.5	USNO-B1
198.9	352.1575	51.6783			NED
198.9	352.0133	51.6181			NED
199.0	352.1558	51.6792			NED
199.5	352.1642	51.6742			NED
199.5	352.1640	51.6743		B1=17.5, B2=16.7, I=15.9, R1=16.2, R2=16.4	USNO-B1
199.7	352.1619	51.6001		R1=19.0, R2=19.4	USNO-B1
199.7	352.1754	51.6642			NED
199.9	352.1067	51.5828			NED
200.0	352.1754	51.6639			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