Swift Trigger: 1299967;

Presumed name: GRB 250331C

BAT	05^h 23^m 58.32^s, +33° 01′ 44.4″
position:	(80.993, +33.029 ± 180″)
XRT	05^h 23^m 49.51^s, +33° 03′ 47.4″
position:	(80.95630, 33.06317 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	5.05×10²¹ cm^-2
Galactic E(B-V):	0.892 mag

Best RA:	05^h 23^m 49.51^s	= 80.95630 d
Best Dec:	+33° 03′ 47.4″	= 33.06317 d

Gal Lat:	-1.69
Gal Long:	174

Sun angle:	72.24°, -4.8 hr East of Sun

Galaxies within 200 of XRT position

	RA*	Dec*		Catalogue
7.4	80.9579	33.0617		NED
20.7	80.9500	33.0608		NED
20.9	80.9499	33.0609	B1=18.2, B2=17.4, I=16.4, R1=17.1, R2=16.6	USNO-B1
24.0	80.9625	33.0672		NED
26.5	80.9475	33.0647		NED
26.8	80.9476	33.0648	B1=17.2, B2=16.5, I=15.3, R1=15.7, R2=15.7	USNO-B1
30.4	80.9467	33.0603		NED
31.1	80.9510	33.0558	B1=19.9, B2=19.3, I=17.5, R1=18.1, R2=18.4	USNO-B1
33.3	80.9625	33.0706		NED
34.2	80.9454	33.0656		NED
34.9	80.9504	33.0548	B1=19.1, B2=17.9, I=16.0	USNO-B1
35.1	80.9504	33.0547		NED
38.6	80.9675	33.0581		NED
39.1	80.9658	33.0703		NED
40.3	80.9579	33.0742		NED
40.5	80.9580	33.0743	B1=18.1, B2=17.4, I=16.4, R1=16.8, R2=16.5	USNO-B1
40.6	80.9450	33.0692		NED
41.2	80.9579	33.0744		NED
42.2	80.9471	33.0542		NED
46.0	80.9525	33.0756		NED
47.3	80.9692	33.0558		NED
49.2	80.9475	33.0747		NED
51.8	80.9446	33.0528		NED
53.6	80.9445	33.0743	B1=21.1, B2=20.3, I=18.3, R1=19.1, R2=18.9	USNO-B1
53.8	80.9713	33.0553		NED
56.0	80.9546	33.0478		NED
58.1	80.9756	33.0632	B1=20.1, B2=21.4, I=18.7	USNO-B1
58.9	80.9746	33.0686		NED
60.8	80.9733	33.0719		NED
62.1	80.9396	33.0531		NED
62.6	80.9396	33.0529	B2=20.0, I=18.4, R1=19.4, R2=19.0	USNO-B1
63.2	80.9533	33.0806		NED
63.5	80.9571	33.0456		NED
64.0	80.9429	33.0772		NED
65.0	80.9458	33.0789		NED
65.3	80.9425	33.0492		NED
65.8	80.9424	33.0773	B1=18.6, B2=17.6, I=15.6, R1=16.6	USNO-B1
65.9	80.9685	33.0480	B1=19.8, B2=20.1, I=18.1, R1=18.8, R2=18.8	USNO-B1
66.0	80.9421	33.0772		NED
66.3	80.9354	33.0692		NED
66.3	80.9783	33.0639		NED
66.9	80.9581	33.0817	I=18.6, R1=19.4	USNO-B1
67.3	80.9779	33.0592		NED
67.7	80.9412	33.0772		NED
69.0	80.9347	33.0696	B1=21.1, B2=17.8, I=18.4	USNO-B1
69.2	80.9358	33.0542		NED
69.2	80.9483	33.0453		NED
69.4	80.9638	33.0450		NED
70.1	80.9792	33.0664		NED
70.3	80.9750	33.0747		NED
70.5	80.9629	33.0444	B1=19.7, I=18.1	USNO-B1
71.2	80.9796	33.0665	B1=19.3, B2=17.4, I=16.0, R1=17.0, R2=16.1	USNO-B1
71.8	80.9531	33.0829	B1=19.7, B2=18.7, I=17.8, R1=18.1, R2=18.0	USNO-B1
71.9	80.9588	33.0433		NED
72.0	80.9583	33.0432	I=18.0, R1=18.7	USNO-B1
72.5	80.9458	33.0450		NED
73.7	80.9471	33.0442		NED
73.7	80.9725	33.0478		NED
74.6	80.9325	33.0575		NED
74.7	80.9808	33.0664		NED
75.5	80.9796	33.0553		NED
76.1	80.9313	33.0614		NED
76.3	80.9650	33.0831		NED
76.3	80.9311	33.0614	B1=15.6, B2=14.8, I=12.7, R1=13.8, R2=13.2	USNO-B1
77.5	80.9308	33.0657	B2=20.5, I=17.9, R1=18.8, R2=19.1	USNO-B1
79.4	80.9363	33.0775		NED
79.7	80.9691	33.0438	B1=19.6, B2=20.2, I=18.4, R1=18.8, R2=19.1	USNO-B1
80.3	80.9717	33.0814		NED
80.3	80.9325	33.0533		NED
81.8	80.9621	33.0410	B1=20.3, I=18.7	USNO-B1
81.8	80.9546	33.0858		NED
82.1	80.9547	33.0859	B1=18.6, B2=17.9, I=16.1, R1=16.6, R2=16.6	USNO-B1
83.0	80.9288	33.0639		NED
84.3	80.9839	33.0670	B1=13.6, B2=13.2, I=12.7, R1=12.9, R2=12.7	USNO-B1
84.4	80.9838	33.0669		NED
84.7	80.9701	33.0427	B2=20.1, R2=18.4	USNO-B1
85.3	80.9321	33.0511		NED
85.4	80.9319	33.0511	B2=19.9, I=17.8, R1=18.3, R2=17.5	USNO-B1
86.0	80.9490	33.0401	B1=20.7, I=18.6, R2=19.5	USNO-B1
86.8	80.9783	33.0786		NED
87.7	80.9496	33.0394		NED
87.7	80.9296	33.0725		NED
88.1	80.9638	33.0394		NED
88.7	80.9821	33.0517		NED
89.3	80.9283	33.0547		NED
89.6	80.9367	33.0444		NED
89.9	80.9825	33.0511		NED
89.9	80.9396	33.0839		NED
90.0	80.9796	33.0475	B1=16.2, B2=15.7, I=15.0, R1=15.3, R2=15.2	USNO-B1
90.1	80.9796	33.0478		NED
90.2	80.9308	33.0764		NED
90.4	80.9796	33.0475		NED
91.8	80.9846	33.0725		NED
93.2	80.9338	33.0456		NED
93.6	80.9796	33.0461		NED
94.7	80.9250	33.0606		NED
95.2	80.9274	33.0525	B2=21.2, I=18.6, R1=19.5, R2=18.4	USNO-B1
95.5	80.9550	33.0367		NED
95.7	80.9325	33.0457	I=18.6, R2=18.4	USNO-B1
96.8	80.9242	33.0656		NED
97.4	80.9575	33.0903		NED
97.9	80.9517	33.0364		NED
97.9	80.9858	33.0519		NED
98.2	80.9244	33.0686	B1=20.2, B2=19.7, I=17.6, R1=18.4, R2=18.3	USNO-B1
98.2	80.9592	33.0903		NED
98.5	80.9242	33.0686		NED
98.6	80.9825	33.0794		NED
98.9	80.9558	33.0358		NED
99.0	80.9616	33.0360	B1=20.4, B2=20.5, I=18.4, R2=19.2	USNO-B1
99.8	80.9737	33.0867		NED
99.9	80.9563	33.0356		NED
100.4	80.9671	33.0894		NED
101.9	80.9225	33.0603		NED
102.9	80.9292	33.0456		NED
103.2	80.9754	33.0869		NED
103.3	80.9788	33.0847		NED
103.3	80.9285	33.0465	B1=21.1, B2=19.9, I=17.8, R1=18.8, R2=18.3	USNO-B1
103.8	80.9758	33.0394		NED
104.0	80.9217	33.0642		NED
104.5	80.9488	33.0917		NED
104.8	80.9489	33.0916	B1=15.8, B2=15.6, I=14.6, R1=14.9, R2=14.8	USNO-B1
105.4	80.9733	33.0889		NED
105.6	80.9883	33.0519		NED
106.9	80.9429	33.0908		NED
107.0	80.9742	33.0889		NED
107.3	80.9258	33.0786		NED
110.3	80.9830	33.0841	B1=18.7, B2=20.0, R2=18.3	USNO-B1
110.7	80.9929	33.0664		NED
111.2	80.9429	33.0344		NED
111.8	80.9471	33.0331	B1=19.1, B2=18.2, I=16.4, R1=17.0, R2=16.6	USNO-B1
112.0	80.9471	33.0331		NED
112.2	80.9471	33.0331		NED
112.8	80.9732	33.0352	B1=18.4, B2=17.4, I=16.1, R1=16.6, R2=16.5	USNO-B1
113.5	80.9733	33.0350		NED
114.8	80.9858	33.0833		NED
114.9	80.9858	33.0834	B2=20.8, I=17.6, R1=19.2, R2=18.7	USNO-B1
115.7	80.9763	33.0906		NED
115.9	80.9696	33.0331		NED
116.7	80.9725	33.0925		NED
116.9	80.9296	33.0869		NED
118.6	80.9454	33.0950		NED
119.3	80.9596	33.0300		NED
120.4	80.9671	33.0953		NED
120.8	80.9670	33.0955	B1=17.3, B2=16.8, I=15.5, R1=15.7, R2=15.4	USNO-B1
120.9	80.9358	33.0343	B2=20.9, R2=19.3	USNO-B1
121.0	80.9679	33.0311		NED
121.3	80.9354	33.0344		NED
121.4	80.9929	33.0772	B1=17.8, B2=17.5, I=15.6, R1=16.1, R2=15.9	USNO-B1
121.5	80.9356	33.0342	B2=21.0, I=18.4, R2=18.9	USNO-B1
121.5	80.9929	33.0772		NED
121.6	80.9179	33.0731		NED
121.6	80.9513	33.0297		NED
122.1	80.9963	33.0669		NED
122.2	80.9271	33.0397		NED
122.5	80.9446	33.0306		NED
122.8	80.9821	33.0894		NED
122.8	80.9450	33.0306		NED
124.2	80.9975	33.0611		NED
124.3	80.9554	33.0286	I=18.4, R2=19.7	USNO-B1
124.7	80.9904	33.0825		NED
124.7	80.9637	33.0291	B1=17.5, B2=16.6, I=15.5, R1=15.8, R2=15.9	USNO-B1
124.9	80.9638	33.0292		NED
125.8	80.9283	33.0372		NED
126.1	80.9313	33.0350		NED
127.6	80.9971	33.0539	B1=17.1, B2=16.6, I=15.2, R1=15.9, R2=15.7	USNO-B1
127.7	80.9683	33.0972		NED
128.0	80.9971	33.0539		NED
128.6	80.9325	33.0928		NED
129.5	80.9171	33.0781		NED
129.7	80.9354	33.0947		NED
130.6	80.9479	33.0275		NED
131.5	80.9129	33.0669		NED
131.8	80.9825	33.0339		NED
133.3	80.9479	33.0269		NED
133.5	80.9450	33.0989		NED
133.6	80.9692	33.0986		NED
133.7	80.9400	33.0286		NED
133.7	80.9482	33.0267	B1=19.5, B2=18.5, I=16.8, R1=17.6, R2=16.6	USNO-B1
134.0	80.9957	33.0803	B2=21.2, R1=19.4	USNO-B1
134.5	80.9588	33.0258		NED
134.8	80.9692	33.0989		NED
134.9	80.9483	33.0264		NED
135.2	80.9500	33.1003		NED
135.3	80.9950	33.0442		NED
135.5	80.9499	33.1004	B1=16.6, B2=16.1, I=14.6, R1=15.4, R2=15.1	USNO-B1
135.7	80.9871	33.0356		NED
136.3	80.9954	33.0444		NED
137.0	80.9963	33.0450		NED
137.4	80.9196	33.0406		NED
137.7	80.9861	33.0921	B2=19.1, I=18.2, R1=19.1, R2=18.5	USNO-B1
139.1	80.9896	33.0900		NED
139.7	80.9100	33.0600		NED
140.2	80.9196	33.0869		NED
141.1	80.9192	33.0872		NED
141.6	80.9179	33.0408		NED
141.7	80.9960	33.0421	B1=19.8, B2=18.1, I=16.2, R1=17.9	USNO-B1
141.9	80.9705	33.0256	B1=17.3, B2=16.7, I=15.2, R1=15.5, R2=15.9	USNO-B1
142.1	80.9704	33.0256		NED
142.3	80.9958	33.0417		NED
142.6	80.9100	33.0719		NED
142.7	80.9933	33.0386		NED
142.8	80.9286	33.0953	B2=21.0, I=18.6, R1=19.5, R2=19.2	USNO-B1
142.9	81.0033	33.0664		NED
143.1	80.9237	33.0920	B2=21.0, I=18.5, R1=19.5, R2=19.3	USNO-B1
143.1	80.9098	33.0552	R1=19.3, R2=19.1	USNO-B1
143.4	81.0038	33.0664		NED
143.5	80.9313	33.0972		NED
143.8	80.9775	33.0275		NED
144.1	81.0042	33.0625		NED
144.7	80.9092	33.0558		NED
145.0	80.9167	33.0858		NED
145.4	80.9166	33.0860	B1=20.7, B2=19.7, I=17.4, R1=18.1, R2=17.5	USNO-B1
145.6	80.9087	33.0708		NED
145.8	80.9083	33.0567		NED
146.6	80.9958	33.0394		NED
146.6	80.9083	33.0561		NED
146.7	80.9084	33.0564	B1=18.8, B2=17.3, R2=15.9	USNO-B1
146.9	80.9238	33.0328		NED
148.3	80.9921	33.0914		NED
148.3	80.9879	33.0317		NED
148.3	80.9792	33.0267		NED
148.4	80.9921	33.0915	B1=19.0, B2=18.2, I=16.7, R1=17.4, R2=17.3	USNO-B1
149.0	80.9792	33.0267		NED
149.4	80.9103	33.0478	B2=20.5, I=18.3, R1=19.1	USNO-B1
149.7	80.9383	33.0244	B2=20.3, I=18.2	USNO-B1
149.8	80.9073	33.0565	B2=18.0, R1=17.9, R2=16.9	USNO-B1
150.3	80.9100	33.0478	B2=20.6, I=18.4, R1=19.1, R2=18.7	USNO-B1
151.3	80.9067	33.0564		NED
151.5	81.0062	33.0661		NED
151.6	80.9746	33.0239		NED
152.0	80.9537	33.1053		NED
152.0	80.9846	33.0283		NED
152.3	80.9163	33.0892		NED
152.5	81.0067	33.0658		NED
153.2	80.9120	33.0840	B1=21.4, B2=21.1	USNO-B1
153.4	80.9121	33.0842		NED
153.4	81.0067	33.0581		NED
153.6	80.9933	33.0342		NED
153.7	80.9087	33.0481		NED
153.7	80.9096	33.0806		NED
154.5	80.9129	33.0406		NED
155.1	80.9092	33.0808		NED
156.7	80.9379	33.0225		NED
156.7	80.9108	33.0419		NED
156.9	80.9042	33.0628		NED
157.0	80.9042	33.0667		NED
157.6	80.9063	33.0503		NED
157.6	80.9064	33.0503	B1=20.6, B2=21.4, R1=19.3	USNO-B1
158.0	80.9086	33.0812	B1=18.8, B2=18.4, I=16.8	USNO-B1
158.2	80.9083	33.0811		NED
159.0	80.9637	33.1069	B1=18.4, B2=17.8, I=16.2, R1=16.6, R2=16.0	USNO-B1
159.0	80.9638	33.1069		NED
159.0	80.9817	33.1019		NED
160.4	80.9537	33.1078		NED
160.4	80.9183	33.0319		NED
160.7	80.9846	33.0256		NED
161.3	80.9099	33.0409	B1=19.3, B2=17.5	USNO-B1
162.1	80.9913	33.0289		NED
162.5	80.9915	33.0290	B2=20.6, R2=19.5	USNO-B1
162.5	80.9529	33.0181		NED
163.3	80.9033	33.0542		NED
163.8	81.0048	33.0427	B1=21.0, B2=19.8	USNO-B1
163.9	80.9104	33.0878		NED
164.0	80.9204	33.0289		NED
164.2	80.9105	33.0878	B1=18.5, B2=17.7, I=15.8, R1=16.9, R2=16.6	USNO-B1
165.2	80.9537	33.0172		NED
165.3	80.9913	33.0986		NED
165.4	81.0071	33.0800		NED
165.5	80.9092	33.0400		NED
165.7	80.9537	33.0172		NED
166.1	80.9267	33.1022		NED
166.4	80.9268	33.1022	B1=16.3, B2=15.6, I=13.0, R1=13.7, R2=13.6	USNO-B1
166.8	81.0116	33.0647	I=17.9, R1=19.2, R2=19.1	USNO-B1
166.9	80.9496	33.1092		NED
167.0	80.9971	33.0319		NED
167.0	80.9497	33.1092	B1=19.8, B2=18.1, I=17.1, R1=17.6, R2=17.1	USNO-B1
167.3	81.0117	33.0647		NED
167.6	80.9967	33.0950		NED
168.3	80.9792	33.0206		NED
168.5	80.9533	33.1100		NED
169.5	80.9896	33.0253		NED
169.8	81.0120	33.0564	B2=20.9, R2=19.7	USNO-B1
170.0	80.9379	33.0186		NED
170.3	80.9002	33.0583	B1=20.3, B2=20.9, R1=18.8	USNO-B1
170.7	81.0038	33.0889		NED
170.9	81.0108	33.0764		NED
170.9	80.9210	33.0261	B1=20.9, B2=20.1, I=17.3, R2=18.6	USNO-B1
171.7	80.9213	33.0256		NED
172.0	81.0036	33.0365	B2=21.0, I=18.6, R1=19.1, R2=19.6	USNO-B1
172.1	80.8996	33.0586		NED
172.4	81.0021	33.0347		NED
172.5	80.8994	33.0585	B1=20.8, B2=19.4, I=17.6, R1=18.6, R2=18.4	USNO-B1
173.0	80.9862	33.0222		NED
173.3	80.9458	33.1106		NED
173.5	80.9329	33.0192		NED
173.7	80.9154	33.0289		NED
173.8	80.9454	33.0158		NED
173.8	80.9742	33.1089		NED
174.4	80.9867	33.0219		NED
175.1	80.9546	33.0144		NED
175.6	80.9054	33.0869		NED
175.8	80.9358	33.1089		NED
175.9	80.9625	33.1117		NED
176.7	80.8988	33.0544		NED
176.8	80.9213	33.0239		NED
176.8	80.9058	33.0383		NED
177.0	81.0050	33.0906		NED
177.5	80.9721	33.1106		NED
177.7	80.9483	33.1122		NED
178.4	80.9633	33.0139		NED
178.8	80.9917	33.1031		NED
178.9	80.9013	33.0822		NED
179.5	80.9876	33.0208	B2=19.1, I=17.3, R1=17.9, R2=17.9	USNO-B1
179.7	80.9531	33.0133	B2=20.6, I=17.5, R2=17.9	USNO-B1
179.7	80.8971	33.0586		NED
179.7	80.9297	33.1078	R1=19.3, R2=19.4	USNO-B1
179.8	80.9013	33.0819		NED
179.9	80.9796	33.1092		NED
179.9	80.9875	33.0206		NED
180.1	80.8969	33.0585	B1=19.9, B2=18.3, I=16.8, R1=18.1, R2=17.5	USNO-B1
180.3	80.9142	33.0986		NED
180.3	80.9846	33.0192		NED
182.4	80.8967	33.0539		NED
183.8	80.8996	33.0447		NED
184.0	80.9542	33.0122		NED
184.0	80.8994	33.0449	B1=16.5, B2=15.8, I=14.7, R1=15.6, R2=14.9	USNO-B1
184.0	81.0158	33.0525		NED
184.1	80.9542	33.0119		NED
184.6	80.9104	33.0972		NED
184.7	80.9171	33.0239		NED
184.9	80.9104	33.0973	B1=18.5, B2=17.8, I=16.4, R1=17.2, R2=16.7	USNO-B1
185.1	80.9667	33.0125		NED
185.3	80.9656	33.0123	B1=16.6, B2=15.8, I=14.1, R1=14.6, R2=14.6	USNO-B1
185.4	80.9417	33.0131		NED
185.5	80.9254	33.0186		NED
185.8	80.9658	33.0122		NED
185.8	80.8978	33.0471	B1=16.8, B2=16.1, I=14.9, R1=16.1, R2=14.9	USNO-B1
185.8	80.8975	33.0472		NED
186.2	80.9654	33.0119		NED
186.6	80.9188	33.1044		NED
187.3	81.0088	33.0356		NED
187.3	80.9221	33.1067		NED
187.4	80.9496	33.0114		NED
187.4	80.9679	33.0119		NED
187.7	81.0089	33.0354	B2=20.1, I=18.2, R1=19.2, R2=18.8	USNO-B1
187.7	80.9404	33.1136	B2=21.1, I=18.0, R1=19.5, R2=19.2	USNO-B1
187.7	80.9404	33.1136		NED
187.9	80.8938	33.0628		NED
187.9	80.9779	33.0142	B1=20.4, I=18.7, R2=19.5	USNO-B1
187.9	80.9289	33.1100	R1=19.7, R2=19.4	USNO-B1
189.0	81.0113	33.0383		NED
189.3	81.0058	33.0954	B2=21.2, R2=19.7	USNO-B1
189.4	81.0150	33.0819		NED
189.6	81.0122	33.0391	B2=18.6, I=17.4	USNO-B1
189.7	81.0018	33.0996	B2=20.1, R1=19.1, R2=19.0	USNO-B1
190.3	80.9779	33.0136		NED
190.9	80.8933	33.0586		NED
191.0	81.0133	33.0862	B1=19.5, B2=18.5, I=17.2, R1=17.8, R2=17.3	USNO-B1
191.2	81.0133	33.0861		NED
193.2	80.9754	33.0119		NED
194.0	80.9942	33.0197		NED
194.2	80.9895	33.0170	B1=20.1, B2=19.2, I=17.8, R1=17.7, R2=17.3	USNO-B1
194.5	80.9017	33.0347		NED
194.6	80.9896	33.0169		NED
194.7	80.9017	33.0344	I=18.6, R2=19.3	USNO-B1
194.9	80.9490	33.1170	B2=20.2, I=18.2, R1=18.8, R2=18.6	USNO-B1
194.9	80.9350	33.0119		NED
195.1	80.9488	33.1169		NED
195.5	81.0033	33.1006		NED
196.1	80.8917	33.0564		NED
196.6	80.9133	33.0219		NED
196.7	80.8983	33.0381		NED
197.8	81.0217	33.0631		NED
197.9	80.9832	33.1133	I=18.7, R1=18.6	USNO-B1
198.2	80.8904	33.0614		NED
198.3	80.9167	33.1072		NED
198.9	80.9167	33.1073	B1=18.5, I=18.4, R2=19.4	USNO-B1
198.9	80.8963	33.0406		NED
199.2	80.9458	33.1178		NED
199.6	80.9275	33.0133		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