Swift Trigger: 529686;

Presumed name: GRB 120804A

BAT	15^h 35^m 42.96^s, -28° 45′ 39.6″
position:	(233.929, -28.761 ± 180″)
XRT	15^h 35^m 47.38^s, -28° 46′ 57.0″
position:	(233.9474, -28.7825 ± 2.1″)
UVOT	No position available.
Galactic N_HI:	9.29×10²⁰ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	15^h 35^m 47.38^s	= 233.9474 d
Best Dec:	-28° 46′ 57.0″	= -28.7825 d

Gal Lat:	21.61
Gal Long:	341.22

Sun angle:	106.37°, -6.6 hr East of Sun

¹Sper #4 auto processing.

Galaxies within 3.33 of XRT position

	RA*	Dec*		Catalogue
17.7	233.9429	-28.7854	B=22.3	SSS
27.2	233.9412	-28.7772	B1=20.3, R2=19.3	USNO-B1
29.2	233.9441	-28.7749	B2=22.0, R1=19.1	USNO-B1
31.7	233.9461	-28.7912	B=21.9, i=18.2	SSS
37.2	233.9384	-28.7891	B=22.2	SSS
41.9	233.9376	-28.7904	B=21.3	SSS
44.1	233.9379	-28.7735	B=21.6	SSS
45.2	233.9617	-28.7817	B=22.0	SSS
53.1	233.9590	-28.7718	B=21.3	SSS
53.2	233.9598	-28.7725	B=19.9, R2=17.8, i=17.3	SSS
59.3	233.9343	-28.7943	B2=21.0, I=18.6, R2=19.2	USNO-B1
62.0	233.9393	-28.7668	B2=20.9, I=17.7, R1=18.6, R2=18.7	USNO-B1
64.2	233.9398	-28.7990	B1=20.6, B2=21.2	USNO-B1
64.7	233.9669	-28.7881	B1=20.2, B2=19.9, I=18.6, R2=18.8	USNO-B1
65.3	233.9680	-28.7804	B=20.1, R2=18.6, i=18.9	SSS
66.6	233.9264	-28.7840	I=17.5, R1=19.4	USNO-B1
68.2	233.9638	-28.7948	B2=20.9, I=18.6, R2=18.9	USNO-B1
73.3	233.9705	-28.7800	B2=20.4, I=18.6, R1=18.7	USNO-B1
73.8	233.9418	-28.7626	B1=20.1, B2=21.0, R1=19.2, R2=18.9	USNO-B1
73.9	233.9248	-28.7773	B=21.7	SSS
74.6	233.9710	-28.7819	B=21.8	SSS
76.9	233.9373	-28.8019	B1=20.5, B2=21.7, I=18.5, R2=20.9	USNO-B1
78.0	233.9293	-28.7973	B2=17.7, I=17.9	USNO-B1
78.5	233.9236	-28.7763	B=20.3, R2=18.3, i=16.8	SSS
80.2	233.9233	-28.7753	B2=21.5, R2=20.1	USNO-B1
80.2	233.9427	-28.7606	B=21.8	SSS
83.9	233.9263	-28.7683	B2=21.1, R2=20.0	USNO-B1
84.1	233.9261	-28.7684	B=21.1	SSS
85.5	233.9538	-28.8056	B1=19.9, R1=19.5, R2=19.2	USNO-B1
86.0	233.9391	-28.7597	B2=22.0, I=18.3, R2=20.4	USNO-B1
88.1	233.9622	-28.8033	B=22.1, R2=20.1, i=18.8	SSS
88.5	233.9265	-28.7989	B2=21.1, R2=19.3	USNO-B1
90.0	233.9295	-28.8020	B2=21.2, R2=20.9	USNO-B1
90.6	233.9295	-28.8022	B2=21.5, R2=19.3	USNO-B1
90.9	233.9387	-28.7584	B=19.4, R2=17.7, i=17.6	SSS
91.4	233.9452	-28.7572	B2=21.1, I=18.1, R1=18.9, R2=19.1	USNO-B1
92.3	233.9744	-28.7726	B=20.4, R2=19.3	SSS
93.1	233.9200	-28.7920	B1=20.2, B2=19.7, I=17.5, R1=17.7, R2=18.0	USNO-B1
93.6	233.9214	-28.7701	B=21.2	SSS
93.8	233.9356	-28.8064	B=21.8	SSS
95.7	233.9357	-28.8070	B2=21.9, R1=18.9, R2=19.3	USNO-B1
96.6	233.9377	-28.7571	B=19.2, R2=17.7, i=17.2	SSS
101.0	233.9737	-28.7665	B1=20.5, R2=19.3	USNO-B1
102.8	233.9179	-28.7705	B1=20.4, R2=20.7	USNO-B1
103.7	233.9172	-28.7712	B=19.8, R2=18.6, i=18.0	SSS
104.2	233.9478	-28.8114	B2=21.6, R1=19.0, R2=20.6	USNO-B1
106.9	233.9204	-28.8005	B=22.1, R2=20.4, i=18.5	SSS
107.1	233.9805	-28.7760	B2=21.8, R2=19.3	USNO-B1
109.4	233.9196	-28.8007	B2=21.9, I=18.4, R1=19.3, R2=19.3	USNO-B1
111.3	233.9620	-28.7544	B=20.5, R2=20.1	SSS
111.9	233.9751	-28.7631	B1=20.2, B2=21.8, R2=20.8	USNO-B1
112.0	233.9814	-28.7734	B=22.0	SSS
112.3	233.9660	-28.8091	B=22.2, R2=20.3	SSS
113.6	233.9644	-28.8103	B1=20.3, I=18.6, R2=20.2	USNO-B1
113.8	233.9118	-28.7878	B=21.5	SSS
114.7	233.9238	-28.8068	B2=21.7, R2=19.3	USNO-B1
114.8	233.9451	-28.7507	I=18.1, R2=18.1	USNO-B1
116.5	233.9414	-28.7506	B=20.5	SSS
117.2	233.9230	-28.8071	B=22.5, R2=20.4, i=18.8	SSS
117.4	233.9277	-28.7549	B1=20.2, R2=18.5	USNO-B1
118.8	233.9685	-28.8098	B=22.3	SSS
121.0	233.9194	-28.7595	B=21.7, R2=19.8	SSS
123.7	233.9123	-28.7977	B=20.9, R2=19.2	SSS
127.5	233.9458	-28.8179	B2=22.0, I=16.7	USNO-B1
127.7	233.9094	-28.7703	B=22.4	SSS
128.3	233.9084	-28.7723	B=22.5	SSS
132.2	233.9557	-28.7465	B=19.5, R2=17.1, i=16.7	SSS
132.3	233.9377	-28.8182	I=18.5, R1=17.9	USNO-B1
132.6	233.9223	-28.8121	B2=21.1, I=18.6, R1=18.9, R2=19.3	USNO-B1
132.9	233.9486	-28.8194	B=21.7, R2=20.2	SSS
134.2	233.9560	-28.7460	B=19.2, R2=17.1, i=16.7	SSS
134.4	233.9518	-28.8196	B1=20.0, R2=18.0	USNO-B1
135.7	233.9044	-28.7835	B=22.2	SSS
136.6	233.9886	-28.7943	B2=21.4, R2=19.3	USNO-B1
136.8	233.9502	-28.8204	B2=20.6, I=18.9, R1=19.5, R2=19.0	USNO-B1
136.9	233.9065	-28.7952	B2=22.0, R2=20.8	USNO-B1
136.9	233.9044	-28.7874	B=19.7, R2=18.5, i=17.9	SSS
137.4	233.9047	-28.7748	B2=21.9, I=18.8, R2=20.8	USNO-B1
138.2	233.9705	-28.7499	B=20.9, R2=20.0	SSS
138.7	233.9370	-28.7451	B1=20.8, B2=21.1, R1=19.1, R2=19.3	USNO-B1
138.7	233.9709	-28.7500	B2=21.8, R2=19.2	USNO-B1
138.8	233.9263	-28.8163	I=18.6, R1=19.2	USNO-B1
139.8	233.9902	-28.7725	B=22.4	SSS
141.3	233.9290	-28.8183	B2=21.0, I=17.2, R1=18.0, R2=18.5	USNO-B1
144.3	233.9265	-28.7469	B=22.0, R2=19.9	SSS
144.5	233.9832	-28.8075	B=22.5	SSS
145.4	233.9313	-28.7447	B2=21.8, I=18.6	USNO-B1
146.3	233.9732	-28.7487	B=20.9, R2=19.1, i=18.9	SSS
146.6	233.9321	-28.7440	I=18.9, R1=18.8, R2=19.3	USNO-B1
146.8	233.9739	-28.7490	B2=21.5, I=18.6, R2=19.2	USNO-B1
146.8	233.9140	-28.8109	B1=20.4, I=18.9, R2=19.3	USNO-B1
147.6	233.9008	-28.7855	I=17.5, R1=19.3	USNO-B1
148.2	233.9454	-28.7414	B2=21.5, I=18.7	USNO-B1
149.3	233.9522	-28.7412	B2=22.0, I=18.9	USNO-B1
149.9	233.9348	-28.7424	B=22.2	SSS
153.2	233.9868	-28.8074	R1=19.2, R2=19.3	USNO-B1
153.7	233.9871	-28.8072	B2=21.1, R1=19.1, R2=20.8	USNO-B1
153.8	233.8992	-28.7890	B1=19.9, B2=20.0, I=17.5, R1=18.1, R2=18.1	USNO-B1
155.0	233.9743	-28.7465	B2=21.5, I=18.7	USNO-B1
155.6	233.9109	-28.7535	B2=21.1, R2=19.3	USNO-B1
155.8	233.9106	-28.7537	B=21.0	SSS
161.8	233.9222	-28.8216	B2=21.1, I=18.0, R2=18.9	USNO-B1
162.2	233.9219	-28.8216	B=20.4, R2=18.9, i=18.3	SSS
162.5	233.9225	-28.8220	B2=22.0, I=18.4	USNO-B1
164.1	233.9826	-28.8160	B1=20.1, B2=20.2, R2=19.2	USNO-B1
164.2	233.9108	-28.8149	B2=21.4, R2=19.3	USNO-B1
164.6	233.8967	-28.7717	B=22.2	SSS
167.5	233.9064	-28.7529	B=22.1	SSS
169.4	233.9259	-28.7394	B=19.6, R2=17.7, i=17.0	SSS
169.7	233.9270	-28.7389	B=20.3, R2=19.3	SSS
170.4	233.9165	-28.7437	B2=20.7, R2=19.3	USNO-B1
170.7	233.9164	-28.7437	B=21.0, R2=20.4	SSS
171.7	233.9035	-28.8107	I=18.3, R2=20.9	USNO-B1
171.7	234.0013	-28.7888	B=20.8, R2=19.4, i=18.3	SSS
172.3	233.9572	-28.7354	B1=20.2, B2=20.9, R2=20.4	USNO-B1
172.9	234.0017	-28.7891	B2=21.2, R2=19.3	USNO-B1
173.1	233.9326	-28.8288	B2=21.1, I=18.6	USNO-B1
174.0	233.9489	-28.8308	B=19.7, R2=19.4	SSS
174.0	233.9489	-28.8308	I=18.1, R1=18.3, R2=17.5	USNO-B1
174.6	233.9492	-28.8310	B1=19.2, B2=19.7, I=18.3, R2=17.7	USNO-B1
174.7	233.9719	-28.7390	B=21.8, R2=19.9	SSS
175.2	234.0028	-28.7860	B=21.9	SSS
176.5	233.8991	-28.7578	B2=21.3, I=18.2	USNO-B1
176.7	233.9863	-28.7472	B=22.2	SSS
176.9	233.9005	-28.8094	B2=21.6, R1=19.1	USNO-B1
177.0	233.9086	-28.7470	B2=22.0, R2=19.3	USNO-B1
178.5	233.8987	-28.7573	I=17.8, R1=17.7, R2=18.8	USNO-B1
179.2	233.8983	-28.7575	B2=21.3, I=17.6, R1=18.4, R2=18.6	USNO-B1
179.4	233.8982	-28.7575	B=20.9, R2=19.4	SSS
179.8	233.8905	-28.7858	B2=20.5, R2=18.9	USNO-B1
180.0	233.9206	-28.7384	B2=19.5, I=18.5, R2=20.2	USNO-B1
182.4	234.0016	-28.8002	B2=21.4, I=18.7	USNO-B1
182.8	233.8946	-28.8034	B=20.8	SSS
183.2	233.9432	-28.7317	B=22.3	SSS
183.7	234.0051	-28.7758	B2=21.3, R2=20.5	USNO-B1
185.4	233.8924	-28.7644	I=18.6, R2=20.9	USNO-B1
187.4	234.0022	-28.7625	B2=20.9, R2=19.1	USNO-B1
187.9	233.9802	-28.8261	B=22.0	SSS
189.0	233.9890	-28.7447	B=21.5	SSS
190.0	233.9775	-28.7368	B2=20.9, R1=19.2, R2=20.5	USNO-B1
190.2	233.9758	-28.7358		NED
190.4	233.8886	-28.7704	B2=20.9, R2=19.5	USNO-B1
191.1	234.0059	-28.7962	B2=20.3, I=18.7, R1=18.8, R2=19.0	USNO-B1
191.7	233.9777	-28.7364	B2=21.5, I=18.7, R1=19.1, R2=19.2	USNO-B1
193.9	234.0081	-28.7911	I=17.1, R1=17.6	USNO-B1
194.1	233.9780	-28.7357	B=20.8, R2=19.4	SSS
194.1	233.8893	-28.8003	B=22.2	SSS
195.5	233.8872	-28.7697	B=18.9, R2=17.1, i=16.7	SSS
195.6	233.9993	-28.7528	B2=20.8, I=18.3, R1=18.8, R2=19.0	USNO-B1
196.1	234.0088	-28.7912	B1=19.4, B2=19.4, I=17.8, R1=18.6, R2=17.9	USNO-B1
196.5	233.8858	-28.7743	I=18.3, R1=19.4, R2=20.6	USNO-B1
196.5	233.8861	-28.7924	B=21.3	SSS
197.2	234.0091	-28.7913	B=19.6, R2=18.8, i=18.1	SSS

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