Fermi GBM Science

Marshall Space Flight Center / Louisiana State University /
University of Alabama, Huntsville / USRA

GBM Occultation Flux Histories

The Fermi Gamma-Ray Burst Monitor (GBM) is not a pointed or imaging instrument. To determine fluxes for known sources, we measure the change in the count rate observed in the NaI (or BGO) detectors when the source enters or exits Earth occultation. The measured counts in each energy channel are converted to fluxes using an assumed spectrum for each source. For these measurements we currently use CTIME data, with 0.256-s resolution and 8 energy channels covering 8 keV to 1 MeV. Our technique uses all 8 energy channels, but for most sources the majority of the signal is in the 12-25 keV and 25-50 keV bands.

Description of plots:

Four energy bands are plotted for each source. Daily, two-day, or four-day averages are plotted, depending upon the source intensity. Red diamonds denote > 5-sigma statistical significance (possible detections), blue diamonds denote < -3-sigma statistical significance (usually an indication of interference or background problems). Each plot shows the long-term average as a dashed line, which is shown in pink if the long-term average statistical significance is > 10 sigma. Long-term averages include all plotted data, usually for the full Fermi mission to date, except for recently added sources.

Caveats:

1. These light curves are quick-look data only for observation planning purposes. Please contact the occultation project PI colleen.wilson@nasa.gov for more detailed analysis.
2. The position of the Sun is calculated at the time of each occultation, so it is not listed in the main table.
3. Sources in the galactic center region suffer from source confusion. Please treat galactic center sources with caution and correlate with other instruments before relying on these light curves.
4. Because the position of the Earth's limb on the sky repeats at the precession period of the Fermi orbit, apparent periods in the range of 50-55 days (or multiples thereof) may be present in the data and are likely to be spurious.
5. Significant negative (blue points) and positive (red points) close in time are often indicative of source interference problems. For example, the very bright outburst of A0535+262 in December 2009 caused such problems in several sources.

We ask that when results from these analyses are used, they be referenced as "Fermi GBM Earth occultation results provided by the Fermi GBM Earth occultation Guest Investigation teams at NASA/MSFC and LSU."

GBM-related publications from the Gamma-Ray Astronomy Occultation team are listed here.

#	Source name	RA (deg)	Dec (deg)	l (deg)	b (deg)	Object Type
1	SUN	0.000	0.000	96.337	-60.189	Star
2	IGR_J00234+6141	5.740	61.685	119.561	-1.000	CV
3	V709_CAS	7.204	59.289	120.042	-3.456	CV/DQ Her
4	BD+6270	9.300	61.380	121.227	-1.445	Star
5	FERMIJ0109+6134	17.445	61.558	125.115	-1.236	AGN
6	SMCX-1	19.275	-73.433	300.412	-43.569	HMXB/NS
7	3A0114+650	19.511	65.292	125.710	2.564	HMXB/NS
8	4U0115+634	19.630	63.740	125.922	1.026	HMXB/NS
9	PKS_0116-219	19.740	-21.690	173.445	-81.707	AGN
10	PKS_0142-278	26.260	-27.560	218.089	-78.095	AGN
11	PKS_0215+015	34.450	1.750	162.132	-54.413	AGN
12	S4_0218+35	35.270	35.940	142.598	-23.485	AGN
13	PKS_0235-618	39.220	-61.600	283.193	-51.296	AGN
14	LSI+61_303	40.132	61.229	135.675	1.086	Gamma-ray binary
15	PKS_0244-470	41.500	-46.860	261.837	-60.092	AGN
16	ALGOL	47.040	40.960	148.973	-14.897	Star
17	NGC1275	49.950	41.510	150.576	-13.263	AGN/Sy 2
18	GKPER	52.799	43.905	150.955	-10.104	CV/DQ Her
19	PKS_0332-403	53.560	-40.140	244.763	-54.073	AGN/BL Lac
20	V0332+53	53.750	53.173	146.052	-2.194	HMXB/NS
21	PKS_0347-211	57.490	-21.050	214.402	-49.015	AGN
22	XPER	58.850	31.050	163.081	-17.131	HMXB/NS
23	PKS_0402-362	60.970	-36.080	237.737	-48.486	AGN
24	PKS_0420-01	65.820	-1.340	195.290	-33.135	AGN
25	LSV+44_17	70.250	44.530	159.849	-1.269	HMXB
26	PKS_0440-00	70.660	-0.300	197.203	-28.465	AGN
27	3C129	72.290	45.010	160.429	0.142	AGN
28	LMCX-2	80.120	-71.960	283.094	-32.691	LMXB
29	PKS_0528+134	82.740	13.530	191.372	-11.009	AGN/FSRQ
30	LMCX-4	83.200	-66.367	276.331	-32.532	HMXB/NS
31	CRAB	83.633	22.015	184.557	-5.784	Pulsar/PWN
32	A0535+262	84.728	26.316	181.445	-2.643	HMXB/NS
33	LMCX-3	84.786	-64.083	273.573	-32.060	XRB/BH
34	NGC2110	88.041	-7.458	212.925	-16.552	AGN/Sy 2
35	MAXIJ0556-332	89.190	-33.170	238.934	-25.184	Transient
36	PKS_0601-70	90.300	-70.600	281.032	-29.629	AGN
37	4U0614+09	94.280	9.137	200.877	-3.364	LMXB/NS
38	TXS_0628-240	97.750	-24.110	232.686	-14.988	AGN
39	HESSJ0632+057	98.250	5.800	205.668	-1.437	Gamma-ray binary
40	MXB0656-072	104.612	-7.263	220.194	-1.756	HMXB/NS
41	MG2_J071354+193	108.480	19.580	197.651	13.588	AGN
42	4C_+14.23	111.320	14.420	203.644	13.908	AGN
43	PKS_0805-07	122.060	-7.850	229.037	13.160	AGN
44	VELA-X	128.287	-45.190	263.332	-3.106	PWN
45	VELA_PSR	128.850	-45.183	263.563	-2.783	Pulsar
46	GS0834-430	128.979	-43.185	262.019	-1.511	HMXB/NS
47	BZQ_J0850-1213	132.540	-12.230	238.663	19.517	AGN
48	VELAX-1	135.529	-40.555	263.059	3.930	HMXB/NS
49	S4_0917+44	140.240	44.700	175.698	44.813	AGN
50	MCG-05-23-016	146.920	-30.950	262.747	17.234	AGN/Sy 2
51	4C_+55.17	149.410	55.380	158.602	47.930	AGN
52	GROJ1008-57	152.442	-58.293	282.998	-1.823	HMXB/NS
53	MG2_J101241+243	153.170	24.660	207.768	54.356	AGN
54	TXS_1013+054	154.010	5.220	236.513	47.032	AGN
55	2FGLJ1019.0-5856	154.750	-58.942	284.323	-1.700	Gamma-ray binary
56	FIRSTJ102347.6+003841	155.950	0.640	243.496	45.780	Gamma-ray binary
57	MRK421	166.114	38.209	179.831	65.032	AGN/BL Lac
58	A1118-61	170.238	-61.917	292.499	-0.892	HMXB/NS
59	CENX-3	170.314	-60.623	292.091	0.336	HMXB/NS
60	PKS_1124-186	171.770	-18.960	276.730	39.581	AGN
61	NGC3783	174.750	-37.733	287.448	22.951	AGN/Sy 1
62	1E1145.1-6141	176.869	-61.954	295.490	-0.010	HMXB/NS
63	TON_599	179.880	29.250	199.393	78.371	AGN
64	NGC4151	182.650	39.417	155.017	75.061	AGN/Sy 1.5
65	NGC4388	186.450	12.660	279.141	74.335	AGN/Sy
66	GX301-2	186.657	-62.770	300.098	-0.035	HMXB/NS
67	1FGLJ1227.9-4852	186.980	-48.880	298.954	13.810	Gamma-ray binary
68	3C273	187.275	2.050	289.945	64.357	AGN/Blazar
69	PKS_1244-255	191.700	-25.800	301.624	37.060	AGN
70	3C_279	194.050	-5.790	305.111	57.062	AGN/Blazar
71	4U1254-690	194.405	-69.289	303.482	-6.424	LMXB/NS
72	COMA_CLUSTER	194.950	27.980	58.095	87.960	Galaxy cluster
73	GX304-1	195.321	-61.602	304.103	1.247	HMXB/NS
74	PSRB1259-63	195.700	-63.833	304.184	-0.989	Gamma-ray binary
75	MAXIJ1305-704	196.731	-70.451	304.238	-7.619	Transient
76	GB_1310+487	198.180	48.480	113.383	68.252	AGN
77	CEN_A	201.365	-43.019	309.516	19.417	AGN/Sy 2
78	4U1323-62	201.650	-62.140	307.027	0.452	LMXB/NS
79	PKS_1329-049	203.020	-5.160	321.367	56.250	AGN
80	NGC5252	204.571	4.543	331.309	64.802	AGN/Sy 1.9
81	IC4329A	207.330	-30.309	317.496	30.921	AGN/Sy 1.2
82	MAXIJ1409-619	212.011	-61.984	311.797	-0.438	XRB/NS
83	CIRCINUS_GALAXY	213.291	-65.339	311.326	-3.808	AGN/Sy 2
84	NGC5506	213.312	-3.207	339.151	53.811	AGN/Sy 1.9
85	H1417-624	215.300	-62.700	313.019	-1.599	HMXB/NS
86	CENX-4	224.592	-31.669	332.243	23.881	LMXB/NS
87	PKS_1502+106	226.100	10.490	11.372	54.582	AGN
88	PKS_1510-08	228.210	-9.100	351.289	40.139	AGN
89	MSH15-52	228.507	-59.256	320.270	-1.271	Pulsar
90	H_1517+656	229.450	65.420	102.257	45.390	AGN/BL Lac
91	CIRX-1	230.170	-57.167	322.118	0.038	LMXB/NS
92	B2_1520+31	230.540	31.740	50.169	57.024	AGN
93	SWIFTJ1539.2-6227	234.818	-62.459	321.030	-5.641	XRB/BH
94	4U1538-52	235.597	-52.386	327.420	2.164	HMXB/NS
95	4U1543-624	236.980	-62.570	321.757	-6.338	LMXB/NS
96	SGR1550-5418	237.725	-54.307	327.237	-0.132	SGR
97	PKS_1551+130	238.390	12.950	23.795	45.218	AGN
98	T Coronae Borealis	239.876	26.920	42.274	48.165	REC/NOVA
99	H1608-522	243.175	-52.417	330.929	-0.844	LMXB/NS
100	SCOX-1	244.980	-15.640	359.095	23.784	LMXB/NS
101	USCO	245.628	-17.878	357.669	21.869	CV/Nova
102	PKS_1622-253	246.450	-25.460	352.144	16.316	AGN
103	X1624-490	247.011	-49.198	334.915	-0.262	LMXB/NS
104	IGRJ16318-4848	247.967	-48.803	335.633	-0.446	HMXB/NS
105	AXJ1631.9-4752	248.008	-47.874	336.330	0.169	XRB/NS
106	4U1626-67	248.070	-67.462	321.788	-13.092	LMXB/NS
107	4U1630-472	248.502	-47.394	336.908	0.252	LMXB/BH
108	4C_+38.41	248.810	38.130	61.079	42.340	AGN
109	4U1636-536	250.231	-53.751	332.915	-4.818	LMXB/NS
110	IGRJ16418-4532	250.450	-45.533	339.189	0.500	HMXB/NS
111	SWIFTJ164449.3P573451	251.200	57.600	86.734	39.442	Transient
112	GX340+0	251.449	-45.611	339.588	-0.079	LMXB/NS
113	IGRJ16479-4514	251.975	-45.233	340.115	-0.116	HMXB/NS
114	GROJ1655-40	253.500	-39.850	344.978	2.454	LMXB/BH
115	HERX-1	254.457	35.342	58.148	37.523	LMXB/NS
116	MAXIJ1659-152	254.760	-15.258	5.517	16.524	XRB/BH
117	TXS_1700+685	255.040	68.500	99.560	35.203	AGN/Sy 1
118	OAO1657-415	255.199	-41.673	344.354	0.312	HMXB/NS
119	XTEJ1701-462	255.240	-46.190	340.808	-2.489	LMXB
120	GX339-4	255.706	-48.789	338.940	-4.326	LMXB/BH
121	4U1700-377	255.986	-37.844	347.754	2.174	HMXB/NS
122	GX349+2	256.450	-36.417	349.116	2.743	LMXB/NS
123	4U1702-429	256.564	-43.036	343.887	-1.319	LMXB/NS
124	H1705-440	257.228	-44.101	343.322	-2.342	LMXB/NS
125	IGRJ17091-3624	257.275	-36.402	349.526	2.220	LMXB/BH
126	4U1708-407	258.100	-40.840	346.332	-0.928	LMXB
127	OPH_CLUSTER	258.110	-23.380	0.562	9.268	Galaxy cluster
128	SWIFTJ1713.4-4219	258.361	-42.327	345.242	-1.960	Transient
129	IGRJ17191-2821	259.813	-28.299	357.352	5.186	Transient
130	GRS1724-308	261.900	-30.800	356.327	2.291	LMXB
131	SWIFT J1727.8-1613	261.937	-16.212	8.639	10.246	HMXB
132	SWIFT J1728.9-3613	262.244	-36.244	351.956	-0.955	HMXB
133	GX9+9	262.934	-16.961	8.513	9.038	LMXB/NS
134	GX354-0	263.000	-33.833	354.309	-0.157	LMXB/NS
135	GX1+4	263.008	-24.747	1.935	4.795	LMXB/NS
136	H1730-333	263.350	-33.390	354.839	-0.159	LMXB/NS
137	KS1731-260	263.554	-26.086	1.074	3.655	LMXB/NS
138	B2_1732+38A	263.590	38.960	64.021	31.004	AGN
139	SLX1735-269	264.567	-27.004	0.786	2.398	LMXB/NS
140	X1735-444	264.743	-44.450	346.054	-6.994	LMXB/NS
141	4C_+51.37	265.150	52.200	79.569	31.751	AGN
142	1E1740-29	265.969	-29.742	359.114	-0.097	LMXB/BH
143	SWIFTJ174510.8-262411	266.29	-26.40	359.114	-0.097	Transient
144	MAXIJ1745-288	266.460	-28.820	0.124	0.019	Transient
145	1A1742-294	266.523	-29.515	359.559	-0.389	LMXB/?
146	IGRJ17464-3213	266.575	-32.240	357.254	-1.844	LMXB/BH
147	IGRJ17473-2721	266.825	-27.344	1.553	0.511	XRB
148	GX3+1	266.984	-26.564	2.294	0.793	LMXB/NS
149	NGC6440	267.220	-20.360	7.729	3.801	Globular cluster
150	EXO1745-248	267.233	-24.893	3.841	1.463	LMXB
151	4U1746-370	267.550	-37.050	353.532	-5.002	LMXB/NS
152	XTEJ1752-223	268.044	-22.325	6.429	2.138	XRB/BH
153	SWIFTJ1753.5-0127	268.368	-1.453	24.897	12.185	LMXB/BH
154	SWIFTJ1753.7-2544	268.429	-25.742	3.664	0.099	Transient
155	GX5-1	270.275	-25.083	5.070	-1.013	LMXB/NS
156	GRS1758-258	270.300	-25.733	4.516	-1.355	LMXB/BH
157	GX9+1	270.382	-20.531	9.074	1.155	LMXB/NS
158	SAXJ1806.5-2215	271.636	-22.238	8.160	-0.701	Transient
159	SAXJ1808.4-3658	272.115	-36.979	355.385	-8.148	LMXB
160	XTEJ1810-189	272.608	-19.07	11.372	0.041	LMXB
161	GX13+1	273.632	-17.156	13.518	0.107	LMXB/NS
162	4U1812-12	273.800	-12.083	18.056	2.383	LMXB/NS
163	GX17+2	274.006	-14.036	16.433	1.278	LMXB/NS
164	SAXJ1818.6-1703	274.663	-17.052	14.078	-0.711	HMXB
165	H1820-303	275.925	-30.367	2.785	-7.921	LMXB/NS
166	IGRJ18245-2452	276.111	-24.857	7.798	-5.553	Transient
167	HESSJ1825-137	276.130	-13.852	17.567	-0.453	Pulsar
168	4U1822-000	276.340	-0.010	29.940	5.795	LMXB/NS
169	3A1822-371	276.445	-37.105	356.850	-11.291	LMXB/NS
170	LS5039	276.560	-14.850	16.879	-1.288	Gamma-ray binary
171	GS1826-238	277.367	-23.797	9.272	-6.087	LMXB/NS
172	SGR1833-0832	278.435	-8.519	23.340	0.020	SGR
173	MAXIJ1836-194	278.959	-19.385	13.899	-5.408	Transient
174	SERX-1	279.990	5.036	36.118	4.842	LMXB/NS
175	SWIFTJ1842.5-1124	280.500	-11.400	21.711	-3.108	XRB/BH
176	SWIFTJ1843.5-0343	280.899	-3.730	28.719	0.041	Transient
177	GS1843+00	281.412	0.891	33.065	1.694	HMXB/NS
178	IGRJ18483-0311	282.075	-3.162	29.760	-0.744	HMXB/NS
179	S4_1849+67	282.320	67.090	97.486	25.042	AGN/Sy 1
180	S4_1851+48	283.120	48.930	78.594	19.945	AGN
181	IGRJ18539+0727	283.475	7.458	39.854	2.849	XRB/BH
182	XTEJ1855-026	283.880	-2.607	31.076	-2.096	HMXB/NS
183	XTEJ1858+034	284.650	3.350	36.729	-0.064	HMXB/NS
184	HT1900.1-2455	285.036	-24.920	11.305	-12.873	LMXB/NS
185	TXS_1902+556	285.800	55.680	85.969	20.540	AGN
186	4U1901+03	285.905	3.192	37.162	-1.250	HMXB/NS
187	H1907+097	287.400	9.833	43.743	0.484	HMXB/NS
188	SWIFTJ1910.2-0546	287.595	-5.799	29.902	-6.844	Transient
189	4U1909+07	287.699	7.598	41.896	-0.810	HMXB/NS
190	AQLX-1	287.817	0.585	35.719	-4.143	LMXB/NS
191	GRS1915+105	288.820	10.970	45.397	-0.227	LMXB/BH
192	TXS_1920-211	290.880	-21.080	17.173	-16.253	AGN
193	IGRJ19294+1816	292.480	18.640	53.828	0.275	HMXB/NS
194	XTEJ1946+274	296.414	27.365	63.207	1.395	HMXB/NS
195	4U1954+31	298.929	32.100	68.396	1.927	LMXB/NS
196	PKS_1954-388	299.500	-38.750	1.581	-28.958	AGN
197	CYGX-1	299.590	35.202	71.335	3.067	HMXB/BH
198	4U1957+115	299.850	11.710	51.309	-9.329	LMXB
199	EXO2030+375	308.064	37.639	77.153	-1.241	HMXB/NS
200	CYGX-3	308.107	40.958	79.845	0.700	HMXB/?
201	PKS_2052-47	314.070	-47.250	352.586	-40.382	AGN
202	V407CYG	315.541	45.776	86.983	-0.482	CV/Mira Cet
203	SAXJ2103.5+4545	315.899	45.757	87.134	-0.681	HMXB/NS
204	IGJR21247+5058	321.180	50.980	93.331	0.391	AGN
205	4U2127+119	322.490	12.170	65.013	-27.308	LMXB
206	GINGA2138+56	324.878	56.986	99.012	3.312	HMXB/NS
207	SS_CYG	325.678	43.586	90.559	-7.110	CV/Dwarf nova
208	OX_169	325.900	17.730	72.117	-26.086	AGN/Sy 1
209	CYGX-2	326.170	38.320	87.326	-11.317	LMXB/NS
210	PKS_2155-304	329.720	-30.230	17.724	-52.249	AGN/BL Lac
211	PKS_2201+171	330.860	17.430	75.670	-29.633	AGN
212	4U2206+54	331.984	54.518	100.603	-1.106	HMXB/NS
213	CTA_102	338.150	11.730	77.436	-38.582	AGN/Blazar
214	3C454.3	343.490	16.148	86.110	-38.184	AGN/Blazar
215	PKS_2255-282	344.520	-27.970	24.392	-64.916	AGN/Sy 1
216	B2_2308+34	347.770	34.420	100.414	-24.026	AGN
217	CAS_A	350.860	58.820	111.741	-2.127	SNR
218	CTS_0490	351.370	-35.970	1.760	-69.726	AGN
219	PKS_2325+093	351.890	9.670	91.143	-47.957	AGN/FSRQ
220	PKS_2326-502	352.340	-49.930	331.986	-62.313	AGN
221	PMN_J2345-1555	356.300	-15.920	65.666	-70.984	AGN
222	1ES_1959+650	299.999	65.149	98.003	17.670	AGN/BL Lac
223	1RXSJ180408.9-342058	271.038	-34.349	357.297	-6.128	LMXB
224	AX_J1744.8-2921	266.213	-29.355	359.555	-0.075	LMXB
225	DG_CVN	202.940	29.280	48.876	80.860	Star
226	GINGA1354-645	209.541	-64.735	309.978	-2.780	LMXB
227	GRO_J1719-24	259.138	-25.017	0.142	6.991	LMXB
228	GRO_J1744-28	266.138	-28.741	0.045	0.302	LMXB
229	GRO_J1750-27	267.300	-26.647	2.373	0.520	HMXB
230	GRS1739-278	265.670	-27.760	0.672	1.176	Star
231	GS1843-02	282.074	-2.420	30.420	-0.405	HMXB
232	H1145-619	117.000	-62.207	295.611	-0.240	Star
233	H1745-203	267.225	-20.367	7.729	3.798	LMXB
234	IGR_J00291+5934	7.263	59.572	120.096	-3.177	LMXB
235	IGRJ17252-3616	261.297	-36.283	351.497	-0.354	HMXB
236	IGRJ19140+0951	288.518	9.888	44.296	-0.469	HMXB
237	KS1947+300	297.390	30.213	66.099	2.084	HMXB
238	MAXIJ1828-249	277.244	-25.029	8.175	-6.389	Transient
239	NGC_1052	40.270	-8.256	182.020	-57.926	AGN, Sy2
240	NGC_3998	179.484	55.454	138.172	60.063	AGN, Sy
241	PKS_0336-01	54.879	-1.777	188.001	-42.455	AGN
242	RX_J0520.5-6932	80.129	-69.532	280.263	-33.192	Star
243	SAXJ1750.8-2900	267.602	-29.038	0.454	-0.949	LMXB
244	SMCX-3	13.024	-72.435	302.862	-44.694	HMXB
245	SN2014J	148.926	69.674	141.427	40.558	Supernova
246	UX_ARI	51.647	28.715	159.549	-22.913	Star
247	V404_CYG	306.016	33.868	73.119	-2.091	LMXB
248	XTE_J1908+094	287.221	9.385	43.263	0.434	HMXB
249	XTEJ1859+083	284.770	8.250	41.147	2.063	HMXB
250	SWIFT_J0243.6+6124	40.9186	61.4323	91.1937	37.3963	XRB
248	MAXIJ1348-630	207.054	-63.274			Transient