National Aeronautics and Space Administration

Goddard Space Flight Center

Data

• Data Policy
• Data Access

• Data Analysis
• Caveats
• Newsletters
• FAQ

LAT 4FGL-DR2 Catalog Aperture Photometry Lightcurves

We provide here aperture photometry light curves of all sources in the Fermi Large Area Telescope 10-year Source Catalog (4FGL-DR2) with 30 day time resolution. The light curves and plots will generally be updated weekly. We also plot power spectra of the light curves for periods between 65 days and the length of the light curve, with a frequency oversampling of a factor of 5.

Some caveats:

• These light curves are intended to provide a quick way to inspect gross features in the long-term light curves. They are unlikely to be directly useful for detailed scientific analysis.
• They are not background subtracted.
• The apertures will contain photons from nearby sources.

A thread describing the steps involved in aperture photometry of LAT data can be found here. A script to perform aperture photometry (aperture.pl) is available here.

The columns in the data files are:

1. Time of center of bin (MJD)
2. Count rate in the aperture in photons cm^-2 s^-1
3. Count rate error based on the observed number of photons. This is used in the plots
4. Half-width of the time bin in days.
5. Count rate error based on the relative exposure of the time bin.
6. Exposure in cm^2 s.

The aperture photometry used:

• 1 degree radius apertures
• 100 MeV to 200 GeV
• Data are P8 Source class (evclass=128), front+back (evtype=3)
• A zenith limit of 105 degrees.
• A rock limit of 90 degrees. (i.e. no filtering on this.)
• A bore-sight limit of 180 degrees. (i.e. no filtering on this.)
• Times when a source was closer than 5 degrees from the Sun are excluded.

For caveats on period detection in LAT light curves please see here.

Flaring Sources in the Aperture Photometry Lightcurves

RA Range:
00-01 | 02-03 | 04-05 | 06-07 | 08-09 | 10-11 | 12-13 | 14-15 | 16-17 | 18-19 | 20-21 | 22-23

4FGLJ2200.1+2138 Data	4FGLJ2200.3+1029 Data	4FGLJ2200.7-2414 Data
4FGLJ2201.0-5907 Data	4FGLJ2201.0-6928 Data	4FGLJ2201.5-8339 Data
4FGLJ2201.5+2950 Data	4FGLJ2201.8+5048 Data	4FGLJ2201.9-1706 Data
4FGLJ2202.7-5637 Data	4FGLJ2202.7+4216 Data	4FGLJ2203.3-5009 Data
4FGLJ2203.4+1725 Data	4FGLJ2203.6+6751 Data	4FGLJ2204.3+0438 Data
4FGLJ2204.5+3634 Data	4FGLJ2205.0+0943 Data	4FGLJ2205.0+7432 Data
4FGLJ2205.5+6016 Data	4FGLJ2205.8-8254c Data	4FGLJ2206.8-0032 Data
4FGLJ2207.0+3607 Data	4FGLJ2207.1+2222 Data	4FGLJ2207.1+4316 Data
4FGLJ2207.5-5346 Data	4FGLJ2207.6+0053 Data	4FGLJ2208.1-4507 Data
4FGLJ2208.1+4058 Data	4FGLJ2208.2+0350 Data	4FGLJ2208.4+6443e Data
4FGLJ2209.2+3710 Data	4FGLJ2209.4+4329 Data	4FGLJ2209.7-0451 Data
4FGLJ2209.8-5028 Data	4FGLJ2210.2+1624 Data	4FGLJ2210.2+5919 Data
4FGLJ2210.8+3203 Data	4FGLJ2211.0-0003 Data	4FGLJ2211.2-1325 Data
4FGLJ2211.4-7040 Data	4FGLJ2211.9-2924 Data	4FGLJ2212.0+2356 Data
4FGLJ2212.2-7251 Data	4FGLJ2212.4+0708 Data	4FGLJ2212.6+2800 Data
4FGLJ2212.8+0647 Data	4FGLJ2212.9-2526 Data	4FGLJ2213.5-4754 Data
4FGLJ2213.9+5948c Data	4FGLJ2214.6+3000 Data	4FGLJ2215.4+0544 Data
4FGLJ2215.4+6105 Data	4FGLJ2215.6+5135 Data	4FGLJ2216.8+3103 Data
4FGLJ2216.9+2421 Data	4FGLJ2217.5+6346 Data	4FGLJ2218.5+6822 Data
4FGLJ2218.6+1941 Data	4FGLJ2218.8+4736 Data	4FGLJ2219.2-0342 Data
4FGLJ2219.2+1806 Data	4FGLJ2219.4+3229 Data	4FGLJ2219.5+4653 Data
4FGLJ2219.7-6837 Data	4FGLJ2220.5+2813 Data	4FGLJ2220.8+6319 Data
4FGLJ2221.5-5225 Data	4FGLJ2221.9-3504 Data	4FGLJ2222.1-3907 Data
4FGLJ2222.8+1209 Data	4FGLJ2222.9+1507 Data	4FGLJ2223.0+2704 Data
4FGLJ2223.0+6746 Data	4FGLJ2223.3+0102 Data	4FGLJ2223.4+5814 Data
4FGLJ2224.0-1127 Data	4FGLJ2224.3+7737 Data	4FGLJ2224.5+0353 Data
4FGLJ2225.5-1114 Data	4FGLJ2225.6+2120 Data	4FGLJ2225.7-0457 Data
4FGLJ2225.8-0804 Data	4FGLJ2226.5+6901c Data	4FGLJ2226.6+0210 Data
4FGLJ2226.8+0051 Data	4FGLJ2227.1+6455 Data	4FGLJ2227.9-3031 Data
4FGLJ2227.9+0036 Data	4FGLJ2228.0-4155 Data	4FGLJ2228.5+2211 Data
4FGLJ2228.6-1636 Data	4FGLJ2229.0+6114 Data	4FGLJ2229.1+2254 Data
4FGLJ2229.2-6911 Data	4FGLJ2229.2+6421c Data	4FGLJ2229.7-0832 Data
4FGLJ2230.9-7815 Data	4FGLJ2231.0-4416 Data	4FGLJ2232.3+6246 Data
4FGLJ2232.6-2023 Data	4FGLJ2232.6+1143 Data	4FGLJ2232.8+1334 Data
4FGLJ2233.3+6530c Data	4FGLJ2233.9-1229 Data	4FGLJ2234.1-2656 Data
4FGLJ2234.2-4156 Data	4FGLJ2234.7+0943 Data	4FGLJ2234.8-2610 Data
4FGLJ2235.1-0623 Data	4FGLJ2235.3-4836 Data	4FGLJ2235.3+1818 Data
4FGLJ2235.8-3627 Data	4FGLJ2236.2-1706 Data	4FGLJ2236.3+2828 Data
4FGLJ2236.4-2309 Data	4FGLJ2236.5-1433 Data	4FGLJ2236.6+3706 Data
4FGLJ2236.9+1839 Data	4FGLJ2237.0-3921 Data	4FGLJ2237.2-6726 Data
4FGLJ2237.6-5126 Data	4FGLJ2238.5+5903 Data	4FGLJ2239.2-5657 Data
4FGLJ2239.4+5130 Data	4FGLJ2240.3-1246 Data	4FGLJ2240.3-5241 Data
4FGLJ2240.6+5833 Data	4FGLJ2240.7-4746 Data	4FGLJ2241.1-4122 Data
4FGLJ2241.2+4120 Data	4FGLJ2241.2+4303 Data	4FGLJ2241.3+2943 Data
4FGLJ2241.4-8327 Data	4FGLJ2241.7-5236 Data	4FGLJ2241.9+5729 Data
4FGLJ2243.4-2544 Data	4FGLJ2243.5-3931 Data	4FGLJ2243.7-1231 Data
4FGLJ2243.8-2510 Data	4FGLJ2243.9+2021 Data	4FGLJ2244.2+4057 Data
4FGLJ2244.6+2502 Data	4FGLJ2244.9-0007 Data	4FGLJ2245.5-1734 Data
4FGLJ2245.8-4148 Data	4FGLJ2245.9+1544 Data	4FGLJ2246.7-5207 Data
4FGLJ2247.4-0001 Data	4FGLJ2247.5-3700 Data	4FGLJ2247.7-5857 Data
4FGLJ2247.8+4413 Data	4FGLJ2248.7-3235 Data	4FGLJ2248.9+2106 Data
4FGLJ2249.4-1300 Data	4FGLJ2249.4+6222 Data	4FGLJ2249.7-5944 Data
4FGLJ2249.9+0452 Data	4FGLJ2250.0-1250 Data	4FGLJ2250.0+3825 Data
4FGLJ2250.4-4206 Data	4FGLJ2250.4+1748 Data	4FGLJ2250.5+3305 Data
4FGLJ2250.6+5809 Data	4FGLJ2250.7-2806 Data	4FGLJ2251.2+5550 Data
4FGLJ2251.5-4928 Data	4FGLJ2251.7-3208 Data	4FGLJ2252.0+4031 Data
4FGLJ2252.6+1245 Data	4FGLJ2253.2-1232 Data	4FGLJ2253.3+3233 Data
4FGLJ2253.7+1405 Data	4FGLJ2253.9+1609 Data	4FGLJ2254.2+4305 Data
4FGLJ2254.8-2725 Data	4FGLJ2254.9+5802 Data	4FGLJ2255.2+2411 Data
4FGLJ2255.4-3252 Data	4FGLJ2256.0-2740 Data	4FGLJ2256.4-7119 Data
4FGLJ2256.5+6212c Data	4FGLJ2256.6-2011 Data	4FGLJ2256.7+1307 Data
4FGLJ2256.8-1024 Data	4FGLJ2257.5+0748 Data	4FGLJ2258.1-2759 Data
4FGLJ2258.3-3643 Data	4FGLJ2258.4-5524 Data	4FGLJ2258.5-8247 Data
4FGLJ2258.6+5847c Data	4FGLJ2259.7-3549 Data	4FGLJ2259.8-1552 Data
4FGLJ2300.1+4053 Data	4FGLJ2300.3+3136 Data	4FGLJ2300.7-2645 Data
4FGLJ2300.8-0736 Data	4FGLJ2300.9+7108 Data	4FGLJ2301.0-0158 Data
4FGLJ2301.9+5855e Data	4FGLJ2302.7+4443 Data	4FGLJ2302.8-1841 Data
4FGLJ2303.9+5554 Data	4FGLJ2304.0+5406e Data	4FGLJ2304.3+0618 Data
4FGLJ2304.6+3704 Data	4FGLJ2306.6-1105 Data	4FGLJ2306.6+0940 Data
4FGLJ2307.4-1206 Data	4FGLJ2307.6+1451 Data	4FGLJ2308.9+1111 Data
4FGLJ2309.7-3632 Data	4FGLJ2310.0-0555 Data	4FGLJ2311.0+0205 Data
4FGLJ2311.0+3425 Data	4FGLJ2311.6-4427 Data	4FGLJ2311.7+2604 Data
4FGLJ2311.8+4541 Data	4FGLJ2312.4+8253 Data	4FGLJ2312.5+7241 Data
4FGLJ2313.4-6922 Data	4FGLJ2313.4+5947 Data	4FGLJ2313.5+3945 Data
4FGLJ2313.9-4501 Data	4FGLJ2314.0+1445 Data	4FGLJ2315.6-5018 Data
4FGLJ2315.9+5955c Data	4FGLJ2316.7-3144 Data	4FGLJ2316.8-2518 Data
4FGLJ2316.9-5210 Data	4FGLJ2317.0+3756 Data	4FGLJ2317.3+1433 Data
4FGLJ2317.4-4533 Data	4FGLJ2317.7+2839 Data	4FGLJ2317.8+6140c Data
4FGLJ2318.2+1915 Data	4FGLJ2318.6-3827 Data	4FGLJ2318.9+4151 Data
4FGLJ2319.1-4207 Data	4FGLJ2319.6-0456 Data	4FGLJ2319.7+1609 Data
4FGLJ2320.1-2440 Data	4FGLJ2320.2+0707 Data	4FGLJ2320.8-0823 Data
4FGLJ2321.0-6308 Data	4FGLJ2321.4+5111 Data	4FGLJ2321.5-1619 Data
4FGLJ2321.7-6438 Data	4FGLJ2321.9-4842 Data	4FGLJ2321.9+2734 Data
4FGLJ2321.9+3204 Data	4FGLJ2322.1+4440 Data	4FGLJ2322.6-0735 Data
4FGLJ2322.7+3436 Data	4FGLJ2322.8-4916 Data	4FGLJ2323.1+2040 Data
4FGLJ2323.4+5849 Data	4FGLJ2323.5-0317 Data	4FGLJ2323.6-0617 Data
4FGLJ2323.8+4210 Data	4FGLJ2323.9+2519 Data	4FGLJ2323.9+6219 Data
4FGLJ2324.6+3115 Data	4FGLJ2324.7-4041 Data	4FGLJ2324.7+0801 Data
4FGLJ2325.2-2010 Data	4FGLJ2325.2+3957 Data	4FGLJ2325.4-3559 Data
4FGLJ2325.4-4800 Data	4FGLJ2325.6+1644 Data	4FGLJ2325.7+1821 Data
4FGLJ2325.9+6206c Data	4FGLJ2326.2+0113 Data	4FGLJ2326.5+6122 Data
4FGLJ2326.5+8555c Data	4FGLJ2326.9-0201 Data	4FGLJ2326.9-4130 Data
4FGLJ2327.3+4717 Data	4FGLJ2327.4+0444 Data	4FGLJ2327.5-3259 Data
4FGLJ2327.5+0939 Data	4FGLJ2328.0-2557 Data	4FGLJ2328.2-4422 Data
4FGLJ2328.3-4036 Data	4FGLJ2329.0+0832 Data	4FGLJ2329.2+3755 Data
4FGLJ2329.3-4733 Data	4FGLJ2329.3-4955 Data	4FGLJ2329.7-2118 Data
4FGLJ2329.7+6101 Data	4FGLJ2330.2+7759 Data	4FGLJ2330.3-2332 Data
4FGLJ2330.3-2948 Data	4FGLJ2330.5-2445 Data	4FGLJ2330.5+1102 Data
4FGLJ2330.6-3726 Data	4FGLJ2331.0-2147 Data	4FGLJ2331.1-1653 Data
4FGLJ2331.3-1558 Data	4FGLJ2331.5-0258 Data	4FGLJ2331.6+4430 Data
4FGLJ2332.1-4118 Data	4FGLJ2333.1-5527 Data	4FGLJ2333.4-0133 Data
4FGLJ2334.2+0736 Data	4FGLJ2334.8+1432 Data	4FGLJ2334.9-2346 Data
4FGLJ2335.4-0128 Data	4FGLJ2336.2-0715 Data	4FGLJ2336.5-7622 Data
4FGLJ2336.6-4115 Data	4FGLJ2336.6+2356 Data	4FGLJ2336.9-5859 Data
4FGLJ2336.9-8427 Data	4FGLJ2337.7-2903 Data	4FGLJ2338.0-0230 Data
4FGLJ2338.1+0325 Data	4FGLJ2338.1+0411 Data	4FGLJ2338.9+2124 Data
4FGLJ2339.2-7403 Data	4FGLJ2339.3-2656 Data	4FGLJ2339.4+3008 Data
4FGLJ2339.6-0533 Data	4FGLJ2339.6+0242 Data	4FGLJ2340.5+3854 Data
4FGLJ2340.8+8015 Data	4FGLJ2341.8-2917 Data	4FGLJ2342.4-4739 Data
4FGLJ2343.0-4756 Data	4FGLJ2343.6+3438 Data	4FGLJ2343.7-5624 Data
4FGLJ2343.9+0546 Data	4FGLJ2345.2-1555 Data	4FGLJ2346.2-4322 Data
4FGLJ2346.7+0705 Data	4FGLJ2346.7+8008 Data	4FGLJ2347.0-5720 Data
4FGLJ2347.0+5141 Data	4FGLJ2347.9-5106 Data	4FGLJ2347.9+5436 Data
4FGLJ2348.0-1630 Data	4FGLJ2348.1-4934 Data	4FGLJ2348.3-6049 Data
4FGLJ2349.2+4535 Data	4FGLJ2349.4+0534 Data	4FGLJ2350.5-3930 Data
4FGLJ2350.6-3005 Data	4FGLJ2350.9-1416 Data	4FGLJ2351.3-7559 Data
4FGLJ2351.4-2818 Data	4FGLJ2352.0+1750 Data	4FGLJ2352.9+3031 Data
4FGLJ2353.1-4806 Data	4FGLJ2353.2+3135 Data	4FGLJ2353.5-1457 Data
4FGLJ2353.5+6646 Data	4FGLJ2353.7-3037 Data	4FGLJ2353.8-3911 Data
4FGLJ2354.1-0958 Data	4FGLJ2354.1+2720 Data	4FGLJ2354.6+4554 Data
4FGLJ2354.9+8151 Data	4FGLJ2355.2-5247 Data	4FGLJ2355.5-6614 Data
4FGLJ2355.7-3351 Data	4FGLJ2356.2+4036 Data	4FGLJ2357.0-4840 Data
4FGLJ2357.4-0152 Data	4FGLJ2357.4-1718 Data	4FGLJ2357.8-5311 Data
4FGLJ2357.8+6231 Data	4FGLJ2357.8+6839 Data	4FGLJ2358.0-4601 Data
4FGLJ2358.1-2853 Data	4FGLJ2358.3-1021 Data	4FGLJ2358.3+3830 Data
4FGLJ2358.5-1808 Data	4FGLJ2359.0-3038 Data	4FGLJ2359.0+3922 Data
4FGLJ2359.1+1719 Data	4FGLJ2359.2-3134 Data	4FGLJ2359.3-2049 Data
4FGLJ2359.3+0215 Data	4FGLJ2359.3+1444 Data	4FGLJ2359.9-3736 Data

00-01 | 02-03 | 04-05 | 06-07 | 08-09 | 10-11 | 12-13 | 14-15 | 16-17 | 18-19 | 20-21 | 22-23

• Curator: J.D. Myers
• NASA Official: Phil Newman
• Science Official: Elizabeth Hays

• › Privacy Policy and Important Notices
• › Contact NASA
• › Fermi FAQ, Comments, Feedback
• › Page Last Updated: Wed, Aug 12, 2020