National Aeronautics and Space Administration

Goddard Space Flight Center

Data

• Data Policy
• Data Access

• Data Analysis
• Caveats
• Newsletters
• FAQ

LAT 2-year Source Catalog Aperture Photometry Lightcurves

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.
7. Line number. This will not be present in later versions of these files.

The aperture photometry used:

• 1 degree radius apertures
• 100 MeV to 200 GeV
• IRFs are P7SOURCE_V6 (i.e. event_class = 2)
• 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.

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

2FGLJ1800.5+7829 Data	2FGLJ1800.8-2400 Data	2FGLJ1801.3-2326e Data
2FGLJ1801.7+4405 Data	2FGLJ1802.3-2445c Data	2FGLJ1802.6-3940 Data
2FGLJ1802.8-6706 Data	2FGLJ1803.3-2148 Data	2FGLJ1803.6+2523c Data
2FGLJ1805.0-0845 Data	2FGLJ1805.6-2136e Data	2FGLJ1805.8+0612 Data
2FGLJ1806.7+6948 Data	2FGLJ1807.7-0419 Data	2FGLJ1808.3-3356 Data
2FGLJ1808.5-2037c Data	2FGLJ1808.6-1950c Data	2FGLJ1809.4+2042 Data
2FGLJ1809.7+2909 Data	2FGLJ1809.8-2332 Data	2FGLJ1810.7+1742 Data
2FGLJ1810.8+1606 Data	2FGLJ1811.0+5340 Data	2FGLJ1811.1-1905c Data
2FGLJ1811.3-2421 Data	2FGLJ1811.3+0339 Data	2FGLJ1813.4-1246 Data
2FGLJ1813.5+3143 Data	2FGLJ1813.6-2821 Data	2FGLJ1813.7-1139c Data
2FGLJ1813.7+0617 Data	2FGLJ1814.1-1735c Data	2FGLJ1815.6-6407 Data
2FGLJ1816.5+4511 Data	2FGLJ1816.7-4942 Data	2FGLJ1817.6-1651c Data
2FGLJ1818.6+0903 Data	2FGLJ1818.7+2138 Data	2FGLJ1819.3-1523 Data
2FGLJ1820.6-3219 Data	2FGLJ1820.6+3625 Data	2FGLJ1821.8+0830 Data
2FGLJ1823.1-1338c Data	2FGLJ1823.4-3014 Data	2FGLJ1823.6-3453 Data
2FGLJ1823.7+6856 Data	2FGLJ1823.8+4312 Data	2FGLJ1824.0+5650 Data
2FGLJ1824.5-1351e Data	2FGLJ1824.5+1013 Data	2FGLJ1824.8-2449 Data
2FGLJ1825.1-5231 Data	2FGLJ1826.1-1256 Data	2FGLJ1826.3-1450 Data
2FGLJ1827.4-0846 Data	2FGLJ1827.4-1445c Data	2FGLJ1827.6+1149 Data
2FGLJ1828.3-1124c Data	2FGLJ1828.7+3231 Data	2FGLJ1829.1-0340c Data
2FGLJ1829.1+2725 Data	2FGLJ1829.2+5402 Data	2FGLJ1829.3-2419 Data
2FGLJ1829.7+4846 Data	2FGLJ1829.8-0204c Data	2FGLJ1830.0+1325 Data
2FGLJ1830.1+0617 Data	2FGLJ1830.2-4441 Data	2FGLJ1830.4-1634 Data
2FGLJ1830.9-3132 Data	2FGLJ1831.2-1518 Data	2FGLJ1832.0-0200 Data
2FGLJ1832.2-6502 Data	2FGLJ1832.7-5700 Data	2FGLJ1833.1-0437c Data
2FGLJ1833.6-1032 Data	2FGLJ1833.6-2104 Data	2FGLJ1834.3-0848 Data
2FGLJ1834.7-0705c Data	2FGLJ1835.4+1036 Data	2FGLJ1835.4+1349 Data
2FGLJ1835.5-0649 Data	2FGLJ1835.6-3258 Data	2FGLJ1836.2+3137 Data
2FGLJ1836.2+5926 Data	2FGLJ1836.8-0623c Data	2FGLJ1837.3-0700c Data
2FGLJ1837.9+3821 Data	2FGLJ1838.7+4759 Data	2FGLJ1839.0-0102 Data
2FGLJ1839.0-0539 Data	2FGLJ1839.3-0558c Data	2FGLJ1839.7-0334c Data
2FGLJ1840.3-0413c Data	2FGLJ1841.2-0459c Data	2FGLJ1841.7+3221 Data
2FGLJ1842.3-5839 Data	2FGLJ1842.3+2740 Data	2FGLJ1842.8-0359c Data
2FGLJ1843.7-0312c Data	2FGLJ1844.3-0343c Data	2FGLJ1844.3+1548 Data
2FGLJ1844.7+5716 Data	2FGLJ1844.9-1116 Data	2FGLJ1846.4+0920 Data
2FGLJ1846.6-2519 Data	2FGLJ1847.2-0236 Data	2FGLJ1848.2-0139c Data
2FGLJ1848.5+3216 Data	2FGLJ1848.6+3241 Data	2FGLJ1849.3-0055 Data
2FGLJ1849.4+6706 Data	2FGLJ1849.5+2744 Data	2FGLJ1849.7-4310 Data
2FGLJ1849.9-0125c Data	2FGLJ1850.7-0014c Data	2FGLJ1852.5+4856 Data
2FGLJ1852.7+0047c Data	2FGLJ1852.8+0156c Data	2FGLJ1855.9+0121e Data
2FGLJ1856.2+0450c Data	2FGLJ1857.2+0055c Data	2FGLJ1857.6+0211 Data
2FGLJ1857.8+0355c Data	2FGLJ1858.1-2510 Data	2FGLJ1858.3-2218 Data
2FGLJ1858.5+0129c Data	2FGLJ1859.3+0312c Data	2FGLJ1901.1+0427 Data
2FGLJ1902.0-5109 Data	2FGLJ1902.3-1106 Data	2FGLJ1902.5-6746 Data
2FGLJ1902.7-7053 Data	2FGLJ1903.3+5539 Data	2FGLJ1904.8-0705 Data
2FGLJ1904.9-3720c Data	2FGLJ1906.5+0720 Data	2FGLJ1907.9+0602 Data
2FGLJ1908.8-0132 Data	2FGLJ1911.0+0905 Data	2FGLJ1911.1-2005 Data
2FGLJ1911.5-1908 Data	2FGLJ1912.0+1609 Data	2FGLJ1913.4+4440 Data
2FGLJ1913.8-1237 Data	2FGLJ1914.0+1436 Data	2FGLJ1914.4+0951c Data
2FGLJ1916.1+1106 Data	2FGLJ1917.0-3027 Data	2FGLJ1917.6-1921 Data
2FGLJ1918.2-4110 Data	2FGLJ1919.5-7324 Data	2FGLJ1921.1+1436c Data
2FGLJ1921.3-1231 Data	2FGLJ1921.3+0131 Data	2FGLJ1921.9-1608 Data
2FGLJ1922.6-7454 Data	2FGLJ1923.2+1408e Data	2FGLJ1923.4+2013 Data
2FGLJ1923.5-2105 Data	2FGLJ1924.8-2912 Data	2FGLJ1924.8+1724c Data
2FGLJ1924.9-1036 Data	2FGLJ1925.7-7836c Data	2FGLJ1927.0+6153 Data
2FGLJ1927.5+6117 Data	2FGLJ1928.8+1740c Data	2FGLJ1931.1+0938 Data
2FGLJ1931.8+1325 Data	2FGLJ1932.1+1913 Data	2FGLJ1933.3+0722 Data
2FGLJ1936.5-0855 Data	2FGLJ1936.8-4721 Data	2FGLJ1936.9+8402 Data
2FGLJ1937.2-3955 Data	2FGLJ1940.8-6213 Data	2FGLJ1941.6+7218 Data
2FGLJ1942.5-1024 Data	2FGLJ1942.7-8049c Data	2FGLJ1942.8+1033 Data
2FGLJ1942.9-3528 Data	2FGLJ1944.3+7325 Data	2FGLJ1946.1-3115 Data
2FGLJ1946.4-5402 Data	2FGLJ1946.7-1118 Data	2FGLJ1947.8-0739 Data
2FGLJ1949.4-1457 Data	2FGLJ1949.7+2405 Data	2FGLJ1949.9+0907 Data
2FGLJ1950.3+1223 Data	2FGLJ1952.6-3252 Data	2FGLJ1953.0+3253 Data
2FGLJ1954.3+2836 Data	2FGLJ1954.4-1607 Data	2FGLJ1954.6-1122 Data
2FGLJ1955.0-5639 Data	2FGLJ1955.2+1356 Data	2FGLJ1955.9-0241 Data
2FGLJ1957.9+5033 Data	2FGLJ1958.2-3848 Data	2FGLJ1958.4-3012 Data
2FGLJ1958.6+2845 Data	2FGLJ1958.6+4020 Data	2FGLJ1958.9+3844 Data
2FGLJ1959.1-4245 Data	2FGLJ1959.5+2047 Data	2FGLJ1959.6-2931 Data
2FGLJ1959.9-4727 Data	2FGLJ1959.9+3336c Data	2FGLJ1959.9+4212 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: Fri, Aug 02, 2019