LAT Light Curve Analysis: Aperture Photometry and ... - Fermi - NASA

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R. Corbet Steps It is recommended to use a script to chain together the tools. fkeypar – determine file start <strong>and</strong> stop times gtselect – filter data based on time, zenith limit, energy, position, <strong>and</strong> event class gtmktime – create good time intervals gtbin – make quasi-light curve (counts rather than rate) fdump – export data other tools – convert counts to rates, calculate errors COSPAR CBW 2010 10
Get Photon File Start/Stop Times $ fkeypar "L090923112502E0D2F37E71_PH00.fits[1]" TSTART (photon start time = 266976000.) $ fkeypar "L090923112502E0D2F37E71_PH00.fits[1]" TSTOP (photon stop time = 275369897.) The values obtained with “fkeypar” will then be accessible using “pget” R. Corbet COSPAR CBW 2010 11
Page 1 and 2: R. Corbet LAT Light Curve Analysis:
Page 3 and 4: R. Corbet What is Photometry? Phot
Page 5 and 6: R. Corbet LAT Photometry LAT light
Page 7 and 8: LAT Aperture Optimization In optic
Page 9: Tools Used for Aperture Photometry
Page 13 and 14: R. Corbet Calculate GTIs (Good Time
Page 15 and 16: Calculate Exposures of Time Bins $
Page 17 and 18: R. Corbet COSPAR CBW 2010 17
Page 19 and 20: R. Corbet barycentering barycenter
Page 21 and 22: R. Corbet Crude Approach to Low-Cou
Page 23 and 24: Looking for Binary Orbital Periods
Page 25: Power Spectrum of a Note Played R.
Page 28 and 29: R. Corbet Calculating Power Spectra
Page 30 and 31: • What should be done if data poi
Page 32 and 33: Weighting Can Reveal Orbital Period
Page 34 and 35: How should LAT data be weighted? W
Page 36 and 37: Exposure Weighted Rates vs. Unweigh
Page 38: Results of Looking for Binary Orbit

LAT Light Curve Analysis: Aperture Photometry and ... - Fermi - NASA

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