Astronomers found a pulsar hurtling through space at nearly 2.5 million miles an hour - so fast it could travel the distance between Earth and the Moon in just 6 minutes. The discovery was made using NASA’s Fermi Gamma-ray Space Telescope and the National Science Foundation's Karl G. Jansky Very Large Array (VLA).
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As a supplement to the preliminary release of the fourth catalog of Fermi-LAT sources (4FGL), the updated model of interstellar gamma-ray emission that was used for the catalog analysis is also being made available. This new model, gll_iem_v07.fits, is provided as a FITS cube together with a detailed description of the construction of the model, including a set of caveats describing aspects of the model that will be updated in a future release. Accompanying the interstellar emission model are models for the isotropic emission for different LAT response functions and event types. As for the 4FGL catalog, the interstellar emission model and isotropic spectra were developed using Pass 8 P8R3 event selections. You can find more information about the new files on the LAT background models page.
The Ninth International Fermi Symposium will be held at the Misty Hills Conference Centre in Johannesburg, South Africa from March 29 to April 3, 2020. More details will be posted on the symposium website as they become available.
The (4FGL) catalog is based on the first eight years of LAT science data and is the largest and deepest ever in this energy range. It contains 5098 sources of gamma-rays from 50 MeV to 1 TeV. The catalog is provided as a FITS table, and is accompanied by important caveats as well as a draft of the paper describing the details of the catalog preparation. The source list is complete but some additional information will be added in a future, final release, including light curves and a complete set of analysis flags. The final release may also include more or revised information about multiwavelength associations of some sources. This release is being made at this time in support of proposal preparation for the Cycle 12 of the Fermi Guest Investigator program.
The proposal deadline for Fermi Cycle-12 stage-1 submissions is now Wednesday, March 20, 2019 at 16:30 EST. The previous deadline has been revised as a result of the recent government shutdown. Additional information is available on the Proposals Page of this website and on NSPIRES in the ROSES NRA, Appendix D.6. Cycle-12 is expected to start on time in August 2019.