Fermi LAT detection of a GeV flare from the radio-loud narrow-line Seyfert 1 Galaxy PKS 2004-447
Abstract
The Large Area Telescope (LAT), one of the two instruments on the Fermi Gamma-ray Space Telescope, has observed an increasing gamma-ray flux from a source positionally consistent with PKS 2004-447, also known as 4FGL J2007.9-4432 (The Fermi-LAT collaboration 2019, arXiv:1902.10045), with coordinates R.A.= 301.979929 deg, Decl.= -44.578967 deg (J2000; Gaia Collaboration, 2018, A & A, 616, A1), a radio-loud narrow-line Seyfert 1 galaxy at z=0.24 (Drinkwater et al., 1997, MNRAS, 284, 85). Although PKS 2004-447 is included in all Fermi-LAT gamma-ray source catalogs, it has so far not been reported in outburst.
- Publication:
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The Astronomer's Telegram
- Pub Date:
- October 2019
- Bibcode:
- 2019ATel13229....1G
- Keywords:
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- AGN