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- Goddard Space Flight CenterUS884 papers
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56 papers · 1 filter
An X-ray View of Star Formation in the Central 3 kpc of NGC 2403
Mihoko Yukita, Douglas A. Swartz, Allyn F. Tennant +1
Archival Chandra observations are used to study the X-ray emission associated with star formation in the central region of the nearby SAB(s)cd galaxy NGC 2403. The distribution of…
All-Sky Earth Occultation Observations with the Fermi Gamma Ray Burst Monitor
Colleen A. Wilson-Hodge, E. Beklen, P. N Bhat +10
Using the Gamma Ray Burst Monitor (GBM) on-board Fermi, we are monitoring the hard X-ray/soft gamma ray sky using the Earth occultation technique. Each time a source in our catalog…
Magnetar Twists: Fermi/Gamma ray Burst Monitor (GBM) detection of SGR J1550-5418
Y. Kaneko, E. Gogus, C. Kouveliotou +12
SGR J1550-5418 (previously known as AXP 1E 1547.0-5408 or PSR J1550-5418) went into three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds…
The Spectral Energy Distribution of Fermi bright blazars
A. A. Abdo, M. Ackermann, M. Ajello +107
(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining ou…
The TANAMI Program
Cornelia Mueller, Matthias Kadler, Roopesh Ojha +23
TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) is a monitoring program to study the parsec-scale structures and dynamics of relativistic jets i…
Radio-Loud Narrow-Line Seyfert 1 as a New Class of Gamma-Ray AGN
LAT Collaboration, G. Ghisellini, L. Maraschi +1
We report the discovery with Fermi/LAT of gamma-ray emission from three radio-loud narrow-line Seyfert 1 galaxies: PKS 1502+036 (z=0.409), 1H 0323+342 (z=0.061) and PKS 2004-447 (z…