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The Fermi Gamma Ray Space Telescope discovers the Pulsar in the Young Galactic Supernova-Remnant CTA 1
Fermi LAT Collaboration
Energetic young pulsars and expanding blast waves (supernova remnants, SNRs) are the most visible remains after massive stars, ending their lives, explode in core-collapse supernov…
Polarization of the Crab pulsar and nebula as observed by the Integral/IBIS telescope
M. Forot, Philippe Laurent, I A. Grenier +2
Neutron stars generate powerful winds of relativistic particles that form bright synchrotron nebulae around them. Polarimetry provides a unique insight into the geometry and magnet…
A revised catalogue of EGRET gamma-ray sources
Jean-Marc Casandjian, Isabelle A. Grenier
We present a catalog of point gamma-ray sources detected by the EGRET detector aboard the Compton Gamma Ray Observatory. We have used the whole gamma-ray dataset of reprocessed pho…
The Galactic gamma-ray club
Isabelle A. Grenier
The exclusive Galactic gamma-ray club has opened up to new members. Supernova remnants, pulsar wind nebulae, and massive binary systems hosting a compact object have recently joine…
CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
Stephen E. Healey, Roger W. Romani, Garret Cotter +7
We describe a uniform all-sky survey of bright blazars, selected primarily by their flat radio spectra, that is designed to provide a large catalog of likely gamma-ray AGN. The def…
The Diffuse Galactic Gamma-Ray Emission Model for GLAST LAT
T. A. Porter, S. W. Digel, I. A. Grenier +2
Diffuse emission from the Milky Way dominates the gamma-ray sky. About 80% of the high-energy luminosity of the Milky Way comes from processes in the interstellar medium. The Galac…
The Geminga Fraction
Alice K. Harding, Isabelle A. Grenier, Peter L. Gonthier
Radio-quiet gamma-ray pulsars like Geminga may account for a number of the unidentified EGRET sources in the Galaxy. The number of Geminga-like pulsars is very sensitive to the geo…
Pulsar twinkling and relativity
Isabelle A. Grenier, Alice K. Harding
The number of pulsars with detected emission at X-ray and gamma-ray energies has been steadily growing, showing that beams of high-energy particles are commonly accelerated in puls…
On the local birth place of Geminga
L. J. Pellizza, R. P. Mignani, I. A. Grenier +1
Using estimates of the distance and proper motion of Geminga and the constraints on its radial velocity posed by the shape of its bow shock, we investigate its birth place by traci…
Cosmic-ray propagation properties for an origin in SNRs
I. Buesching, A. Kopp, M. Pohl +3
We have studied the impact of cosmic-ray acceleration in SNR on the spectra of cosmic-ray nuclei in the Galaxy using a series expansion of the propagation equation, which allows us…
The Gould Belt, star formation, and the local interstellar medium
Isabelle A. Grenier
The history of the local medium, within a few hundred parsecs, is dominated by the evolution of the Gould Belt. The event that triggered this star-forming region and molded the gas…
Unidentified gamma-ray sources off the Galactic plane as low-mass microquasars?
I. A. Grenier, M. M. Kaufman Bernado, G. E. Romero
A subset of the unidentified EGRET gamma-ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-ter…
INTEGRAL observation of 3EG J1736-2908
G. Di Cocco, L. Foschini, P. Grandi +10
The possible identification by INTEGRAL of the EGRET source 3EG J1736-2908 with the active galactic nucleus GRS 1734-292 is discussed. The latter was discovered in 1990 and later i…
Study of Unidentified EGRET sources with INTEGRAL: first results and future prospects
G. Di Cocco, A. J. Castro-Tirado, S. Chaty +12
The primary objective of the study of unidentified EGRET sources with INTEGRAL is to locate with a few arcminute accuracy the hard X-ray / soft gamma-ray counterparts within the EG…
Unidentified Gamma-Ray Sources and Microquasars
G. E. Romero, I. A Grenier, M. M. Kaufman Bernado +2
Some phenomenological properties of the unidentified EGRET detections suggest that there are two distinct groups of galactic gamma-ray sources that might be associated with compact…
Pulsar Populations and Unidentified Gamma-Ray Sources
A. K. Harding, P. L. Gonthier, I. A. Grenier +1
The EGRET telescope on the Compton Gamma-Ray Observatory detected over 200 sources and the majority of these are still unidentified. At least three subpopulations of EGRET sources…
Variability of EGRET Gamma-Ray Sources
P. L. Nolan, W. F. Tompkins, I. A. Grenier +1
The variability of the high-energy gamma ray sources in the Third EGRET catalog is analyzed by a new method. We re-analyze the EGRET data to calculate a likelihood function for the…
3D dynamical evolution of the interstellar gas in the Gould Belt
Christophe A. Perrot, Isabelle A. Grenier
The dynamical evolution of the Gould Belt has been modelled in 3D and confronted to the spatial and velocity distributions of all HI and H2 clouds found within a few hundred parsec…
Unidentified EGRET sources in the Galaxy
I. A. Grenier
Identifying gamma-ray sources in the Galaxy is hampered by their poor localization, source confusion, and the large variety of potential emitters. Neutron stars and their environme…
Gamma-ray sources as relics of recent supernovae in the nearby Gould Belt
I. A. Grenier
The nearby, 30 to 40 Myr old, starburst region of the Gould Belt has formed numerous massive stars. Within its 300 pc radius, it produces core-collapse supernovae at an enhanced ra…
Detection of arcs in Saturn's F ring during the 1995 Sun ring-plane crossing
S. Charnoz, A. Brahic, C. Ferrari +3
Observations of the November 1995 Sun crossing of the Saturn's ring-plane made with the 3.6m CFH telescope, using the UHAO adaptive optics system, are presented here. We report the…
Photons and Particle Production in Cassiopeia A: Predictions from Nonlinear Diffusive Shock Acceleration
Donald C. Ellison, Philippe Goret, Matthew G. Baring +2
We calculate particle spectra and continuum photon emission from the Cassiopeia A supernova remnant (SNR). The particle spectra, ion and electron, result from diffusive shock accel…
Very High Energy Gamma-ray spectral properties of Mrk 501 from CAT Cerenkov telescope observations in 1997
A. Djannati-Atai, F. Piron, A. Barrau +31
The BL Lac object Mrk 501 went into a very high state of activity during 1997, both in VHE gamma-rays and X-rays. We present here results from observations at energies above 250 Ge…
Radio to Gamma-Ray Emission from Shell-type Supernova Remnants: Predictions from Non-linear Shock Acceleration Models
Matthew G. Baring, Donald C. Ellison, Stephen P. Reynolds +2
Supernova remnants (SNRs) are widely believed to be the principal source of galactic cosmic rays. Such energetic particles can produce gamma-rays and lower energy photons via inter…