Other
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.6301m&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #63.01; Bulletin of the American Astronomical Society, Vol. 32, p.1506
Other
Scientific paper
The EGRET source \source\ is the brightest and most accurately positioned of the as-yet unidentified high-energy γ -ray sources at intermediate Galactic latitude (l,b=89o,25o). In the error box of \source, we find a weak, ultrasoft X-ray source at energies E < 0.3 keV in the \ro\ All-Sky Survey. Deep optical imaging at the location of this source, as pinpointed by an observation with the \ro\ HRI, reveals a blank field to a limit of V > 25.2. The corresponding lower limit on fX/f_V is 300, which signifies that the X-ray source \xray\ is probably a thermally emitting neutron star. Its X-ray flux is 10--40 times fainter than that of Geminga, the EGRET source which it most resembles. Recently, we completed a multiwavelength study of the region around \source, including X-ray, radio, and optical imaging surveys, as well as optical spectroscopic classification of all of the active objects in this area (Mirabal et al. 2000, ApJ, 541, 180). Identifications were made for all of the ROSAT and ASCA sources, except for \xray, to a flux limit of approximately 5 x 10-14 erg cm-2 s-1, which is 10-4 of the γ -ray flux. Since none of these other objects are in any way notable candidates for association with \source, we propose that \xray\ is the correct identification, and that it is a rotation-powered γ -ray pulsar which is either older or more distant than the prototype Geminga. We see marginal evidence for variability between two \ro\ HRI observations. If real, this would indicate that the X-ray emission has an external origin, perhaps due to intermittent heating of the polar caps by a variable particle accelerator. \xray\ could even be an old, recycled pulsar, which may nevertheless have a high γ -ray efficiency.
Halpern Jules P.
Mirabal Nestor
No associations
LandOfFree
A Neutron-Star Identification for the High-Energy Gamma-ray Source 3EG J1835+5918: The Next Geminga does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Neutron-Star Identification for the High-Energy Gamma-ray Source 3EG J1835+5918: The Next Geminga, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Neutron-Star Identification for the High-Energy Gamma-ray Source 3EG J1835+5918: The Next Geminga will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1724742