The Next Geminga: A Neutron Star Identification for the Egret Source 3EG J1835+5918

Details The Next Geminga: A Neutron Star Identification for the Egret Source 3EG J1835+5918 The Next Geminga: A Neutron Star Identification for the Egret Source 3EG J1835+5918

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9278h&link_type=abstract

HST Proposal ID #9278

Computer Science

Hst Proposal Id #9278

Scientific paper

3EG J1835+5918 is the brightest of the so-called unidentified EGRET sources at intermediate Galactic latitude {l, b}={89, 25}. We obtained complete radio, optical, and X-ray coverage of its error box, discovering a faint ultrasoft X-ray source that can only be a nearby neutron star. 3EG J1835+5918 may thus become the prototype of an hypothesized population of older pulsars, born in the Gould belt, that can account for as many as 40 local EGRET sources. We propose to prove that it is a neutron star and assess its point of origin by obtaining precise coordinates with Chandra and deep HST images to measure its color and proper motion. X-ray spectral information will address its temperature, age, distance, and thus its gamma-ray efficiency.

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