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Title:
Chandra Observations of the Unidentified Gamma-Ray Source in Gamma-Cygni
Authors:
Becker, Werner
Publication:
Chandra Proposal ID #04500442
Publication Date:
09/2002
Origin:
CXC
Keywords:
Chandra Proposal ID #04500442
Bibliographic Code:
2002cxo..prop.1211B

Abstract

The nature of the unidentified gamma-ray source 2CG078+2 in the SNR G78.2+2.1 is a mystery since its discovery in the mid 70's with COS-B. Although its gamma-ray emission properties strongly argue for a Geminga-like radio-silent neutron star, this is not more than a working hypothesis. ROSAT observations of the remnant have discovered a possible X-ray counterpart in the 20' x 14' arcmin small EGRET error box. The sparse ROSAT data, however, do not support a detailed analysis nor do they provide an accurate position. Both are badly needed for further identification. We propose a 30 ksec ACIS-I observation of RX J2020.2+4026 to determine its position with sub-arcsec accuracy and to obtain enough counts for a detailed spectral analysis of this putative gamma-ray counterpart.
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