A Search for the X‐Ray Counterpart of the Unidentified γ‐Ray Source 3EG J2020+4017 (2CG078+2) | Zendy

Martin C. Weisskopf | Zendy; Douglas A. Swartz | Zendy; A. Carramiñana | Zendy; Luis Carrasco | Zendy; D. L. Kaplan | Zendy; W. Becker | Zendy; Ronald F. Elsner | Zendy; G. Kanbach | Zendy; Stephen L. O’Dell | Zendy; Allyn F. Tennant | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

A Search for the X‐Ray Counterpart of the Unidentified γ‐Ray Source 3EG J2020+4017 (2CG078+2)

Author(s) -

Martin C. Weisskopf,

Douglas A. Swartz,

A. Carramiñana,

Luis Carrasco,

D. L. Kaplan,

W. Becker,

Ronald F. Elsner,

G. Kanbach,

Stephen L. O’Dell,

Allyn F. Tennant

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/508339

Subject(s) - physics , astrophysics , pulsar , observatory , sky , supernova , astronomy , active galactic nucleus , supernova remnant , stars , gamma ray , optical spectra , galactic center , x ray , spectral line , galaxy , optics

We report observations with the Chandra X-ray Observatory of a field in thegamma$-Cygni supernova remnant (SNR78.2+2.1) centered on the cataloged locationof the unidentified, bright gamma-ray source 3EG J2020+4017. In this search foran X-ray counterpart to the gamma-ray source, we detected 30 X-ray sources. Ofthese, we found 17 strong-candidate counterparts in optical (visible throughnear-infrared) cataloged and an additional 3 through our optical observations.Based upon colors and (for several objects) optical spectra, nearly all theoptically identified objects appear to be reddened main-sequence stars. None ofthe X-ray sources with an optical counterpart is a plausible X-ray counterpartto 3EG J2020+4017 --if that gamma-ray source is a spin-powered pulsar. Many ofthe 10 X-ray sources lacking optical counterparts are likely (extragalactic)active galactic nuclei, based upon the sky density of such sources. Althoughone of the 10 optically unidentified X-ray sources could be the gamma-raysource, there is no auxiliary evidence supporting such an identification.Comment: 32 pages, 8 figures, submitted to Ap

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research