Observations of the Geminga optical candidate

Details Observations of the Geminga optical candidate Observations of the Geminga optical candidate

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296..190h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 1, 1985, p. 190-196.

Astronomy and Astrophysics

Astrophysics

12

Astronomical Photometry, Astronomical Spectroscopy, Gamma Rays, X Ray Sources, Astrometry, Blue Stars, Color-Magnitude Diagram, Neutron Stars, Thermal Emission, White Dwarf Stars

Scientific paper

Spectroscopy and photometry is reported of the proposed optical counterpart of the X-ray source IE 0630+178, which in turn is a candidate for identification with the γ-ray source "Geminga". The magnitudes and colors are V = 21.2±0.2, B-V = 0.7±0.3, V-R = 0.8±0.2. The spectrum is featureless at the present signal-to-noise ratio and defies immediate classification, although the properties of a G star would be consistent with the optical data. The properties of the X-ray and optical objects and the statistical circumstances surrounding the identification process do not support a compelling argument for the association of the optical, X-ray and γ-ray sources.

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