Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4247h&link_type=abstract
HST Proposal ID #4247
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #4247 Stellar Astrophysics
Scientific paper
The gamma-ray source Geminga (identified with the X-ray source 1E0630+178) is a near-by neutron star detected as a 237 ms pulsar in both the X-ray and gamma-ray region of the spectrum (Halpern and Holt, 1992). It is not detected as a radio pulsar, however. We will observe the proposed optical counterpart of Geminga (star G" in the list of Halpern and Tytler, 1988) in the UV (140 - 300 nm) with the High Speed Photometer in an attempt to detect the 237 ms pulsation. An offset of 1.3 arcmin from GSC 01333.01169 will be required to acquire G". A positive detection of the 237 ms period will confirm the identity of G" as Geminga and extend our knowledge of the spectrum of a neutron star into the UV; a negative result may place important constraints on the standard model of neutron star emission.
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