Abstract
We present optical data which suggests that G quot;, the optical counterpart of the gamma-ray pulsar Geminga, possibly pulses in B with a period of 0.237 seconds. The similarity between the optical pulse shape and the gamma-ray light curve indicates that a large fraction of the optical emission is non-thermal in origin - contrary to recent suggestions based upon the total optical flux. The derived magnitude of the pulsed emission is m(B) = 26.0 + - 0.4. Whilst it is not possible to give an accurate figure for the pulsed fraction (due to variations in the sky background) we can give an 1 sigma upper limit of m(B) approximate to 27 for the unpulsed fraction.
| Original language | English (Ireland) |
|---|---|
| Journal | Astronomy & Astrophysics |
| Volume | 335 |
| Publication status | Published - 1 Jul 1998 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Shearer, A,Golden, A,Harfst, S,Butler, R,Redfern, RM,O'Sullivan, CMM,Neustroev, VV,Plokhotnichenko, VL,Cullum, M,Danks, A