Abstract
A. Shearer, A. Golden, and R. M. Redfern, National University of Ireland, Galway; and G. M. Beskin, Special Astrophysical Observatory, write: We observed PSR J0633+1746 (Geminga) on 1996 Jan. 12-14 with the Russian 6-m telescope (+ TRIFFID camera + MAMA detector) in bands B (29 307 s) and V (6829 s). We found optical pulsations in B with magnitude 26.0 + - 0.4 and a 3-sigma upper limit for pulsations in V of about 25.5. Enhanced sky brightness limited a detection in V. The significance of the B result using the phase-independent Z statistic is 99.96 percent, using the ephemeris by Mattox et al. (1996, A.Ap. Suppl. 120, C77). The corresponding lightcurve shows two peaks in phase with gamma-ray and hard-x-ray data, testifying to a dominant non-thermal component in B. Deeper time-resolved exposures in B, V, R, and I should confirm pulsed activity in these other wavebands, and provide important data as regards understanding the thermal and nonthermal components of Gemingas emission.
| Original language | English (Ireland) |
|---|---|
| Number of pages | 2 |
| Journal | \iaucirc |
| Volume | 6787 |
| Publication status | Published - 1 Dec 1997 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Shearer
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