Shearer, A and Golden, Aaron and Harfst, S and Butler, R. and Redfern, R. M. and O'Sullivan, Créidhe and Beskin, G. M. and Neizvestny, S. I. and Neustroev, V. V. and Plokhotnichenko, V.L. and Cullum, M and Danks, A.
(2008)
Possible pulsed optical emission from Geminga.
Astronomy and Astrophysics, 335 (1).
pp. 1-6.
ISSN 0004-6361
Abstract
We present optical data which suggests that G", 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 ~ 27 for the unpulsed fraction.
| Item Type: |
Article
|
| Keywords: |
pulsars; individual; Geminga; techniques;
2-d photon-counting detectors; |
| Academic Unit: |
Faculty of Science and Engineering > Experimental Physics |
| Item ID: |
18854 |
| Depositing User: |
Dr. Créidhe O'Sullivan
|
| Date Deposited: |
10 Sep 2024 15:02 |
| Journal or Publication Title: |
Astronomy and Astrophysics |
| Publisher: |
EDP Sciences |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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