The Library
The first observation of optical pulsations from a soft gamma repeater : SGR 0501+4516
Tools
Tools
Tools
Dhillon, V. S., Marsh, T. R., Littlefair, S. P., Copperwheat, C. M., Hickman, R. D. G. (Richard D. G.), Kerry, P. (Paul), Levan, A. J., Rea, N., Savoury, C. D. J., Tanvir, Nial R., Turolla, R. and Wiersema, K.. (2011) The first observation of optical pulsations from a soft gamma repeater : SGR 0501+4516. Monthly Notices of the Royal Astronomical Society: Letters, Vol.416 (No.1). L16-L20. ISSN 1745-3925
Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1745-3933.2011.01088.x
Abstract
We present high-speed optical photometry of the soft gamma repeater SGR 0501+4516, obtained with ULTRACAM on two consecutive nights approximately 4 months after the source was discovered via its gamma-ray bursts. We detect SGR 0501+4516 at a magnitude of i′= 24.4 ± 0.1. We present the first measurement of optical pulsations from a SGR, deriving a period of 5.7622 ± 0.0003 s, in excellent agreement with the X-ray spin period of the neutron star. We compare the morphologies of the optical pulse profile with the X-ray and infrared pulse profiles; we find that the optical, infrared and harder X-rays share similar double-peaked morphologies, but the softer X-rays exhibit only a single-peaked morphology, indicative of a different origin. The optical pulsations appear to be in phase with the X-ray pulsations and exhibit a root-mean-square pulsed fraction of 52 ± 7 per cent, approximately a factor of 2 greater than in the X-rays. Our results find a natural explanation within the context of the magnetar model for SGRs.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Neutron stars, Pulsars, Stellar oscillations |
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society: Letters |
| Publisher: | Wiley-Blackwell Publishing Ltd. |
| ISSN: | 1745-3925 |
| Date: | September 2011 |
| Volume: | Vol.416 |
| Number: | No.1 |
| Page Range: | L16-L20 |
| Identification Number: | 10.1111/j.1745-3933.2011.01088.x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Science and Technology Facilities Council (Great Britain) (STFC) |
| References: | Alpar M. A., 2001, ApJ, 554, 1245 Barthelmy S. D. et al., 2008, The Astronomer’s Telegram, 1676, 1 Bignami G. F., Caraveo P. A., 1996, ARA&A, 34, 331 Chatterjee P., Hernquist L., Narayan R., 2000, ApJ, 534, 373 Cheng K. S., Ruderman M., 1991, ApJ, 373, 187 Dhillon V. S. et al., 2005, MNRAS, 363, 609 Dhillon V. S. et al., 2007, MNRAS, 378, 825 Dhillon V. S. et al., 2009, MNRAS, 394, L112 Ertan U¨ ., Cheng K. S., 2004, ApJ, 605, 840 Fatkhullin T. et al., 2008, GRB Coordinates Network, 8160, 1 G¨o˘g¨us¸ E., Woods P., Kouveliotou C., 2008, The Astronomer’s Telegram, 1677, 1 G¨o˘g¨us¸ E. et al., 2010, ApJ, 722, 899 Hessels J., Rea N., Ransom S., Stappers B., 2008, GRB Coordinates Network, 8134, 1 Israel G. et al., 2005, A&A, 438, L1 Israel G. L. et al., 2008, The Astronomer’s Telegram, 1837, 1 Kern B., Martin C., 2002, Nat, 417, 527 Kosugi G., Ogasawara R., Terada H., 2005, ApJ, 623, L125 Mereghetti S., 2008, A&AR, 15, 225 Naylor T., 1998, MNRAS, 296, 339 Ofek E. O., Kiewe M., Arcavi I., 2008, GRB Coordinates Network, 8229, 1 Perna R., Hernquist L., 2000, ApJ, 544, L57 Press W. H., Rybicki G. B., 1989, ApJ, 338, 277 Rea N. et al., 2008, GRB Coordinates Network, 8159, 1 Rea N. et al., 2009, MNRAS, 396, 2419 Rea N. et al., 2010, Sci, 330, 944 Shearer A. et al., 1998, A&A, 335, L21 Smith J. A. et al., 2002, AJ, 123, 2121 Stellingwerf R. F., 1978, ApJ, 224, 953 Tanvir N. R., Varricatt W., 2008, GRB Coordinates Network, 8126, 1 Testa V. et al., 2008, A&A, 482, 607 Thompson C., Duncan R. C., 1995, MNRAS, 275, 255 Thompson C., Lyutikov M., Kulkarni S. R., 2002, ApJ, 574, 332 van Paradijs J., Taam R. E., van den Heuvel E. P. J., 1995, A&A, 299, L41 Woods P. M., G¨o˘g¨us¸ E., Kouveliotou C., 2008, The Astronomer’s Telegram, 1691, 1 Woods P. M., Thompson C., 2006, in LewinW. H. G., van der Klis M., eds, Compact Stellar X-ray Sources. Cambridge Univ. Press, Cambridge, p. 547 Zane S., Nobili L., Turolla R., 2011, in Rea N., TorresD. F., eds, High-Energy Emission from Pulsars and their Systems. Springer-Verlag,Berlin, p. 329 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/39835 |
Actions (login required)
 |
View Item |
