Abstract
We have performed deep searches for radio pulsations from four southern anomalous X-ray pulsars (AXPs) to investigate their physical nature in comparison with the rotation powered pulsars. The data were acquired using the Parkes radio telescope with the 1.4 GHz multibeam receiver. No pulsed emission with periodicity matching the X-ray ephemeris have been found in the observed targets down to a limit of ∼0.1 mJy. A blind search has also been performed on all the 13 beams of the multibeam receiver (the central beam being pointed on the target AXP), leading to the serendipitous discovery of two new radio pulsars and to the further detection of 18 pulsars. Also a search for single dispersed pulses has been performed in the aim to detect signals similar to those of the recently discovered rotating radio transients.
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References
Baring, M.G., Harding, A.K.: Astrophys. J. 507, L55 (1998)
Cameron, P.B., Chandra, P., Ray, A., et al.: Nature 434, 1112 (2005)
Camilo, F., Kaspi, V.M., Lyne, A.G., et al.: Astrophys. J. 541, 367 (2000)
Camilo, F., Ransom, S.M., Halpern, J.P., Reynolds, J., Helfand, D.J., Zimmerman, N., Sarkissian, J.: Nature 442, 892 (2006)
Cordes, J.M., Lazio, T.J.W.: preprint, astro-ph/0207156 (2002)
Cordes, J.M., McLaughlin, M.A.: Astrophys. J. 596, 1142 (2003)
Crawford, F., Pivovaroff, M.J., Kaspi, V.M., Manchester, R.N.: In: Slane, P., Gaensler, B. (eds.) Neutron Stars in Supernova Remnants A Sensitive Targeted Search Campaign at Parkes to Find Young Radio Pulsars at 20 cm. ASP Conf. Ser., vol. 271, pp. 37 (2002)
Damour, T., Taylor, J.H.: Phys. Rev. D 45, 1840 (1992)
Frail, D.A., Kulkarni, S.R., Bloom, J.S.: Nature 398, 127 (1999)
Gaensler, B.M., Slane, P.O., Gotthelf, E.V., et al.: Astrophys. J. 559, 963 (2001)
Gaensler, B.M., Kouveliotou, C., Gelfand, J.D., et al.: Nature 434, 1104 (2005)
Gaensler, B.M., McClure-Griffiths, N.M., Oey, M.S., et al.: Astrophys. J. 620, L95 (2005)
Gotthelf, E.V., Halpern, J.P.: Astrophys. J. 632, 1075 (2005)
Gotthelf, E.V., Vasisht, G.: New Astron. 3, 293 (1998)
Gotthelf, E.V., Gavriil, F.P., Kaspi, V.M., et al.: Astrophys. J. 564, L31 (2002)
Halpern, J.P., Gotthelf, E.V., Becker, R.H., et al.: Astrophys. J. 632, L29 (2005)
Kramer, M., Bell, J.F., Manchester, R.N., et al.: Mon. Not. Roy. Astron. Soc. 342, 1299 (2003)
Manchester, R.N., Lyne, A.G., Camilo, F., Bell, J.F., Kaspi, V.M., D’Amico, N., McKay, N.P.F., Crawford, F., Stairs, I.H., Possenti, A., Kramer, M., Sheppard, D.C.: Mon. Not. Roy. Astron. Soc. 328, 17 (2001)
McLaughlin, M.A., Stairs, I.H., Kaspi, V.M., et al.: Astrophys. J. 591, L135 (2003)
McLaughlin, M.A., Lyne, A.G., Lorimer, D.R., et al.: Nature 439, 817 (2006)
Popov, S.B., Turolla, R., Possenti, A.: Mon. Not. Roy. Astron. Soc. 369, L23 (2006)
Reynolds, S.P., Borkowski, K.J., Gaensler, et al.: Astrophys. J. 639, L71 (2006)
Rea, N., Testa, V., Israel, G.L., et al.: Astron. Astrophys. 425, L5 (2004)
Rea, N., Oosterbroek, T., Zane, S., et al.: Mon. Not. Roy. Astron. Soc. 361, 710 (2005)
Staveley-Smith, L., Wilson, W.E., Bird, T.S., et al.: Proc. Astron. Soc. Aust. 13, 243 (1996)
Taylor, J.H., Cordes, J.M.: Astrophys. J. 411, 674 (1993)
Thompson, C., Duncan, R.C.: Mon. Not. Roy. Astron. Soc. 275, 255 (1995)
Thorsett, S.E., Dewey, R.J.: Astrophys. J. 419, L65 (1993)
Tiengo, A., Mereghetti, S., Turolla, R., et al.: Astron. Asrophys. 437, 997 (2005)
Weltevrede, P., Stappers, B.W., Rankin, J.M., et al.: Astrophys. J. 645, L149 (2006)
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Burgay, M., Rea, N., Israel, G. et al. Search for radio pulsations in four anomalous X-ray pulsars and discovery of two new pulsars. Astrophys Space Sci 308, 531–534 (2007). https://doi.org/10.1007/s10509-007-9353-7
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DOI: https://doi.org/10.1007/s10509-007-9353-7