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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2203.14947 (astro-ph)
[Submitted on 28 Mar 2022]

Title:New candidates for magnetar counterparts from a deep search with the Hubble Space Telescope

Authors:A. A. Chrimes, A. J. Levan, A. S. Fruchter, P. J. Groot, C. Kouveliotou, J. D. Lyman, N. R. Tanvir, K. Wiersema
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Abstract:We report the discovery of six new magnetar counterpart candidates from deep near-infrared Hubble Space Telescope imaging. The new candidates are among a sample of nineteen magnetars for which we present HST data obtained between 2018-2020. We confirm the variability of previously established near-infrared counterparts, and newly identify candidates for PSRJ1622-4950, SwiftJ1822.3-1606, CXOUJ171405.7-381031, SwiftJ1833-0832, SwiftJ1834.9-0846 and AXJ1818.8-1559 based on their proximity to X-ray localisations. The new candidates are compared with the existing counterpart population in terms of their colours, magnitudes, and near-infrared to X-ray spectral indices. We find two candidates for AXJ1818.8-1559 which are both consistent with previously established counterparts. The other new candidates are likely to be chance alignments, or otherwise have a different origin for their near-infrared emission not previously seen in magnetar counterparts. Further observations and studies of these candidates are needed to firmly establish their nature.
Comments: 11 pages, 5 figures, 3 tables, accepted for publication in MNRAS
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:2203.14947 [astro-ph.HE]
  (or arXiv:2203.14947v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2203.14947
Related DOI: https://doi.org/10.1093/mnras/stac870

Submission history

From: Ashley Chrimes [view email]
[v1] Mon, 28 Mar 2022 17:55:19 UTC (1,151 KB)
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