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Discovery of two new fast X-ray transients with INTEGRAL: IGR J03346+4414 and IGR J20344+3913

Discovery of two new fast X-ray transients with INTEGRAL: IGR J03346+4414 and IGR J20344+3913
Discovery of two new fast X-ray transients with INTEGRAL: IGR J03346+4414 and IGR J20344+3913
We report on the discovery of two fast X-ray transients (FXTs) from analysis of archival INTEGRAL data. Both are characterized by a remarkable hard X-ray activity above 20?keV, in terms of duration (?15 and 30 min, respectively), peak flux (?10?9?erg?cm?2 s?1) and dynamic range (?2400 and 1360, respectively). Swift/X-ray telescope follow-up observations failed to detect any quiescent or low-level soft X-ray emission from either of the two FXTs, providing an upper limit of the order of a few times 10?12?erg?cm?2 s?1. The main spectral and temporal Imager on Board INTEGRAL Satellite (IBIS)/INTEGRAL Soft Gamma-Ray Imager (ISGRI) characteristics are presented and discussed with the aim of inferring possible hints on their nature.
0035-8711
2885-2892
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Sidoli, L.
2207422d-1a4d-448c-8c0b-8f0c2bf78a18
Paizis, A.
1f5ac404-8b17-43be-8e4a-6ada9bbf480c
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Sguera, V.
371bb568-7e56-496e-a624-dba6de79d9e1
Sidoli, L.
2207422d-1a4d-448c-8c0b-8f0c2bf78a18
Paizis, A.
1f5ac404-8b17-43be-8e4a-6ada9bbf480c
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32

Sguera, V., Sidoli, L., Paizis, A. and Bird, A.J. (2016) Discovery of two new fast X-ray transients with INTEGRAL: IGR J03346+4414 and IGR J20344+3913. Monthly Notices of the Royal Astronomical Society, 463 (3), 2885-2892. (doi:10.1093/mnras/stw2183).

Record type: Article

Abstract

We report on the discovery of two fast X-ray transients (FXTs) from analysis of archival INTEGRAL data. Both are characterized by a remarkable hard X-ray activity above 20?keV, in terms of duration (?15 and 30 min, respectively), peak flux (?10?9?erg?cm?2 s?1) and dynamic range (?2400 and 1360, respectively). Swift/X-ray telescope follow-up observations failed to detect any quiescent or low-level soft X-ray emission from either of the two FXTs, providing an upper limit of the order of a few times 10?12?erg?cm?2 s?1. The main spectral and temporal Imager on Board INTEGRAL Satellite (IBIS)/INTEGRAL Soft Gamma-Ray Imager (ISGRI) characteristics are presented and discussed with the aim of inferring possible hints on their nature.

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Accepted/In Press date: 26 August 2016
e-pub ahead of print date: 1 September 2016
Published date: 11 December 2016
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 403367
URI: http://eprints.soton.ac.uk/id/eprint/403367
ISSN: 0035-8711
PURE UUID: ab20b6dc-e277-4ded-bde6-b88bb738ede0
ORCID for A.J. Bird: ORCID iD orcid.org/0000-0002-6888-8937

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Date deposited: 30 Nov 2016 11:55
Last modified: 20 Jul 2019 01:22

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