The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Investigating the nature of INTEGRAL Gamma-ray Bursts and sub-threshold triggers with Swift follow-up

Investigating the nature of INTEGRAL Gamma-ray Bursts and sub-threshold triggers with Swift follow-up
Investigating the nature of INTEGRAL Gamma-ray Bursts and sub-threshold triggers with Swift follow-up
We explore the potential of INTEGRAL to improve our understanding of the low fluence regime for explosive transients, such as GRBs. We probe the nature of the so-called ”WEAK” INTEGRAL triggers, when the gamma-ray instruments record intensity spikes that are below the usual STRONG significance thresholds. In a targeted Swift follow-up campaign, we observed 15 WEAK triggers. We find six of these can be classified as GRBs. This includes GRB 150305A, a GRB discovered from our campaign alone. We also identified a source coincident with one trigger, IGRW 151019, as a candidate AGN. We show that real events such as GRBs exist within the IBAS WEAK trigger population. A comparison of the fluence distributions of the full INTEGRAL IBAS and Swift BAT GRB samples showed that the two are similar. We also find correlations between the prompt gamma-ray and X-ray properties of the two samples, supporting previous investigations. We find that both satellites reach similar, low fluence levels regularly, although Swift is more sensitive to short, low fluence GRBs.
0035-8711
Higgins, A.B.
2cd85b9f-78d3-4357-a9c9-0f307e8c81c6
Starling, R.L.C.
2e607fc5-cefd-4fef-ac2f-b921f155f9b7
Götz, D.
c2307406-186a-4e39-aa44-7722654aa9e9
Mereghetti, S.
48a76aa0-1387-43b2-8ced-d465785ff077
Wiersema, K.
050aa7fc-adab-45da-a63d-d03b497988db
Maccarone, T.
4adf5215-b92f-4b5b-a019-63ae6ddc8cf0
Osborne, J.P.
edc077a5-96df-4189-a3da-5bf63507101a
Tanvir, N.R.
095ab81b-5bf4-4c42-9e4e-ef0bae032e56
O'Brien, P.T.
cd44bb80-61ef-43ef-b75f-49f74ed16ded
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Rowlinson, A.
099fbcb4-63ea-415c-a96a-6dfd0e2a3ead
Gehrels, N.
0127efd0-e963-4b22-a1a3-8490a837d7d3
Higgins, A.B.
2cd85b9f-78d3-4357-a9c9-0f307e8c81c6
Starling, R.L.C.
2e607fc5-cefd-4fef-ac2f-b921f155f9b7
Götz, D.
c2307406-186a-4e39-aa44-7722654aa9e9
Mereghetti, S.
48a76aa0-1387-43b2-8ced-d465785ff077
Wiersema, K.
050aa7fc-adab-45da-a63d-d03b497988db
Maccarone, T.
4adf5215-b92f-4b5b-a019-63ae6ddc8cf0
Osborne, J.P.
edc077a5-96df-4189-a3da-5bf63507101a
Tanvir, N.R.
095ab81b-5bf4-4c42-9e4e-ef0bae032e56
O'Brien, P.T.
cd44bb80-61ef-43ef-b75f-49f74ed16ded
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Rowlinson, A.
099fbcb4-63ea-415c-a96a-6dfd0e2a3ead
Gehrels, N.
0127efd0-e963-4b22-a1a3-8490a837d7d3

Higgins, A.B., Starling, R.L.C., Götz, D., Mereghetti, S., Wiersema, K., Maccarone, T., Osborne, J.P., Tanvir, N.R., O'Brien, P.T., Bird, A.J., Rowlinson, A. and Gehrels, N. (2017) Investigating the nature of INTEGRAL Gamma-ray Bursts and sub-threshold triggers with Swift follow-up. Monthly Notices of the Royal Astronomical Society. (doi:10.1093/mnras/stx1163).

Record type: Article

Abstract

We explore the potential of INTEGRAL to improve our understanding of the low fluence regime for explosive transients, such as GRBs. We probe the nature of the so-called ”WEAK” INTEGRAL triggers, when the gamma-ray instruments record intensity spikes that are below the usual STRONG significance thresholds. In a targeted Swift follow-up campaign, we observed 15 WEAK triggers. We find six of these can be classified as GRBs. This includes GRB 150305A, a GRB discovered from our campaign alone. We also identified a source coincident with one trigger, IGRW 151019, as a candidate AGN. We show that real events such as GRBs exist within the IBAS WEAK trigger population. A comparison of the fluence distributions of the full INTEGRAL IBAS and Swift BAT GRB samples showed that the two are similar. We also find correlations between the prompt gamma-ray and X-ray properties of the two samples, supporting previous investigations. We find that both satellites reach similar, low fluence levels regularly, although Swift is more sensitive to short, low fluence GRBs.

Text
Investigating the nature of INTEGRAL Gamma-ray bursts - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 8 May 2017
e-pub ahead of print date: 12 May 2017
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 410080
URI: http://eprints.soton.ac.uk/id/eprint/410080
ISSN: 0035-8711
PURE UUID: c224f191-5caf-4554-ba2c-e51d733ce4f9
ORCID for A.J. Bird: ORCID iD orcid.org/0000-0002-6888-8937

Catalogue record

Date deposited: 03 Jun 2017 04:02
Last modified: 22 Nov 2021 02:36

Export record

Altmetrics

Contributors

Author: A.B. Higgins
Author: R.L.C. Starling
Author: D. Götz
Author: S. Mereghetti
Author: K. Wiersema
Author: T. Maccarone
Author: J.P. Osborne
Author: N.R. Tanvir
Author: P.T. O'Brien
Author: A.J. Bird ORCID iD
Author: A. Rowlinson
Author: N. Gehrels

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×