Search for gamma rays from SNe with a variable-size sliding-time-window analysis of the Fermi-LAT data

Abstract

We present a systematic search for gamma-ray emission from supernovae (SNe) in the Fermi Large Area Telescope (LAT) Pass 8 data. The sample of targets consists of 55,880 candidates from the Open Supernova Catalog. We searched for gamma rays from SNe by means of a variable-size sliding-time-window analysis. Our results confirm the presence of transient gamma-ray emission from the sources of non-AGN classes, including transitional pulsars, solar flares, gamma-ray bursts, novae, and the Crab Nebula, which are projected near some of these SN's positions, and also strengthen support to the variable signal in the direction of SN iPTF14hls. The analysis is successful in finding both short (e.g. solar flares) and long (e.g. transitional pulsars) high flux states. Our search reveals two new gamma-ray transient signals occurred in 2019 in the directions of optical transients that are SN candidates, AT2019bvr and AT2018iwp, with their flux increases within 6 months after the dates of SN's discoveries. These signals are bright and their variability is at a higher statistical level than that of iPTF14hls. An exploration of archival multi-wavelength observations towards their positions is necessary to establish their association with SNe or other classes of sources. Our analysis, in addition, shows a bright transient gamma-ray signal at low Galactic latitudes in the direction of PSR J0205+6449. In addition, we report the results of an all-sky search for gamma-ray transient sources. This provided two additional candidates to gamma-ray transient sources.

Published in MNRAS. Updated to address typos

References in corpus (13)

• The Supernova -- Gamma-Ray Burst Connection
• CGRaBS: An All-Sky Survey of Gamma-Ray Blazar Candidates
• A decade of Gamma-Ray Bursts observed by $Fermi$-LAT: The 2${}^{nd}$ GRB catalog
• Energetic eruptions leading to a peculiar hydrogen-rich explosion of a massive star
• Fermi-LAT Observations of Two Gamma-Ray Emission Components from the Quiescent Sun
• A Nova Outburst Powered by Shocks
• Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares
• Diversity of GRB energetics vs. SN homogeneity: supernova 2013cq associated with the gamma-ray burst 130427A
• A search for cyclical sources of gamma-ray emission on the period range from days to years in the Fermi-LAT sky
• Discovery of Gamma-ray Pulsations from the Transitional Redback PSR J1227-4853
• GRB171010A / SN2017htp: a GRB-SN at z=0.33
• Search for Early Gamma-ray Production in Supernovae Located in a Dense Circumstellar Medium with the Fermi LAT
• Upper Limits on Very-High-Energy Gamma-ray Emission from Core-Collapse Supernovae Observed with H.E.S.S

Cited by in corpus (10)

• Core-collapse supernovae in dense environments -- particle acceleration and non-thermal emission
• An update on Fermi-LAT transients in the Galactic plane, including strong activity of Cygnus X-3 in mid-2020
• The first days of type II-P core collapse supernovae in the gamma-ray range
• Early-time gamma-ray constraints on cosmic-ray acceleration in the core-collapse SN 2023ixf with the Fermi Large Area Telescope
• A Very-High-Energy Gamma-Ray View of the Transient Sky
• Quantifying the dust in SN 2012aw and iPTF14hls with ORBYTS
• Gamma-ray signature of superluminous supernovae: Fermi-LAT GeV detection of SN 2017egm and evidence of a central engine
• Evidence for GeV emission of the superluminous supernova SN 2017egm
• Interacting supernovae and where to find them
• A blind search for intraday gamma-ray transients with Fermi-LAT: Detections of GRB and solar emissions