Oct 2026· Astrophysical Journal· Vol 1010· 0 citations· 74 references
Physics
Abstract
The fast radio burst FRB 200428, detected from the Galactic magnetar SGR J1935+2154 together with a contemporaneous X-ray burst, provided the first direct evidence that at least some FRBs originate from magnetars. Whether high-energy emission commonly accompanies other FRBs, however, remains unclear. Here, we perform a systematic search for high-energy counterparts to 336 FRBs from the CHIME/FRB burst catalog using Fermi/Gamma-ray Burst Monitor data in the 8–200 keV and 8–1000 keV bands. We find no statistically significant high-energy signal temporally associated with these events, and a stacked light-curve analysis likewise reveals no significant excess. We therefore derive 1024, 100, and 64 ms upper limits on the associated high-energy emission, typically at the level of ∼10−8–10−7 erg cm−2 s−1. These results place population-level constraints on the associated high-energy emission of FRBs and suggest that any such emission is either intrinsically weak, strongly dependent on geometry or burst conditions, or below the sensitivity of current instruments.
We present a search for radio pulses from the Galactic magnetar SGR 1935+2154, a well-known source of fast radio bursts (FRBs), at ∼110 MHz using the Large Phased Array (LPA) of the Pushchino Radio Astronomy Observatory. Data from two active periods in 2020 (March–May and September–November, with ∼3.5 minutes of daily...
Chen-Ran Hu, Jin-Huang Cao, S. Tyul'bashev et al.· Astrophysical Journal· 0 citations
IceCube has detected a diffuse flux of high-energy astrophysical neutrinos. While its astrophysical origin is unknown, a significant neutrino emission has been observed from the gamma-ray blazar TXS 0506+056 and the Seyfert galaxy NGC 1068. This suggests accretion by supermassive black holes as one of the candidate mec...
R. Abbasi, M. Ackermann, J. Adams et al.· 0 citations
Fast radio bursts (FRBs) are millisecond-duration radio transients observed at extragalactic distances, whose origin remains uncertain. Given their extremely short duration and high implied luminosities, magnetars are commonly identified as sources of FRBs. A small (∼ 2%) fraction of FRBs are known to repeat, but it is...
D. Pelliciari, L. Bruno, G. Bernardi et al.· Astronomy & Astrophysics· 0 citations
Some long duration gamma-ray bursts (LGRBs) are not associated with bright supernovae (SNe), indicating that their explosion mechanism differs from the traditional collapsar channel. SN-less LGRBs are rare, thus it remains unclear whether they are sporadic outliers or a substantial component of the GRB population. In t...
Yu-Han Yang, E. Troja, N. Monsalves et al.· 0 citations
Motivated by the discovery of PSR J0435+3233, a millisecond pulsar (MSP) with an exceptionally large observed period derivative of Ṗ=4.9×10−17ss−1 and a nominal spin-down luminosity of Ėnom=5.89×1037ergs−1 , we analyze ∼17.7 yr of Fermi-LAT data. We identify the cataloged source 4FGL J0435.5+3232, located only ∼0 .°...
Growing evidence suggests that many fast radio bursts (FRBs) originate from extragalactic magnetars. Like all neutron stars, magnetars may be kicked at birth to large velocities, the values of which directly inform the physics governing stellar explosions and compact object formation. A subset of repeating FRBs show si...
S. Ocker, A. L. Piro· 0 citations
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