Search for correlations of GRB and cosmic rays

Jȩdrzejczak, K.; Kasztelan, Marcin; Mankiewicz, L.; Molak, M.; Nawrocki, K.; Piotrowski, L. W.; Sokołowski, M.; Szabelska, B.; Szabelski, J.; Wibig, T.; Wolfendale, A. W.; Wrochna, G.

doi:10.1007/s10509-007-9442-7

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Similar claims of such cosmic ray anisotropy has also been done in the past, but with the argument in favor of the connection with heliotail based on annual trend (Fujimoto et al, 2001). Interesting possibility of correlations between the VSB and the regions of enhanced correlation between the microwave background and the diffuse gamma rays above 1 GeV has been considered by Jedrzejczak et al (2007).…”

Section: Discussionmentioning

confidence: 99%

Observational constraints on the nature of very short gamma-ray bursts

Janiuk¹,

Cline²,

Otwinowski³

2011

New Astronomy

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We discuss a very peculiar subgroup of gamma-ray bursts among the BATSE sources. These bursts are very short ($T_{90} \le $0.1 s), hard, and came predominantly from a restricted direction of the sky (close to the Galactic anti-center). We analyze their arrival times and possible correlations, as well as the profiles of individual bursts. We find no peculiarities in the arrival times of Very Short Bursts (VSBs) despite their highly non-uniform spatial distribution. There is no dependence in the burst shapes on location. Bursts coming both from the burst-enhancement Galactic Anticenter region and from all other directions show considerable dispersion in their rise and fall times. Significant fraction of VSBs have multiple peaks despite their extremely short duration. Burst time properties are most likely to be consistent with two origin mechanisms: either with binary NS-NS mergers with low total masses passing through a phase of hypermassive neutron star, or with evaporation of the primordial black holes in the scenario of no photosphere formation.Comment: 25 pages, 14 figures; accepted to New Astronom

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Section: Discussionmentioning

confidence: 99%

Observational constraints on the nature of very short gamma-ray bursts

Janiuk¹,

Cline²,

Otwinowski³

2011

New Astronomy

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Do Very Short Gamma Ray Bursts Originate from Primordial Black Holes? Review

Cline¹,

Otwinowski²,

Czerny³

et al. 2011

IJAA

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We present the state of current research of Very Short Gamma Ray Bursts (VSGRBs) from seven GRB detectors. We found that VSGRBs form distinct class of GRBs, which in our opinion, in most cases can originate from the evaporating Primordial Black Holes (PBHs). Arguments supporting our opinion: 1) GRBs with time duration (T<sub>90</sub>) < 100 ms form distinct class: VSGRBs. 2) We observe significant anisotropy in the galactic angular distribution of BATSE VSGRB events. 3) V/Vmax distribution for BATSE VSGRB events indicates the local distance production. 4) VSGBBs have more energetic γ-ray burst than other GRBs with longer duration (KONUS). 5) We observe small number of afterglows in SWIFT VSGRB sample (25%), in contrast with the noticeable afterglow frequency in SGRB sample (78%). 6) Time profile of rising part BATSE VSGRBs is in agreement with the evaporation PBH model

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Search for correlations of GRB and cosmic rays

Cited by 2 publications

References 6 publications

Observational constraints on the nature of very short gamma-ray bursts

Observational constraints on the nature of very short gamma-ray bursts

Do Very Short Gamma Ray Bursts Originate from Primordial Black Holes? Review

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