2023RAA....23l5003Z

Query : 2023RAA....23l5003Z

2023RAA....23l5003Z - Research in Astron. and astroph., 23, part no 12, 5003 (2023/December-0)

Redshift Dependence of the Low-energy Spectral Index of Gamma-Ray Bursts Revisited.

ZHANG X.-L., HUANG Y.-F. and ZOU Z.-C.

Abstract (from CDS):

A negative correlation was found to exist between the low-energy spectral index and the redshift of gamma-ray bursts (GRBs) by Amati et al. It was later confirmed by Geng & Huang and Gruber et al., but the correlation was also found to be quite dispersive when the sample size was significantly expanded. In this study, we have established two even larger samples of GRBs to further examine the correlation. One of our samples consists of 316 GRBs detected by the Swift satellite, and the other one consists of 80 GRBs detected by the Fermi satellite. It is found that there is no correlation between the two parameters for the Swift sample, but there does exist a weak negative correlation for the Fermi sample. The correlation becomes even more significant when the spectral index at the peak flux is considered. It is argued that the absence of the correlation in the Swift sample may be due to the fact that Swift has a very narrow energy response so that it could not measure the low-energy spectral index accurately enough. Further studies based on even larger GRB samples are solicited.

Abstract Copyright: © 2023. National Astronomical Observatories

Journal keyword(s): (stars:) gamma-ray burst: general - methods: statistical - catalogs

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Fermi bn120712571 gB 11 18 21.16 -20 02 01.1           ~ 90 0

Query : 2023RAA....23l5003Z

Basic data :
Fermi bn120712571 -- Gamma-ray Burst
Other object types: otypes_help 		gB (2016ApJS,GRB,...)
ICRS coord. (ep=J2000) : 		11 18 21.16 -20 02 01.1 (X-ray) [ 1400 1400 0 ] D SWIFT
FK4 coord. (ep=B1950 eq=1950) : 		11 15 51.91 -19 45 36.3 [ 1400 1400 0 ]
Gal coord. (ep=J2000) : 		274.94343 +37.72736 [ 1400 1400 0 ]
Radial velocity / Redshift / cz : 		V(km/s) 278206 [~] / z(~) 4.1745 [~] / cz 1251484 [~]
   D 2012GCN.13460....1X
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (2) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GRB 120712A Fermi bn120712571

References (90 between 1850 and 2026) (Total 90)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

External archives :

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2023RAA....23l5003Z and select 'bookmark this link' or equivalent in the popup menu