J/A+A/582/A111 List of 389 GRBs (Li+, 2015)
Testing the homogeneity of the Universe using gamma-ray bursts.
Li M.-H., Lin H.-N.
<Astron. Astrophys. 582, A111 (2015)>
=2015A&A...582A.111L 2015A&A...582A.111L (SIMBAD/NED BibCode)
ADC_Keywords: Gamma rays ; Redshifts
Keywords: gamma rays: general - methods: data analysis - methods: statistical -
large-scale structure of Universe - cosmology: observations -
distance scale
Abstract:
The discovery of a statistically significant clustering in the
distribution of gamma-ray bursts (GRBs) has recently been reported.
Given that the cluster has a characteristic size of 2000-3000Mpc
and a redshift between 1.6≤z≤2.1, it has been claimed that
this structure is incompatible with the cosmological principle of
homogeneity and isotropy of our Universe. In this paper, we study the
homogeneity of the GRB distribution using a subsample of the Greiner
GRB catalogue, which contains 314 objects with redshift 0<z<2.5
(244 of them discovered by the Swift GRB mission). We try to reconcile
the dilemma between the new observations and the current theory of
structure formation and growth.
To test the results against the possible biases in redshift
determination and the incompleteness of the Greiner sample, we also
apply our analysis to the 244 GRBs discovered by Swift and the
subsample presented by the Swift Gamma-Ray Burst Host Galaxy Legacy
Survey (SHOALS). The real space two-point correlation function (2PCF)
of GRBs, ξ(r), is calculated using a Landy-Szalay estimator. We
perform a standard least-Χ2 fit to the measured 2PCFs of GRBs.
We use the best-fit 2PCF to deduce a recently defined homogeneity
scale. The homogeneity scale, RH, is defined as the comoving radius
of the sphere inside which the number of GRBs N(<r) is proportional to
r3 within 1%, or equivalently above which the correlation dimension
of the sample D2 is within 1% of D2=3.
Description:
Data for the 314 GRBs from J. Greiner's collection
(http://www.mpe.mpg.de/~jcg/grbgen.html, due to July, 2015) and 75
GRBs from Perley et al. (2015, arXiv:astro-ph/1504.02482v2) used in
the above work are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 314 Data for the 314 GRBs from Greiner (2015,
http://www.mpe.mpg.de/~jcg/grbgen.html)
used in this work
table2.dat 46 75 Data for the 75 GRBs from Perley et al. (2015,
arXiv:astro-ph/1504.02482v2) used in this work
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See also:
http://www.mpe.mpg.de/~jcg/grbgen.html : Greiner's GRB database
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRBs GRB designation (NNNNNNA)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 16 I2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 25 F4.1 arcmin DEm [0/60] Declination (J2000)
27- 33 F7.5 --- z Redshift (spectroscopic or photometric)
35- 46 A12 --- Inst Instruments (1)
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Note (1): Instruments informations as follows:
AGILE = http://agile.rm.iasf.cnr.it
BAT = http://www.batse.msfc.nasa.gov/batse/
Fermi = http://fermi.gsfc.nasa.gov
HETE = http://space.mit.edu/HETE/
INTEGRAL = http://sci.esa.int/integral/
IPN = http://www.ssl.berkeley.edu/ipn3/index.html
RXTE = http://heasarc.gsfc.nasa.gov/docs/xte/xte_1_st.html
SAX = http://www.asdc.asi.it/bepposax/
Swift = http://swift.gsfc.nasa.gov
Uly = http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1990-090B
MAXI = MAXI/GSC nova alert system
RXTE/ASM = http://xte.mit.edu/grb
iPTF = Intermediate Palomar Transient Factory survey
SHOALS = Swift Gamma-Ray Burst Host Galaxy Legacy Survey
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Acknowledgements:
Ming-Hua Li, limh(at)ihep.ac.cn
Institute of Astronomy and Space Sciences, Sun Yat-Sen University
No. 135, Xingangxi Road, Haizhu District,
510275 Guangzhou, P. R. China
Hai-Nan Lin, linhn(at)ihep.ac.cn
Chongqing University No. 174, Shazheng Street, Shapingba District,
400044, Chongqing, P. R. China
(End) M.-H. Li [SYSU], H.-N. Lin [CQU], Patricia Vannier [CDS] 31-Aug-2015