J/A+A/698/A18 Selected CHIME FRB sample (Zhang+, 2025)
Revisiting the energy distribution and formation rate of CHIME fast radio
bursts.
Zhang K.J., Zhang Z.B., Rodin A.E., Fedorova V.A., Huang Y.F., Li D.,
Dong X.F., Wang P., Li Q.M., Du C., Xu F., Hao C.T.
<Astron. Astrophys. 698, A18 (2025)>
=2025A&A...698A..18Z 2025A&A...698A..18Z (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Redshifts
Keywords: stars: formation - stars: late-type - pulsars: general -
methods: data analysis
Abstract:
Based on the first CHIME/FRB catalog, three volume-limited samples of
fast radio bursts (FRBs) are built, with Sample 1, 2 and 3
corresponding to a fluence cut of 5, 3 and 1, respectively. The
Lynden-Bell's c- method is applied to study their energy function
and event rate evolution with redshift (z). Using the non-parametric
Kendell's τ statistics, it is found that the FRB energy (E)
strongly evolves with redshift as E(z)∝(1+z)1.24 for Sample
1, E(z)∝(1+z)0.98 for Sample 2 and E(z)∝(1+z)1.99
for Sample 3. After removing the redshift dependence, the local energy
distributions of the three samples can be well described by a broken
power-law form with a broken energy of ∼1040 erg. Meanwhile, the
redshift distributions of Samples 1 and 2 are identical but different
from that of Sample 3. Interestingly, we find that the event rates of
Samples 1 and 2 of are independent of redshift, and Sample 3 decreases
as a single power-law form with an index of -2.41. The local event
rates of the three samples of CHIME FRBs are found to be consistently
close to ∼104Gpc-3yr-1, which is comparable with some previous
estimates. In addition, we notice the event rate of Sample 3 FRBs with
lower energies not only exceeds the star formation rate at the lower
redshifts but also always declines with the increase of redshift. We
suggest that the excess of FRB rates as compared with the star
formation rate at low redshift is mainly resulted from the low energy
FRBs that could originate from the older stellar populations.
Description:
We have applied the non-parametric method to investigate the energy
function and formation rate of three volume-limited samples of CHIME
FRBs.
The catalog contains properties of FRBs detected by CHIME, including:
- TNS names and basic parameters - Dispersion measures (DM) with IGM
contribution - Redshift estimates with asymmetric uncertainties -
Fluence measurements with errors - Energy estimates with uncertainties
- Quality flags and repeat burst identification The data is divided
into three volume-limited samples based on fluence cuts: -
Sample 1: F>5Jy.ms - Sample 2: F>3Jy.ms - Sample 3: F>1Jy.ms.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 99 366 The selected CHIME FRB sample
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See also:
J/ApJS/253/10 : 12yrs of R-band photometry of quasar 3C 454.3 (Fan+, 2021)
J/ApJS/257/59 : First CHIME/FRB Fast Radio Burst Catalog
(CHIME/FRB Col, 2021)
J/MNRAS/509/1227 : Hidden repeating fast radio bursts (Chen+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- TNS TNS name
14- 19 F6.1 pc/cm3 DM Dispersion measure
21- 26 F6.1 pc/cm3 DM-E Extragalactic dispersion measure
28- 33 F6.1 pc/cm3 DM-IGM Dispersion measure with IGM contribution
35- 39 F5.3 --- z Redshift estimate
41- 45 F5.3 --- E_z Redshift estimate error (upper value)
47- 51 F5.3 --- e_z Redshift estimate error (lower value)
53- 57 F5.2 Jy.ms Fluence Fluence
59- 63 F5.2 Jy.ms e_Fluence Fluence error
65- 69 F5.1 --- v2 Second central frequency for observation
71- 75 F5.1 --- v1 First central frequency for observation
77- 84 E8.3 10-7W Energy Energy estimate
86- 93 E8.3 10-7W e_Energy Energy estimate error
95 I1 --- Flag [0/1] Quality flag
97- 99 A3 --- Repeat [YES NO] Repeat
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Acknowledgements:
Zhibin Zhang , zbzhang(at)sina.com
References:
Fan et al., 2022ApJS..260...22C 2022ApJS..260...22C Erratum to 2021ApJS..253...10F 2021ApJS..253...10F
Lynden-Bell, 1971MNRAS.155...95L 1971MNRAS.155...95L The estimation of the luminosity function
(End) Patricia Vannier [CDS] 25-Apr-2025