J/ApJS/257/59 First CHIME/FRB Fast Radio Burst Catalog (CHIME/FRB Col.+, 2021)
The First CHIME/FRB Fast Radio Burst Catalog.
CHIME/FRB Col., Amiri M., Andersen B.C., Bandura K., Berger S., Bhardwaj M.,
Boyce M.M., Boyle P.J., Brar C., Breitman D., Cassanelli T., Chawla P.,
Chen T., Cliche J.-F., Cook A., Cubranic D., Curtin A.P., Deng M., Dobbs M.,
Dong F., Eadie G., Fandino M., Fonseca E., Gaensler B.M., Giri U.,
Good D.C., Halpern M., Hill A.S., Hinshaw G., Josephy A., Kaczmarek J.F.,
Kader Z., Kania J.W., Kaspi V.M., Landecker T.L., Lang D., Leung C., Li D.,
Lin H.-H., Masui K.W., Mckinven R., Mena-Parra J., Merryfield M.,
Meyers B.W., Michilli D., Milutinovic N., Mirhosseini A., Munchmeyer M.,
Naidu A., Newburgh L., Ng C., Patel C., Pen U.-L., Petroff E.,
Pinsonneault-Marotte T., Pleunis Z., Rafiei-Ravandi M., Rahman M.,
Ransom S.M., Renard A., Sanghavi P., Scholz P., Shaw J.R., Shin K.,
Siegel S.R., Sikora A.E., Singh S., Smith K.M., Stairs I., Tan C.M.,
Tendulkar S.P., Vanderlinde K., Wang H., Wulf D., Zwaniga A.V.
<Astrophys. J. Suppl. Ser., 257, 59 (2021)>
=2021ApJS..257...59C 2021ApJS..257...59C
ADC_Keywords: Radio sources
Keywords: Radio transient sources ; Magnetars ; Neutron stars
Abstract:
We present a catalog of 536 fast radio bursts (FRBs) detected by the
Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst
(CHIME/FRB) Project between 400 and 800MHz from 2018 July 25 to
2019 July 1, including 62 bursts from 18 previously reported repeating
sources. The catalog represents the first large sample, including
bursts from repeaters and nonrepeaters, observed in a single survey
with uniform selection effects. This facilitates comparative and
absolute studies of the FRB population. We show that repeaters and
apparent nonrepeaters have sky locations and dispersion measures (DMs)
that are consistent with being drawn from the same distribution.
However, bursts from repeating sources differ from apparent
nonrepeaters in intrinsic temporal width and spectral bandwidth.
Through injection of simulated events into our detection pipeline, we
perform an absolute calibration of selection effects to account for
systematic biases. We find evidence for a population of FRBs-composing
a large fraction of the overall population-with a scattering time at
600MHz in excess of 10ms, of which only a small fraction are observed
by CHIME/FRB. We infer a power-law index for the cumulative fluence
distribution of α=-1.40±0.11(stat.)-0.09+0.06(sys.),
consistent with the -3/2 expectation for a nonevolving population in
Euclidean space. We find that α is steeper for high-DM events
and shallower for low-DM events, which is what would be expected when
DM is correlated with distance. We infer a sky rate of
[820±60(stat.)-200+220(sys.)]/sky/day above a fluence of 5Jy.ms
at 600MHz, with a scattering time at 600MHz under 10ms and DM above
100pc/cm3.
Description:
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope
is located on the grounds of the Dominion Radio Astrophysical
Observatory (DRAO) near Penticton, British Columbia, Canada, and
consists of four 20x100m cylindrical paraboloid reflectors oriented N-S,
with each cylinder axis populated by 256 equispaced
dual-linear-polarization antennas sensitive in the frequency range
400-800MHz. The CHIME/FRB detector views the entire sky north of decl.
-11° every day as it transits overhead. See section 2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 434 600 CHIME/FRB Catalog 1
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See also:
J/other/PASA/33.45 : FRBCAT: The Fast Radio Burst (FRB) Cat. (Petroff+, 2016)
J/ApJ/846/44 : Luminous persistent sources in nearby galaxies (Ofek, 2017)
J/ApJ/896/L2 : ZTF observations of FRB 180916.J0158+65 (Andreoni+, 2020)
J/ApJ/901/134 : Foreground galaxies toward FRB 190608 from SDSS (Simha+, 2020)
http://www.wis-tns.org/ : Transient Name Server (TNS) home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name TNS name (tns_name)
14- 28 A15 --- OName Previous name (previous_name)
30- 41 A12 --- RpName Associated repeater name if any or "-9999"
(repeater_name)
43- 53 F11.7 deg RAdeg Right ascension (J2000)
55- 60 E6.3 deg e_RAdeg [4e-07/0.4] Right ascension error;
see Section 3.2 (ra_err)
62 A1 --- n_RAdeg Notes on right ascension (ra_notes) (1)
64- 73 F10.7 deg DEdeg [-6.5/89.4] Declination (J2000)
75- 79 E5.3 deg e_DEdeg [6e-07/0.5] Declination error;
see Section 3.2 (dec_err)
81 A1 --- n_DEdeg Notes on declination (dec_notes) (1)
83- 88 F6.2 deg GLON [16.3/360] Galactic longitude (gl)
90- 95 F6.2 deg GLAT [-68/89.6] Galactic latitude (gb)
97-103 F7.2 h ExpUp [1.8/1190] Exposure for upper transit of
the source (exp_up)
105-109 F5.1 h e_ExpUp [/330]?=0 Exposure error for upper transit
of the source (expuperr)
111 A1 --- n_ExpUp Notes on exposure for upper transit of
the source (expupnotes) (1)
113-119 F7.1 h ExpLo [8/960]?=-9999 Exposure for lower transit
of the source (exp_low)
121-127 F7.1 h e_ExpLo [1.8/390]?=-9999 Exposure error for
lower transit of the source (explowerr)
129 A1 --- n_ExpLo Notes on exposure for lower transit of
the source (explownotes) (1)
131-135 F5.1 --- SNR [9/134] Detection SNR (bonsai_snr)
137-142 F6.1 pc/cm3 DM [101.9/3038] Detection dispersion measure,
DM (bonsai_dm)
144-148 F5.1 Jy.ms b_Ft68 [0/204] Lower limit fluence threshold
(68% confidence) (lowft68)
150-153 F4.1 Jy.ms B_Ft68 [0/35] Upper limit fluence threshold
(68% confidence) (upft68)
155-159 F5.1 Jy.ms b_Ft95 [0/401.5] Lower limit fluence threshold
(95% confidence) (lowft95)
161-164 F4.1 Jy.ms B_Ft95 [0/63] Upper limit fluence threshold
(95% confidence) (upft95)
166-170 F5.1 --- SNRfitb [7.9/458.5] SNR determined using the
fitting algorithm fitburst (snr_fitb)
172-181 F10.5 pc/cm3 DMfitb [103/3039] DM determined using the
fitting algorithm fitburst (dm_fitb) (2)
183-189 F7.5 pc/cm3 e_DMfitb [0.00016/0.8] DM error determined using
the fitting algorithm fitburst
(dmfitberr) (2)
191-196 F6.1 pc/cm3 DMeNE2001 [62/3007] DM excess between DM
determined by fitburst + NE2001
(dmexcne2001) (3)
198-203 F6.1 pc/cm3 DMeYMW16 [23.9/3016] DM excess between DM
determined by fitburst + YMW16
(dmexcymw16) (3)
205-211 F7.5 s BcWidth [0.00098/0.13] Boxcar width of the pulse
(bc_width)
213 A1 --- l_Scat Limit flag on scat_time
214-223 F10.8 s Scat [0.0001/0.091] Scattering time at 600MHz
(scat_time) (2)
225-238 F14.8 s e_Scat [6.5e-7/0.007]?=-9999 Scattering time
error (scattimeerr) (2)
240-245 F6.3 Jy Flux [0/41] Peak flux of the band-average
profile (lower limit)
247-252 F6.3 Jy e_Flux [0/18] Flux error (flux_err)
254 A1 --- l_Flux Lower bound on Flux (flux_notes) (1)
256-260 F5.2 Jy.ms Fluence [0/95] Fluence (lower limit)
262-266 F5.2 Jy.ms e_Fluence [0/41] Fluence error (fluence_err)
268 A1 --- l_Fluence Lower bound on Fluence (fluence_notes) (1)
270 I1 --- Nsb [0/5] Sub-burst number (sub_num) (4)
272-288 F17.11 d MJD400 [58324.7/58666] Time of arrival with
reference to 400.1953125MHz;
Modified Julian Date (mjd_400) (5)
290-302 F13.11 d e_MJD400 [1.7e-10/1.4] Error on MJD400
(mjd400err) (5)
304-320 F17.11 d MJDinf [58324.7/58666] Time of arrival with
reference to infinite frequency
(mjd_inf) (5)
322-334 F13.11 d e_MJDinf [1.9e-10/1.4] Time of arrival error with
reference to infinite frequency
(mjdinferr) (5)
336 A1 --- l_Widthfitb Limit flag on width_fitb
337-345 F9.7 s Widthfitb [0.0001/0.03] Width of sub-burst using
fitburst (width_fitb)
347-359 F13.7 s e_Widthfitb [2.3e-06/0.007]?=-9999 Width error of
sub-burst using fitburst (widthfitberr)
361-366 F6.3 --- SpInd [-9.4/99] Spectral index for the
sub-burst (sp_idx)
368-373 F6.3 --- e_SpInd [0.078/26] Spectral index error for the
sub-burst (spidxerr)
375-381 F7.2 --- spRun [-910/10.3] Spectral running for the
sub-burst (sp_run)
383-388 F6.2 --- e_spRun [0.13/170] Spectral running error for
the sub-burst (sprunerr)
390-394 F5.1 MHz B_Freq [444.1/800.2] Highest frequency band of
detection for the sub-burst at FWTM
(high_freq)
396-400 F5.1 MHz b_Freq [400.2/658.6] Lowest frequency band of
detection for the sub-burst at FWTM
(low_freq)
402-406 F5.1 MHz Fpk [400.2/800.2] Peak frequency for the
sub-burst (peak_freq)
408-418 F11.3 --- chi2 [136752/9092629] Fit χ^2 from
fitburst (chi_sq)
420-426 I7 --- dof [134058/9070841] Number of deg of
freedom in fitburst
428-432 F5.3 --- Frac [0.232/0.657] Fraction of spectral
channels flagged in fitburst (flag_frac)
434 I1 --- Flag [0/1] Flag (excluded_flag) (6)
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Note (1): Note as follows:
f = Burst detected in the far sidelobes of CHIME.
c = RA/DEC from Chaterjee et al. (2017Natur.541...58C 2017Natur.541...58C)
l = A significant fraction of the localization region of the burst is
falling between the FWHM of two beams resulting in a large error on
the exposure. See Section 2.2.
m = RA/DEC from Marcote et al. (2020Natur.577..190M 2020Natur.577..190M)
n = No error on exposure due to precise position. See Section 2.2.
< = Extreme lower bound due to the event being detected in the far sidelobes.
Note (2): All statistically significant fitburst parameters (i.e., with
parameter value v and uncertainty σ such that v/σ>3) have
their best-fit value and 1σ uncertainty reported; for marginal
estimates, we report the 2σ upper limit obtained from fitburst.
Note (3): Assuming the best-fit sky position of the source.
Note (4): If the FRB has only one burst, then the sub-burst number is 0.
Sub-bursts listed in chronological order.
Note (5): For the specific sub-burst.
Note (6): Flag for events excluded from parameter inference due to
non-nominal telescope operation: 1=excluded (42 occurrences),
0=included (558 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Mar-2022