2024ApJ...975...75L

Query : 2024ApJ...975...75L

2024ApJ...975...75L - Astrophys. J., 975, 75 (2024/November-1)

Do All Fast Radio Bursts Repeat? Constraints from CHIME/FRB Far Sidelobe FRBs.

LIN H.-H., SCHOLZ P., NG C., PEN U.-L., BHARDWAJ M., CHAWLA P., CURTIN A.P., LI D., NEWBURGH L., REDA A., SAND K.R., TENDULKAR S.P., ANDERSEN B., BANDURA K., BRAR C., CASSANELLI T., COOK A.M., DOBBS M., DONG F.A., EADIE G., FONSECA E., GAENSLER B.M., GIRI U., HERRERA-MARTIN A., HILL A.S., KACZMAREK J., KANIA J., KASPI V., KHAIRY K., LANMAN A.E., LEUNG C., MASUI K.W., MENA-PARRA J., MEYERS B.W., MICHILLI D., MILUTINOVIC N., ORDOG A., PEARLMAN A.B., PLEUNIS Z., RAFIEI-RAVANDI M., RAHMAN M., RANSOM S., SANGHAVI P., SHIN K., SMITH K., STAIRS I., STENNING D.C., VANDERLINDE K. and WULF D.

Abstract (from CDS):

We report 10 fast radio bursts (FRBs) detected in the far sidelobe region (i.e., ≥5° off-meridian) of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) from August 28 2018 to August 31 2021. We localize the bursts by fitting their spectra with a model of the CHIME/FRB synthesized beam response. We find that the far sidelobe events have on average ∼500 times greater fluxes than events detected in CHIME's main lobe. We show that the sidelobe sample is therefore statistically ∼20 times closer than the main lobe sample. We find promising host galaxy candidates (Pcc < 1%) for two of the FRBs, 20190112B and 20210310B, at distances of 38 and 16 Mpc, respectively. CHIME/FRB did not observe repetition of similar brightness from the uniform sample of 10 sidelobe FRBs in a total exposure time of 35,580 hr. Under the assumption of Poisson-distributed bursts, we infer that the mean repetition interval above the detection threshold of the far sidelobe events is longer than 11,880 hr, which is at least 2380 times larger than the interval from known CHIME/FRB detected repeating sources, with some caveats, notably that very narrowband events could have been missed. Our results from these far sidelobe events suggest one of two scenarios: either (1) all FRBs repeat and the repetition intervals span a wide range, with high-rate repeaters being a rare sub-population, or (2) non-repeating FRBs are a distinct population different from known repeaters.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): High energy astrophysics - Radio transient sources - Radio bursts - Neutron stars - Time domain astronomy - Extragalactic astronomy

Simbad objects: 29

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Number of rows : 29
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 FRB 20191104B rB 01 20 37.0 +26 42 05           ~ 1 0
2 FRB 110214 rB 01 21 17.0 -49 47 11           ~ 24 0
3 FRB 20201105A rB 02 42 18.0 +14 23 13           ~ 4 0
4 PSR B0329+54 Psr 03 32 59.3370698592 +54 34 45.028206408           ~ 690 1
5 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
6 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
7 FRB 20190202B rB 07 37 16.8000 +32 27 00.000           ~ 11 0
8 FRB 20201129A rB 07 52 17.0 +53 16 55           ~ 1 0
9 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
10 FRB 20200120E rB 09 57 56.7 +68 49 32           ~ 219 0
11 NGC 5273 Sy1 13 42 08.3801616672 +35 39 15.467518836   14.01 13.12     ~ 510 0
12 FRB 20210310B rB 13 42 21.0 +35 33 46           ~ 1 0
13 NGC 5276 G 13 42 21.9925919808 +35 37 26.757097932   14.6       ~ 33 0
14 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
15 FRB 20190125B rB 14 29 48.0 +49 37 54           ~ 11 0
16 NGC 5660 GiG 14 29 49.8189307200 +49 37 21.609211800   12.2       ~ 127 1
17 FRB 20210810A rB 15 17 55.0 +32 09 24           ~ 1 0
18 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
19 PSO J297.5975+70.8550 G 19 50 23.41752000 +70 51 18.2295000           ~ 1 0
20 PSO J297.6873+70.8567 G 19 50 44.96434320 +70 51 24.3013320           ~ 1 0
21 FRB 20191202A rB 19 51 56.0 +70 49 07           ~ 1 0
22 PSO J298.0218+70.7712 G 19 52 05.23261920 +70 46 16.5759240           ~ 1 0
23 PSO J298.1829+70.8063 G 19 52 43.90881360 +70 48 22.6857600           ~ 1 0
24 PSR J1955+6708 Psr 19 55 38.764 +67 08 15.10           ~ 4 0
25 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
26 PSR J2043+7045 Psr 20 43.0 +70 45           ~ 6 0
27 FRB 20191219E rB 21 18 30.0 +55 50 48           ~ 1 0
28 FRB 20190210D rB 22 17 58.0 +52 53 20           ~ 11 0
29 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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