FRB 20200318B

One-off burst

Event ID: 77421495
Arrival, 400 MHz: 2020-03-18 05:41:47.865 UTC
Right ascension: 141.215°
Declination: 21.112°

How the sub-bursts differ

This burst has 4 sub-bursts. These 8 measurements differ between them and are highlighted below. Everything else is the same for every sub-burst.

Measurement	Sub-burst 1	Sub-burst 2	Sub-burst 3	Sub-burst 4
Arrival time, 400 MHzMJD	58926.23735948393	58926.23735952305	58926.237359556995	58926.237359544044
Arrival time, infinite frequencyMJD	58926.23727879141	58926.23727883052	58926.23727886447	58926.23727885152
Width (fitburst)s	0.000617	0.000597	0.000827	0.004251
Peak frequencyMHz	550.9	543.6	505.3	583.1
Lowest frequencyMHz	444.1	443.6	435.4	514.6
Highest frequencyMHz	683.4	666.3	586.5	660.7
Spectral index	31.67	34.10	48.39	110.95
Spectral running	-49.55	-55.65	-103.72	-147.40

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Localization

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Waterfall

Notes

The pulse emission region was extended during fluence estimation.

Position

ra: 141.215± 0.039degrees
dec: 21.112± 0.146degrees
gl: 208.51degrees
gb: 42.80degrees

Detection and dispersion

bonsai_snr: 39.0
snr_fitb: 128.7
bonsai_dm: 270.1pc cm⁻³
dm_fitb: 269.0965± 0.00348pc cm⁻³
dm_exc_ne2001: 226.9pc cm⁻³
dm_exc_ymw16: 234.2pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.: 58926.237359544044± 3.01 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.: 58926.23727885152± 3.18 × 10⁻⁹MJD

Burst shape

bc_width: 0.00786s
width_fitbDiffers between sub-bursts.: 0.004251± 0.0001895s
scat_time: 0.000000s

Flux and spectrum

flux: 5.08± 1.10Jy
fluence: 24.94± 4.96Jy ms
peak_freqDiffers between sub-bursts.: 583.1MHz
low_freqDiffers between sub-bursts.: 514.6MHz
high_freqDiffers between sub-bursts.: 660.7MHz
sp_idxDiffers between sub-bursts.: 110.95± 11.23
sp_runDiffers between sub-bursts.: -147.40± 14.14

Exposure and fluence thresholds

exp_up: 96.23± 34.65hour
exp_low: 0.00± 0.00hour
low_ft_68: —
up_ft_68: 8.3Jy ms
low_ft_95: —
up_ft_95: 13.5Jy ms

Fit quality

chi_sq: 796057.851
dof: 812613
flag_frac: 0.200