FRB 20181128A

A burst from FRB20181128A

Previous name: 181128.J0456+63
Repeater: FRB20181128A
Arrival, 400 MHz: 2018-11-28 08:27:41.629 UTC
Right ascension: 73.920°
Declination: 63.220°

How the sub-bursts differ

This burst has 2 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
Arrival time, 400 MHzMJD	58450.352565036	58450.352565152
Arrival time, infinite frequencyMJD	58450.3524299823	58450.3524300983
Width (fitburst)s	0.001020	0.001820
Peak frequencyMHz	618.9	481.5
Lowest frequencyMHz	520.7	400.2
Highest frequencyMHz	735.5	610.4
Spectral index	67.30	15.10
Spectral running	-77.00	-40.90

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Localization

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Waterfall

Notes

Upper transit exposure. 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.

Position

ra: 73.920± 0.140degrees
dec: 63.220± 0.073degrees
gl: 146.73degrees
gb: 12.30degrees

Detection and dispersion

bonsai_snr: 23.4
snr_fitb: 35.7
bonsai_dm: 446.4pc cm⁻³
dm_fitb: 450.3823± 0.00920pc cm⁻³
dm_exc_ne2001: 338.0pc cm⁻³
dm_exc_ymw16: 298.4pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.: 58450.352565152± 8.50 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.: 58450.3524300983± 8.90 × 10⁻⁹MJD

Burst shape

bc_width: 0.02163s
width_fitbDiffers between sub-bursts.: 0.001820± 0.0003600s
scat_time: 0.003990± 0.0005000s

Flux and spectrum

flux: 0.64± 0.37Jy
fluence: 8.10± 3.80Jy ms
peak_freqDiffers between sub-bursts.: 481.5MHz
low_freqDiffers between sub-bursts.: 400.2MHz
high_freqDiffers between sub-bursts.: 610.4MHz
sp_idxDiffers between sub-bursts.: 15.10± 2.70
sp_runDiffers between sub-bursts.: -40.90± 6.90

Exposure and fluence thresholds

exp_up: 13.00± 13.00hour
exp_low: —
low_ft_68: 0.0Jy ms
up_ft_68: 5.9Jy ms
low_ft_95: 0.0Jy ms
up_ft_95: 25.6Jy ms

Fit quality

chi_sq: 800131.220
dof: 796468
flag_frac: 0.360