FRB 20201228A

A burst from FRB20190804E

Repeater: FRB20190804E
Event ID: 149540279
Arrival, 400 MHz: 2020-12-28 18:52:36.322 UTC
Right ascension: 261.099°
Declination: 55.056°

How the sub-bursts differ

This burst has 3 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
Arrival time, 400 MHzMJD	59211.786531332524	59211.7865314088	59211.78653150737
Arrival time, infinite frequencyMJD	59211.78642246465	59211.78642254092	59211.786422639496
Width (fitburst)s	0.001537	0.002940	0.000411
Peak frequencyMHz	595.2	543.5	486.6
Lowest frequencyMHz	533.9	469.5	427.0
Highest frequencyMHz	663.5	629.2	554.6
Spectral index	154.77	65.74	52.65
Spectral running	-194.97	-107.41	-134.65

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Localization

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Waterfall

Notes

The pulse emission region was extended during fluence estimation.

Position

ra: 261.099± 0.173degrees
dec: 55.056± 0.066degrees
gl: 82.88degrees
gb: 34.25degrees

Detection and dispersion

bonsai_snr: 24.8
snr_fitb: 48.7
bonsai_dm: 362.7pc cm⁻³
dm_fitb: 363.0568± 0.01822pc cm⁻³
dm_exc_ne2001: 319.8pc cm⁻³
dm_exc_ymw16: 326.6pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.: 59211.78653150737± 1.93 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.: 59211.786422639496± 5.79 × 10⁻⁹MJD

Burst shape

bc_width: 0.02163s
width_fitbDiffers between sub-bursts.: 0.000411± 0.0000358s
scat_time: 0.003221± 0.0001977s

Flux and spectrum

flux: 0.53± 0.14Jy
fluence: 5.39± 0.73Jy ms
peak_freqDiffers between sub-bursts.: 486.6MHz
low_freqDiffers between sub-bursts.: 427.0MHz
high_freqDiffers between sub-bursts.: 554.6MHz
sp_idxDiffers between sub-bursts.: 52.65± 3.84
sp_runDiffers between sub-bursts.: -134.65± 9.43

Exposure and fluence thresholds

exp_up: 137.10± 70.40hour
exp_low: 0.00± 0.00hour
low_ft_68: 0.0Jy ms
up_ft_68: 2.4Jy ms
low_ft_95: 0.0Jy ms
up_ft_95: 5.1Jy ms

Fit quality

chi_sq: 831155.424
dof: 833511
flag_frac: 0.179