FRB 20221231C

A burst from FRB20220912A

Repeater: FRB20220912A
Event ID: 259137541
Arrival, 400 MHz: 2022-12-31 00:49:10.189 UTC

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	59944.034145711084	59944.03414595417	59944.03414602358
Arrival time, infinite frequencyMJD	59944.03407976088	59944.03408000396	59944.03408007338
Width (fitburst)s	0.000907	0.002111	0.001061
Peak frequencyMHz	697.0	500.5	456.8
Lowest frequencyMHz	658.7	400.2	419.0
Highest frequencyMHz	737.6	644.0	498.2
Spectral index	797.57	16.24	81.26
Spectral running	-718.66	-36.28	-306.82

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Waterfall

Notes

This event was detected in the sidelobes of the CHIME primary beam.
The pulse emission region was extended during fluence estimation.
Localization. Localization not available for sidelobe events.
Exposure. Exposure not available for sidelobe events.
Flux and fluence. Flux and fluence not available for sidelobe events.

Position

ra: —
dec: —
gl: —
gb: —

Detection and dispersion

bonsai_snr: 20.6
snr_fitb: 51.3
bonsai_dm: 222.4pc cm⁻³
dm_fitb: 219.9333± 0.03854pc cm⁻³
dm_exc_ne2001: 105.3pc cm⁻³
dm_exc_ymw16: 107.2pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.: 59944.034145711084± 7.75 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.: 59944.03407976088± 1.39 × 10⁻⁸MJD

Burst shape

bc_width: 0.03146s
width_fitbDiffers between sub-bursts.: 0.000907± 0.0000367s
scat_time: 0.000000s

Flux and spectrum

flux: —
fluence: —
peak_freqDiffers between sub-bursts.: 697.0MHz
low_freqDiffers between sub-bursts.: 658.7MHz
high_freqDiffers between sub-bursts.: 737.6MHz
sp_idxDiffers between sub-bursts.: 797.57± 85.14
sp_runDiffers between sub-bursts.: -718.66± 77.40

Exposure and fluence thresholds

exp_up: —
exp_low: —
low_ft_68: —
up_ft_68: —
low_ft_95: —
up_ft_95: —

Fit quality

chi_sq: 1954164.014
dof: 1956782
flag_frac: 0.263