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CHIME/FRBPublic data
Repeater
FRB20220912A
Event ID
245936178
Arrival, 400 MHz
2022-10-12 05:50:53.722 UTC
Right ascension
347.418°
Declination
48.751°

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.

MeasurementSub-burst 1Sub-burst 2Sub-burst 3Sub-burst 4
Arrival time, 400 MHzMJD59864.24367703465459864.24367714774459864.2436772188759864.24367734166
Arrival time, infinite frequencyMJD59864.2436112937859864.2436114068859864.2436114779959864.24361160079
Width (fitburst)s0.0029010.0007350.0008380.007426
Peak frequencyMHz746.9482.0453.7800.2
Lowest frequencyMHz556.1400.2400.2400.2
Highest frequencyMHz800.2597.4578.9800.2
Spectral index33.0118.589.733.96
Spectral running-26.46-49.95-38.75-1.96

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Localization

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Waterfall

Notes

  • The pulse emission region was extended during fluence estimation.

Position

ra
347.418± 0.165degrees
dec
48.751± 0.135degrees
gl
106.17degrees
gb
-10.78degrees

Detection and dispersion

bonsai_snr
29.0
snr_fitb
47.9
bonsai_dm
218.8pc cm⁻³
dm_fitb
219.2352± 0.01919pc cm⁻³
dm_exc_ne2001
93.8pc cm⁻³
dm_exc_ymw16
96.7pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.
59864.24367734166± 9.22 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.
59864.24361160079± 1.09 × 10⁻⁸MJD

Burst shape

bc_width
0.04227s
width_fitbDiffers between sub-bursts.
0.007426± 0.0006252s
scat_time
0.004773± 0.0004823s

Flux and spectrum

flux
1.09± 0.38Jy
fluence
11.46± 3.59Jy ms
peak_freqDiffers between sub-bursts.
800.2MHz
low_freqDiffers between sub-bursts.
400.2MHz
high_freqDiffers between sub-bursts.
800.2MHz
sp_idxDiffers between sub-bursts.
3.96± 2.72
sp_runDiffers between sub-bursts.
-1.96± 2.85

Exposure and fluence thresholds

exp_up
107.28± 68.64hour
exp_low
0.00± 0.00hour
low_ft_68
0.0Jy ms
up_ft_68
2.6Jy ms
low_ft_95
0.0Jy ms
up_ft_95
7.1Jy ms

Fit quality

chi_sq
1077029.753
dof
1079298
flag_frac
0.401