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CHIME/FRBPublic data
Repeater
FRB20220912A
Event ID
253963472
Arrival, 400 MHz
2022-12-05 02:13:36.069 UTC
Right ascension
347.385°
Declination
48.806°

How the sub-bursts differ

This burst has 2 sub-bursts. These 7 measurements differ between them and are highlighted below. Everything else is the same for every sub-burst.

MeasurementSub-burst 1Sub-burst 2
Arrival time, 400 MHzMJD59918.0927778884659918.092778574784
Arrival time, infinite frequencyMJD59918.0927120832359918.09271276956
Width (fitburst)s0.0105070.001400
Peak frequencyMHz673.7400.2
Lowest frequencyMHz559.1400.2
Spectral index68.98-2.44
Spectral running-66.22-0.79

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Localization

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Waterfall

Position

ra
347.385± 0.195degrees
dec
48.806± 0.194degrees
gl
106.18degrees
gb
-10.72degrees

Detection and dispersion

bonsai_snr
16.6
snr_fitb
28.1
bonsai_dm
224.0pc cm⁻³
dm_fitb
219.4498± 0.04125pc cm⁻³
dm_exc_ne2001
93.4pc cm⁻³
dm_exc_ymw16
96.3pc cm⁻³

Arrival time

mjd_400Differs between sub-bursts.
59918.092778574784± 3.17 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.
59918.09271276956± 1.28 × 10⁻⁸MJD

Burst shape

bc_width
0.07668s
width_fitbDiffers between sub-bursts.
0.001400± 0.0002235s
scat_time
0.000000s

Flux and spectrum

flux
0.58± 0.27Jy
fluence
14.61± 5.83Jy ms
peak_freqDiffers between sub-bursts.
400.2MHz
low_freqDiffers between sub-bursts.
400.2MHz
high_freq
800.2MHz
sp_idxDiffers between sub-bursts.
-2.44± 1.59
sp_runDiffers between sub-bursts.
-0.79± 3.25

Exposure and fluence thresholds

exp_up
120.67± 62.67hour
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
1930249.468
dof
1931029
flag_frac
0.272