FRB 20220317B
One-off burst
- Event ID
- 216320152
- Arrival, 400 MHz
- 2022-03-17 20:38:49.122 UTC
- Right ascension
- 5.625°
- Declination
- 51.523°
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 | 59655.860290759476 | 59655.860290869125 |
| Arrival time, infinite frequencyMJD | 59655.85991243287 | 59655.85991254252 |
| Width (fitburst)s | 0.001415 | 0.001939 |
| Peak frequencyMHz | 699.6 | 675.8 |
| Lowest frequencyMHz | 639.4 | 615.7 |
| Highest frequencyMHz | 765.4 | 741.8 |
| Spectral index | 317.59 | 277.70 |
| Spectral running | -284.31 | -265.00 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 5.625± 0.073degrees
dec- 51.523± 0.193degrees
gl- 118.35degrees
gb- -11.09degrees
Detection and dispersion
bonsai_snr- 12.8
snr_fitb- 22.6
bonsai_dm- 1263.3pc cm⁻³
dm_fitb- 1261.6581± 0.50026pc cm⁻³
dm_exc_ne2001- 1139.2pc cm⁻³
dm_exc_ymw16- 1134.2pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59655.860290759476± 1.00 × 10⁻⁷MJD
mjd_infDiffers between sub-bursts.- 59655.85991243287± 1.81 × 10⁻⁷MJD
Burst shape
bc_width- 0.02163s
width_fitbDiffers between sub-bursts.- 0.001415± 0.0004015s
scat_time- 0.038123± 0.0078872s
Flux and spectrum
flux- 0.31± 0.14Jy
fluence- 5.72± 1.71Jy ms
peak_freqDiffers between sub-bursts.- 699.6MHz
low_freqDiffers between sub-bursts.- 639.4MHz
high_freqDiffers between sub-bursts.- 765.4MHz
sp_idxDiffers between sub-bursts.- 317.59± 92.43
sp_runDiffers between sub-bursts.- -284.31± 84.03
Exposure and fluence thresholds
exp_up- 131.12± 68.99hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- 6.4Jy ms
low_ft_95- —
up_ft_95- 11.2Jy ms
Fit quality
chi_sq- 1987067.312
dof- 1987566
flag_frac- 0.251