FRB 20221221B
A burst from FRB20220912A
- Repeater
- FRB20220912A
- Event ID
- 256585020
- Arrival, 400 MHz
- 2022-12-21 01:09:16.767 UTC
- Right ascension
- 347.292°
- Declination
- 48.805°
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.
| Measurement | Sub-burst 1 | Sub-burst 2 | Sub-burst 3 | Sub-burst 4 |
|---|---|---|---|---|
| Arrival time, 400 MHzMJD | 59934.048110599746 | 59934.04811073045 | 59934.04811092017 | 59934.04811104538 |
| Arrival time, infinite frequencyMJD | 59934.04804454791 | 59934.04804467862 | 59934.048044868345 | 59934.04804499355 |
| Width (fitburst)s | 0.003719 | 0.006294 | 0.009313 | 0.001339 |
| Peak frequencyMHz | 489.3 | 476.3 | 461.7 | 438.9 |
| Lowest frequencyMHz | 448.7 | 438.0 | 424.5 | 416.0 |
| Highest frequencyMHz | 533.6 | 517.9 | 502.2 | 463.1 |
| Spectral index | 123.12 | 114.00 | 93.15 | 147.85 |
| Spectral running | -306.21 | -327.49 | -325.84 | -800.82 |
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Position
ra- 347.292± 0.029degrees
dec- 48.805± 0.179degrees
gl- 106.12degrees
gb- -10.70degrees
Detection and dispersion
bonsai_snr- 16.6
snr_fitb- 39.2
bonsai_dm- 224.8pc cm⁻³
dm_fitb- 220.2722± 0.29972pc cm⁻³
dm_exc_ne2001- 94.0pc cm⁻³
dm_exc_ymw16- 96.9pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59934.04811073045± 3.58 × 10⁻⁸MJD
mjd_infDiffers between sub-bursts.- 59934.04804467862± 9.67 × 10⁻⁸MJD
Burst shape
bc_width- 0.04424s
width_fitbDiffers between sub-bursts.- 0.006294± 0.0023538s
scat_time- 0.000000s
Flux and spectrum
flux- 0.48± 0.29Jy
fluence- 10.70± 4.24Jy ms
peak_freqDiffers between sub-bursts.- 476.3MHz
low_freqDiffers between sub-bursts.- 438.0MHz
high_freqDiffers between sub-bursts.- 517.9MHz
sp_idxDiffers between sub-bursts.- 114.00± 27.68
sp_runDiffers between sub-bursts.- -327.49± 75.45
Exposure and fluence thresholds
exp_up- 128.97± 58.87hour
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- 1901642.454
dof- 1903155
flag_frac- 0.283