FRB 20221221A
A burst from FRB20220912A
- Repeater
- FRB20220912A
- Event ID
- 256584694
- Arrival, 400 MHz
- 2022-12-21 01:08:11.654 UTC
- Right ascension
- 347.355°
- Declination
- 48.674°
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 | 59934.04735711199 | 59934.04735733499 |
| Arrival time, infinite frequencyMJD | 59934.047290729126 | 59934.04729095212 |
| Width (fitburst)s | 0.004487 | 0.002161 |
| Peak frequencyMHz | 500.7 | 519.0 |
| Lowest frequencyMHz | 441.1 | 456.1 |
| Highest frequencyMHz | 568.2 | 590.5 |
| Spectral index | 64.36 | 71.82 |
| Spectral running | -143.68 | -138.16 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 347.355± 0.157degrees
dec- 48.674± 0.048degrees
gl- 106.10degrees
gb- -10.84degrees
Detection and dispersion
bonsai_snr- 22.4
snr_fitb- 67.3
bonsai_dm- 223.2pc cm⁻³
dm_fitb- 221.3761± 0.10820pc cm⁻³
dm_exc_ne2001- 96.5pc cm⁻³
dm_exc_ymw16- 99.5pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59934.04735711199± 1.26 × 10⁻⁸MJD
mjd_infDiffers between sub-bursts.- 59934.047290729126± 3.48 × 10⁻⁸MJD
Burst shape
bc_width- 0.03146s
width_fitbDiffers between sub-bursts.- 0.004487± 0.0002396s
scat_time- 0.016555± 0.0014064s
Flux and spectrum
flux- 0.77± 0.41Jy
fluence- 13.15± 4.34Jy ms
peak_freqDiffers between sub-bursts.- 500.7MHz
low_freqDiffers between sub-bursts.- 441.1MHz
high_freqDiffers between sub-bursts.- 568.2MHz
sp_idxDiffers between sub-bursts.- 64.36± 3.17
sp_runDiffers between sub-bursts.- -143.68± 6.83
Exposure and fluence thresholds
exp_up- 96.45± 67.11hour
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- 1923114.353
dof- 1927626
flag_frac- 0.274