FRB 20221231B
A burst from FRB20220912A
- Repeater
- FRB20220912A
- Event ID
- 259134311
- Arrival, 400 MHz
- 2022-12-31 00:36:33.869 UTC
- Right ascension
- 347.462°
- Declination
- 48.796°
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 | 59944.025391745214 | 59944.025392006326 |
| Arrival time, infinite frequencyMJD | 59944.025325744165 | 59944.025326005285 |
| Width (fitburst)s | 0.002520 | 0.001568 |
| Peak frequencyMHz | 450.4 | 500.7 |
| Lowest frequencyMHz | 411.3 | 447.2 |
| Highest frequencyMHz | 493.1 | 560.7 |
| Spectral index | 66.07 | 80.77 |
| Spectral running | -279.69 | -180.15 |
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Position
ra- 347.462± 0.207degrees
dec- 48.796± 0.204degrees
gl- 106.22degrees
gb- -10.75degrees
Detection and dispersion
bonsai_snr- 15.3
snr_fitb- 40.9
bonsai_dm- 222.4pc cm⁻³
dm_fitb- 220.1028± 0.10786pc cm⁻³
dm_exc_ne2001- 94.4pc cm⁻³
dm_exc_ymw16- 97.2pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59944.025392006326± 1.28 × 10⁻⁸MJD
mjd_infDiffers between sub-bursts.- 59944.025326005285± 3.48 × 10⁻⁸MJD
Burst shape
bc_width- 0.05308s
width_fitbDiffers between sub-bursts.- 0.001568± 0.0003418s
scat_time- 0.007423± 0.0007762s
Flux and spectrum
flux- 1.06± 0.73Jy
fluence- 7.77± 3.77Jy ms
peak_freqDiffers between sub-bursts.- 500.7MHz
low_freqDiffers between sub-bursts.- 447.2MHz
high_freqDiffers between sub-bursts.- 560.7MHz
sp_idxDiffers between sub-bursts.- 80.77± 13.01
sp_runDiffers between sub-bursts.- -180.15± 28.20
Exposure and fluence thresholds
exp_up- 116.31± 65.58hour
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- 1927264.808
dof- 1928922
flag_frac- 0.273