FRB 20221208A
A burst from FRB20220912A
- Repeater
- FRB20220912A
- Event ID
- 254538643
- Arrival, 400 MHz
- 2022-12-08 01:02:18.240 UTC
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 | 59921.04326649675 | 59921.043266665794 | 59921.04326674297 | 59921.04326682646 |
| Arrival time, infinite frequencyMJD | 59921.043200583474 | 59921.043200752516 | 59921.04320082969 | 59921.04320091319 |
| Width (fitburst)s | 0.002003 | 0.001356 | 0.002282 | 0.000902 |
| Peak frequencyMHz | 508.7 | 505.7 | 506.6 | 506.5 |
| Lowest frequencyMHz | 498.7 | 495.5 | 496.1 | 495.1 |
| Highest frequencyMHz | 518.8 | 516.2 | 517.3 | 518.2 |
| Spectral index | 2824.57 | 2548.22 | 2455.70 | 2091.43 |
| Spectral running | -5888.35 | -5442.62 | -5208.93 | -4438.54 |
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Notes
- This event was detected in the sidelobes of the CHIME primary beam.
- The pulse emission region was extended during fluence estimation.
- Localization. Localization not available for sidelobe events.
- Exposure. Exposure not available for sidelobe events.
- Flux and fluence. Flux and fluence not available for sidelobe events.
Position
ra- —
dec- —
gl- —
gb- —
Detection and dispersion
bonsai_snr- 9.5
snr_fitb- 36.9
bonsai_dm- 218.4pc cm⁻³
dm_fitb- 219.8101± 0.21688pc cm⁻³
dm_exc_ne2001- 14.3pc cm⁻³
dm_exc_ymw16- 13.5pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59921.043266665794± 2.44 × 10⁻⁸MJD
mjd_infDiffers between sub-bursts.- 59921.043200752516± 6.95 × 10⁻⁸MJD
Burst shape
bc_width- 0.02359s
width_fitbDiffers between sub-bursts.- 0.001356± 0.0001023s
scat_time- 0.000000s
Flux and spectrum
flux- —
fluence- —
peak_freqDiffers between sub-bursts.- 505.7MHz
low_freqDiffers between sub-bursts.- 495.5MHz
high_freqDiffers between sub-bursts.- 516.2MHz
sp_idxDiffers between sub-bursts.- 2548.22± 291.85
sp_runDiffers between sub-bursts.- -5442.62± 622.47
Exposure and fluence thresholds
exp_up- —
exp_low- —
low_ft_68- —
up_ft_68- —
low_ft_95- —
up_ft_95- —
Fit quality
chi_sq- 1933886.796
dof- 1935231
flag_frac- 0.271