FRB 20221108A
One-off burst
- Event ID
- 251261351
- Arrival, 400 MHz
- 2022-11-08 11:10:50.608 UTC
- Right ascension
- 95.224°
- Declination
- 53.987°
How the sub-bursts differ
This burst has 2 sub-bursts. These 7 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 | 59891.465863487494 | 59891.46586352153 |
| Arrival time, infinite frequencyMJD | 59891.46574266697 | 59891.46574270101 |
| Width (fitburst)s | 0.000308 | 0.000699 |
| Peak frequencyMHz | 400.2 | 425.0 |
| Highest frequencyMHz | 764.2 | 716.0 |
| Spectral index | -0.10 | 1.02 |
| Spectral running | -5.34 | -8.46 |
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Notes
- This event should be excluded from parameter inference due to non-nominal telescope operation.
- The pulse emission region was extended during fluence estimation.
- Exposure. Event occurred on a day with low sensitivity - identified via pulsar-based monitoring of system noise - and should be excluded from population studies.
Position
ra- 95.224± 0.176degrees
dec- 53.987± 0.170degrees
gl- 160.58degrees
gb- 17.42degrees
Detection and dispersion
bonsai_snr- 27.6
snr_fitb- 36.1
bonsai_dm- 402.4pc cm⁻³
dm_fitb- 402.9169± 0.00436pc cm⁻³
dm_exc_ne2001- 316.1pc cm⁻³
dm_exc_ymw16- 296.5pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59891.46586352153± 4.77 × 10⁻¹⁰MJD
mjd_infDiffers between sub-bursts.- 59891.46574270101± 1.39 × 10⁻⁹MJD
Burst shape
bc_width- 0.00295s
width_fitbDiffers between sub-bursts.- 0.000699± 0.0000235s
scat_time- 0.000000s
Flux and spectrum
flux- 0.87± 0.34Jy
fluence- 2.49± 0.85Jy ms
peak_freqDiffers between sub-bursts.- 425.0MHz
low_freq- 400.2MHz
high_freqDiffers between sub-bursts.- 716.0MHz
sp_idxDiffers between sub-bursts.- 1.02± 0.85
sp_runDiffers between sub-bursts.- -8.46± 2.05
Exposure and fluence thresholds
exp_up- 149.61± 64.01hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- 1.0Jy ms
low_ft_95- —
up_ft_95- 1.8Jy ms
Fit quality
chi_sq- 1982708.563
dof- 1984003
flag_frac- 0.253