FRB 20220118A
One-off burst
- Event ID
- 207566461
- Arrival, 400 MHz
- 2022-01-18 18:52:13.149 UTC
- Right ascension
- 280.508°
- Declination
- 55.513°
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 | 59597.7862632677 | 59597.786263298134 |
| Arrival time, infinite frequencyMJD | 59597.78616477839 | 59597.78616480883 |
| Width (fitburst)s | 0.000208 | 0.002685 |
| Peak frequencyMHz | 469.4 | 558.1 |
| Highest frequencyMHz | 777.9 | 800.2 |
| Spectral index | 2.88 | 11.49 |
| Spectral running | -9.02 | -17.28 |
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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 during a system upgrade (hardware or software) and should be excluded from population studies.
Position
ra- 280.508± 0.017degrees
dec- 55.513± 0.104degrees
gl- 84.89degrees
gb- 23.36degrees
Detection and dispersion
bonsai_snr- 43.0
snr_fitb- 60.5
bonsai_dm- 327.9pc cm⁻³
dm_fitb- 328.4459± 0.00167pc cm⁻³
dm_exc_ne2001- 269.5pc cm⁻³
dm_exc_ymw16- 274.3pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59597.786263298134± 2.15 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.- 59597.78616480883± 2.21 × 10⁻⁹MJD
Burst shape
bc_width- 0.00295s
width_fitbDiffers between sub-bursts.- 0.002685± 0.0000723s
scat_time- 0.001015± 0.0000340s
Flux and spectrum
flux- 2.41± 0.87Jy
fluence- 11.38± 4.09Jy ms
peak_freqDiffers between sub-bursts.- 558.1MHz
low_freq- 400.2MHz
high_freqDiffers between sub-bursts.- 800.2MHz
sp_idxDiffers between sub-bursts.- 11.49± 2.24
sp_runDiffers between sub-bursts.- -17.28± 2.93
Exposure and fluence thresholds
exp_up- 188.85± 28.93hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- 3.3Jy ms
low_ft_95- —
up_ft_95- 5.8Jy ms
Fit quality
chi_sq- 1872301.179
dof- 1875948
flag_frac- 0.293