FRB 20220308D
One-off burst
- Event ID
- 214774539
- Arrival, 400 MHz
- 2022-03-08 15:45:45.704 UTC
- Right ascension
- 281.499°
- Declination
- 59.533°
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 | 59646.656778855395 | 59646.656778979996 |
| Arrival time, infinite frequencyMJD | 59646.656671303695 | 59646.656671428296 |
| Width (fitburst)s | 0.001854 | 0.003298 |
| Peak frequencyMHz | 456.0 | 422.5 |
| Lowest frequencyMHz | 415.6 | 400.2 |
| Highest frequencyMHz | 500.4 | 468.9 |
| Spectral index | 69.65 | 23.03 |
| Spectral running | -266.78 | -212.38 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 281.499± 0.175degrees
dec- 59.533± 0.085degrees
gl- 89.29degrees
gb- 23.81degrees
Detection and dispersion
bonsai_snr- 23.6
snr_fitb- 45.4
bonsai_dm- 359.9pc cm⁻³
dm_fitb- 358.6675± 0.05978pc cm⁻³
dm_exc_ne2001- 300.6pc cm⁻³
dm_exc_ymw16- 304.7pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59646.656778979996± 2.55 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.- 59646.656671428296± 1.81 × 10⁻⁸MJD
Burst shape
bc_width- 0.02064s
width_fitbDiffers between sub-bursts.- 0.003298± 0.0001385s
scat_time- 0.000000s
Flux and spectrum
flux- 0.66± 0.19Jy
fluence- 9.65± 2.30Jy ms
peak_freqDiffers between sub-bursts.- 422.5MHz
low_freqDiffers between sub-bursts.- 400.2MHz
high_freqDiffers between sub-bursts.- 468.9MHz
sp_idxDiffers between sub-bursts.- 23.03± 3.35
sp_runDiffers between sub-bursts.- -212.38± 24.50
Exposure and fluence thresholds
exp_up- 161.04± 83.74hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- 3.6Jy ms
low_ft_95- —
up_ft_95- 6.0Jy ms
Fit quality
chi_sq- 1991832.423
dof- 1993885
flag_frac- 0.249