FRB 20220228D
One-off burst
- Event ID
- 213390137
- Arrival, 400 MHz
- 2022-02-28 06:09:06.674 UTC
- Right ascension
- 130.459°
- Declination
- 4.955°
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 | 59638.25632713941 | 59638.2563272416 |
| Arrival time, infinite frequencyMJD | 59638.25624250296 | 59638.25624260515 |
| Width (fitburst)s | 0.001427 | 0.009122 |
| Peak frequencyMHz | 466.1 | 429.3 |
| Lowest frequencyMHz | 435.8 | 401.6 |
| Highest frequencyMHz | 498.4 | 458.9 |
| Spectral index | 155.61 | 72.58 |
| Spectral running | -510.69 | -517.67 |
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Notes
- The pulse emission region was extended during fluence estimation.
- Flux and fluence. Flux/fluence estimate is invalid due to an unphysical negative value likely caused by errors in baseline subtraction or burst window selection.
Position
ra- 130.459± 0.179degrees
dec- 4.955± 0.037degrees
gl- 221.54degrees
gb- 26.75degrees
Detection and dispersion
bonsai_snr- 21.7
snr_fitb- 85.4
bonsai_dm- 283.1pc cm⁻³
dm_fitb- 282.2489± 0.10204pc cm⁻³
dm_exc_ne2001- 223.7pc cm⁻³
dm_exc_ymw16- 225.3pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59638.2563272416± 5.62 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.- 59638.25624260515± 3.11 × 10⁻⁸MJD
Burst shape
bc_width- 0.02654s
width_fitbDiffers between sub-bursts.- 0.009122± 0.0003425s
scat_time- 0.014390± 0.0007266s
Flux and spectrum
flux- —
fluence- —
peak_freqDiffers between sub-bursts.- 429.3MHz
low_freqDiffers between sub-bursts.- 401.6MHz
high_freqDiffers between sub-bursts.- 458.9MHz
sp_idxDiffers between sub-bursts.- 72.58± 4.25
sp_runDiffers between sub-bursts.- -517.67± 30.97
Exposure and fluence thresholds
exp_up- 25.07± 36.80hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- —
low_ft_95- —
up_ft_95- —
Fit quality
chi_sq- 1735499.066
dof- 1742784
flag_frac- 0.343