FRB 20210830B
One-off burst
- Event ID
- 183318898
- Arrival, 400 MHz
- 2021-08-30 22:03:12.346 UTC
- Right ascension
- 189.812°
- Declination
- 25.487°
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 | 59456.91889253156 | 59456.918892888 |
| Arrival time, infinite frequencyMJD | 59456.918660393974 | 59456.918660750416 |
| Width (fitburst)s | 0.004802 | 0.008440 |
| Peak frequencyMHz | 483.8 | 443.9 |
| Lowest frequencyMHz | 418.8 | 400.2 |
| Highest frequencyMHz | 559.0 | 495.7 |
| Spectral index | 41.91 | 38.99 |
| Spectral running | -110.40 | -188.31 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 189.812± 0.209degrees
dec- 25.487± 0.234degrees
gl- 243.25degrees
gb- 86.81degrees
Detection and dispersion
bonsai_snr- 13.2
snr_fitb- 31.3
bonsai_dm- 777.2pc cm⁻³
dm_fitb- 774.1413± 0.16344pc cm⁻³
dm_exc_ne2001- 754.2pc cm⁻³
dm_exc_ymw16- 753.3pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59456.918892888± 1.13 × 10⁻⁸MJD
mjd_infDiffers between sub-bursts.- 59456.918660750416± 5.03 × 10⁻⁸MJD
Burst shape
bc_width- 0.05014s
width_fitbDiffers between sub-bursts.- 0.008440± 0.0006263s
scat_time- 0.000000s
Flux and spectrum
flux- 0.36± 0.18Jy
fluence- 2.72± 0.17Jy ms
peak_freqDiffers between sub-bursts.- 443.9MHz
low_freqDiffers between sub-bursts.- 400.2MHz
high_freqDiffers between sub-bursts.- 495.7MHz
sp_idxDiffers between sub-bursts.- 38.99± 4.80
sp_runDiffers between sub-bursts.- -188.31± 21.84
Exposure and fluence thresholds
exp_up- 79.77± 45.58hour
exp_low- 0.00± 0.00hour
low_ft_68- —
up_ft_68- 1.7Jy ms
low_ft_95- —
up_ft_95- 2.7Jy ms
Fit quality
chi_sq- 1761091.446
dof- 1762063
flag_frac- 0.336