FRB 20211225A
One-off burst
- Event ID
- 204395979
- Arrival, 400 MHz
- 2021-12-25 05:08:13.450 UTC
- Right ascension
- 234.552°
- Declination
- 80.880°
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 | 59573.21404450955 | 59573.21404455502 |
| Arrival time, infinite frequencyMJD | 59573.21379552589 | 59573.213795571355 |
| Width (fitburst)s | 0.000276 | 0.000536 |
| Peak frequencyMHz | 531.2 | 515.9 |
| Lowest frequencyMHz | 442.1 | 400.2 |
| Highest frequencyMHz | 638.4 | 757.2 |
| Spectral index | 38.60 | 7.94 |
| Spectral running | -68.14 | -15.64 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 234.552± 0.185degrees
dec- 80.880± 0.276degrees
gl- 115.65degrees
gb- 33.75degrees
Detection and dispersion
bonsai_snr- 24.5
snr_fitb- 32.4
bonsai_dm- 829.4pc cm⁻³
dm_fitb- 830.3202± 0.00505pc cm⁻³
dm_exc_ne2001- 784.9pc cm⁻³
dm_exc_ymw16- 790.8pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59573.21404455502± 6.65 × 10⁻¹⁰MJD
mjd_infDiffers between sub-bursts.- 59573.213795571355± 1.65 × 10⁻⁹MJD
Burst shape
bc_width- 0.00197s
width_fitbDiffers between sub-bursts.- 0.000536± 0.0000155s
scat_time- 0.000000s
Flux and spectrum
flux- 1.83± 0.65Jy
fluence- 5.97± 1.90Jy ms
peak_freqDiffers between sub-bursts.- 515.9MHz
low_freqDiffers between sub-bursts.- 400.2MHz
high_freqDiffers between sub-bursts.- 757.2MHz
sp_idxDiffers between sub-bursts.- 7.94± 1.21
sp_runDiffers between sub-bursts.- -15.64± 1.92
Exposure and fluence thresholds
exp_up- 436.90± 235.64hour
exp_low- 506.06± 242.34hour
low_ft_68- 3.0Jy ms
up_ft_68- 1.0Jy ms
low_ft_95- 5.3Jy ms
up_ft_95- 1.9Jy ms
Fit quality
chi_sq- 1547994.679
dof- 1549033
flag_frac- 0.416