FRB 20181222E
One-off burst
- Event ID
- 23526901
- Arrival, 400 MHz
- 2018-12-22 17:15:12.576 UTC
- Right ascension
- 52.442°
- Declination
- 86.968°
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 | 58474.71889510462 | 58474.71889555053 |
| Arrival time, infinite frequencyMJD | 58474.718796758854 | 58474.71879720477 |
| Width (fitburst)s | 0.000347 | 0.001030 |
| Peak frequencyMHz | 454.6 | 503.5 |
| Highest frequencyMHz | 647.7 | 687.8 |
| Spectral index | 4.68 | 10.87 |
| Spectral running | -18.37 | -23.66 |
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Notes
- This event was included in Catalog 1.
- The pulse emission region was extended during fluence estimation.
- Fitburst. Fitburst was run with an older version that used the upper edge of the frequency channel and the start of the time integration rather than the channel and integration centers used in the current version.
Position
ra- 52.442± 0.043degrees
dec- 86.968± 0.246degrees
gl- 125.06degrees
gb- 24.78degrees
Detection and dispersion
bonsai_snr- 17.7
snr_fitb- 33.7
bonsai_dm- 328.4pc cm⁻³
dm_fitb- 327.9672± 0.00838pc cm⁻³
dm_exc_ne2001- 268.2pc cm⁻³
dm_exc_ymw16- 268.5pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 58474.71889555053± 2.40 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.- 58474.71879720477± 3.47 × 10⁻⁹MJD
Burst shape
bc_width- 0.00295s
width_fitbDiffers between sub-bursts.- 0.001030± 0.0001848s
scat_time- 0.003652± 0.0002878s
Flux and spectrum
flux- 0.94± 0.55Jy
fluence- 0.64± 0.50Jy ms
peak_freqDiffers between sub-bursts.- 503.5MHz
low_freq- 400.2MHz
high_freqDiffers between sub-bursts.- 687.8MHz
sp_idxDiffers between sub-bursts.- 10.87± 4.06
sp_runDiffers between sub-bursts.- -23.66± 6.84
Exposure and fluence thresholds
exp_up- 1421.80± 663.30hour
exp_low- 1281.64± 604.86hour
low_ft_68- 0.5Jy ms
up_ft_68- 0.4Jy ms
low_ft_95- 0.9Jy ms
up_ft_95- 0.7Jy ms
Fit quality
chi_sq- 1766783.516
dof- 1767894
flag_frac- 0.334