FRB 20181222A
A burst from FRB20180916B
- Repeater
- FRB20180916B
- Arrival, 400 MHz
- 2018-12-22 03:59:23.288 UTC
- Right ascension
- 29.503°
- Declination
- 65.717°
How the sub-bursts differ
This burst has 4 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 | Sub-burst 3 | Sub-burst 4 |
|---|---|---|---|---|
| Arrival time, 400 MHzMJD | 58474.16624160993 | 58474.16624166518 | 58474.1662417617 | 58474.1662418705 |
| Arrival time, infinite frequencyMJD | 58474.16613703619 | 58474.16613709144 | 58474.16613718796 | 58474.1661372968 |
| Width (fitburst)s | 0.005158 | 0.000382 | 0.001718 | 0.005810 |
| Peak frequencyMHz | 713.2 | 699.0 | 671.6 | 649.3 |
| Lowest frequencyMHz | 577.7 | 563.5 | 552.4 | 540.4 |
| Highest frequencyMHz | 800.2 | 800.2 | 800.2 | 780.2 |
| Spectral index | 60.00 | 55.30 | 62.50 | 66.10 |
| Spectral running | -51.90 | -49.60 | -60.40 | -68.30 |
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Notes
- Right ascension. RA from Marcote et al. (2020)
- Declination. Dec from Marcote et al. (2020)
- Upper transit exposure. No error on exposure due to precise position. See Section 2.2.
Position
ra- 29.503± 0.000degrees
dec- 65.717± 0.000degrees
gl- 129.71degrees
gb- 3.73degrees
Detection and dispersion
bonsai_snr- 24.0
snr_fitb- 214.4
bonsai_dm- 349.4pc cm⁻³
dm_fitb- 348.7365± 0.00030pc cm⁻³
dm_exc_ne2001- 149.8pc cm⁻³
dm_exc_ymw16- 23.9pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 58474.1662417617± 4.50 × 10⁻¹⁰MJD
mjd_infDiffers between sub-bursts.- 58474.16613718796± 4.60 × 10⁻¹⁰MJD
Burst shape
bc_width- 0.03539s
width_fitbDiffers between sub-bursts.- 0.001718± 0.0000380s
scat_time- <0.00039s
Flux and spectrum
flux- 4.90± 1.50Jy
fluence- 50.00± 15.00Jy ms
peak_freqDiffers between sub-bursts.- 671.6MHz
low_freqDiffers between sub-bursts.- 552.4MHz
high_freqDiffers between sub-bursts.- 800.2MHz
sp_idxDiffers between sub-bursts.- 62.50± 2.40
sp_runDiffers between sub-bursts.- -60.40± 2.30
Exposure and fluence thresholds
exp_up- 46.06± 0.00hour
exp_low- —
low_ft_68- 0.0Jy ms
up_ft_68- 6.8Jy ms
low_ft_95- 0.0Jy ms
up_ft_95- 26.1Jy ms
Fit quality
chi_sq- 1162519.685
dof- 1097419
flag_frac- 0.295