FRB 20220225A
A burst from FRB20180916B
- Repeater
- FRB20180916B
- Event ID
- 213124545
- Arrival, 400 MHz
- 2022-02-25 23:35:19.284 UTC
- Right ascension
- 29.543°
- Declination
- 65.721°
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 | 59635.98286178056 | 59635.98286207798 |
| Arrival time, infinite frequencyMJD | 59635.982757174694 | 59635.98275747211 |
| Width (fitburst)s | 0.004147 | 0.000961 |
| Peak frequencyMHz | 460.5 | 451.9 |
| Highest frequencyMHz | 541.8 | 520.4 |
| Spectral index | 24.43 | 28.10 |
| Spectral running | -87.02 | -115.60 |
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Notes
- The pulse emission region was extended during fluence estimation.
Position
ra- 29.543± 0.212degrees
dec- 65.721± 0.226degrees
gl- 129.73degrees
gb- 3.73degrees
Detection and dispersion
bonsai_snr- 12.7
snr_fitb- 19.9
bonsai_dm- 349.0pc cm⁻³
dm_fitb- 348.8437± 0.07557pc cm⁻³
dm_exc_ne2001- 150.3pc cm⁻³
dm_exc_ymw16- 25.9pc cm⁻³
Arrival time
mjd_400Differs between sub-bursts.- 59635.98286207798± 5.73 × 10⁻⁹MJD
mjd_infDiffers between sub-bursts.- 59635.98275747211± 2.34 × 10⁻⁸MJD
Burst shape
bc_width- 0.03932s
width_fitbDiffers between sub-bursts.- 0.000961± 0.0002383s
scat_time- 0.005675± 0.0008455s
Flux and spectrum
flux- 0.55± 0.29Jy
fluence- 3.84± 1.16Jy ms
peak_freqDiffers between sub-bursts.- 451.9MHz
low_freq- 400.2MHz
high_freqDiffers between sub-bursts.- 520.4MHz
sp_idxDiffers between sub-bursts.- 28.10± 4.96
sp_runDiffers between sub-bursts.- -115.60± 18.57
Exposure and fluence thresholds
exp_up- 188.64± 108.31hour
exp_low- 0.00± 0.00hour
low_ft_68- 0.0Jy ms
up_ft_68- 4.5Jy ms
low_ft_95- 0.0Jy ms
up_ft_95- 10.0Jy ms
Fit quality
chi_sq- 1886095.525
dof- 1886478
flag_frac- 0.289