3 ms·
What's the frequency, Kenneth? What part of the spectrum are we even talking about here?
by greenbit 5y ago
What's the frequency, Kenneth? What part of the spectrum are we even talking about here?
- ud_0 5y agoThe ASKAP scans at 888MHz. From the paper, which luckily is publicly available: > It exhibited a high degree (∼ 25%) of circular polarization when it was visible. We monitored the source with the MeerKAT telescope from 2020 November to 2021 February on a 2–4 week cadence. The source was not detected with MeerKAT before 2021 February 07 when it appeared and reached a peak flux density of 5.6 mJy. The source was still highly circularly polarized, but also showed up to 80% linear polarization, and then faded rapidly with a timescale of one day. The rotation measure of the source varied significantly, from −11.8±0.8 rad m−2 to −64.0±1.5 rad m−2 , over three days. No X-ray counterpart was found in follow-up Swift or Chandra observations about a week after the first MeerKAT detection, with upper limits of ∼ 5.0 × 1031 erg s−1 (0.3–8 keV, assuming a distance ∼ 10 kpc). No counterpart is seen in new or archival near-infrared observations down to J = 20.8 mag. https://arxiv.org/pdf/2109.00652.pdf https://arxiv.org/pdf/2109.00652.pdf