Spooky:
Its a very controlled beam at 888MHz both circularly polarized and linearly polarized.
FROM PAPER:
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 5.6mJy. 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.
We discuss possible identifications for ASKAP J173608.2−321635 including
a low-mass star/substellar object with extremely low infrared luminosity
a pulsar with scatter-broadened pulses
a transient magnetar
Galactic Center Radio Transient
none of these above fully explains the observations, which suggests that ASKAP J173608.2−321635 may represent part of a new class of objects
DRAFT paper : https://www.disxourse.com/paper/2109.00652
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the draft paper refused to posit this alternative :
- Deliberate radio signal between advanced alien probe and its prior origin creators 160,000 light-years away +/- 80,000 light-years, and due to happenstance ; alignment of rotation of our galaxy and path of our solar system and even path of Earth possibly, we caught a peek at its carrier frequency but cannot resolve evidence of its encoded payload, unless it is on a different out of band mode (gravity based, neutrino based, etc). Its in , or in direction of another galaxy, and Earth is now 25,800 light-years from our own center of our galaxy. So the signal is trans-galactic.
My bet, and its not my field, is a Galactic Center Radio Transient attenuated through a periodically lined up gravitational lens, with the lens formed with its own slow orbit around a neutron star(s), explaining its eccentric periodicity of observation. A Black hole would have revealed itself along that path if participating in lens anomaly formation, hence me proposing one or more involved large neutron stars:
https://en.wikipedia.org/wiki/Gravitational_lens
So exciting!
Even the area they were looking at is exciting:
thousands of radio sources we’ve never seen before
http://www.sci-news.com/astronomy/radio-map-large-magellanic-cloud-09978.html
(post is archived)