Strange Signals from the Nearby Red Dwarf Star Ross 128
Full story: http://phl.upr.edu/library/notes/ross128

We are conducting a scientific campaign from the Arecibo Observatory to
observe red dwarf star with planets. These observations might provide
information about the radiation and magnetic environment around these
stars or even hint the presence of new sub-stellar objects including
planets. So far, we observed Gliese 436, Ross 128, Wolf 359, HD 95735,
BD +202465, V* RY Sex, and K2-18. Only Gliese 436 and K2-18 are known to
have planets. Observations were done between April and May 2017 in the
C-band (4 to 5 GHz).

Two weeks after these observations, we realized that there were some
very peculiar signals in the 10-minute dynamic spectrum that we obtained
from Ross 128 (GJ 447), observed May 12 at 8:53 PM AST (2017/05/13
00:53:55 UTC). The signals consisted of broadband quasi-periodic
non-polarized pulses with very strong dispersion-like features. We
believe that the signals are not local radio frequency interferences
(RFI) since they are unique to Ross 128 and observations of other stars
immediately before and after did not show anything similar.

We do not know the origin of these signals but there are three main
possible explanations:

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