Something unusual first came to light in April and May, when the team was studying a series of small and relatively cool red dwarf stars, some of which are known to have planets circling them. He added that there may be three possible scenarios that could explain the origin of the signals - they could be Type II solar flare-like emissions, they could be emanating from another object in Ross 128's field of view, or they could simply be bursts from a high-orbit satellite.
The signals were observed May 13 at 0053 GMT, and "consisted of broadband quasi-periodic non-polarized pulses with very strong dispersion-like features", he wrote.
"The signals are unique to Ross 128 and observations of other stars immediately before and after did not show anything similar", Professor Méndez said.
Ross 128 was observed for 10 minutes with the radio telescope, with the signal being picked up during observation and being nearly period throughout that time.
The signals are probably too dim for other radio telescopes in the world and are now under calibration.
As many have interpreted the Ross 128 signals as a possible sign of alien life, Mendez stressed that this is "at the bottom of many other better explanations".More news: Netanyahu Visits Orban In Hungary, Refutes Anti-Semitic Narrative
The signals behavior is similar to Type II solar flares, which are energetic events that vary rapidly in time and energy levels, but those are at a much lower frequency than what the observatory noticed.
Meanwhile, the patch of space around Ross 128 has few objects and the idea that satellites would emit a radio burst like that have never been seen.
"Two weeks after initial observations, we realized that there were some very peculiar signals in the 10-min dynamic spectrum that we obtained from Ross 128, observed on May 12", he added.
"Therefore, we have a mystery here and the three main explanations are as good as any at this moment", it said. We will also observe Barnard's star that day to collaborate with the Red Dots project.
These suggestions aren't so straightforward however as they each present their own problems, according to the observatory. Abel Mendez, an astrobiologist at the University of Puerto Rico, originally said he thought the signal was from a human satellite that passed through the telescope's line of sight and was using the same frequency.