chan = -1174 signal
chan = -986 comment signal "S"
chan = -959 signal
chan = -681 comment signal "1418.546667-1418.546934 MHz"
chan = 15, 16, 17, 18, 19, 20, 21 signal = 13
chan = 195 signal
chan = 473 signal
voilà, 3 jours -1536 à 1536 chan
:) i am french ^^
Thanks for pointing out those signals. You have very good eyes!
The signals on channel -986 are interesting. They have large slope, poor coherence, and ziz-zag across two of the images. This is a good example of a signal that can be more easily detected by people (because of the zig-zag) than by present SonATA algorithms. SonATA would pick up on any one of the zigs or zags.
-681 -- Also interesting, a broadband (~ 60 Hz wide) drifting signal. In this case, the 10 Hz limit built into SonATA observing software would impede identification of this signal. Might appear with incorrect slope due to wide BW, leanding to a false negative on subsequent observations.
near zero -- all kinds of random-walk signal generators, could these be self-generated? More suspicious because of proximity to "DC," that is, channel zero.
+195 -- upwardly drifting ~10 Hz signal with poor coherence
+473 -- broad and curvy
Qu'est-ce que ca veut dire? The best answer is that we don't immediately know. Looking at observations on the same day in nearby channels can tell us if the signal is a stable source of radio frequency interference (RFI). If signals are not present in data from the same day, then a re-observation might be in order. Can you tell?
By the way, there may have been an error on the date of collection which causes the data called "Tau Ceti" to actually be taken from a different direction on the sky than the actual star, Tau Ceti. This is an issue we have not completely ironed out as of now.