Some information about the dataset
Recording of the signal started around September 2009. The signal was already observed in 2008, however, and perhaps earlier.
The signal occurs at different intensities labeled weak, moderate, strong, very strong, and intense. This calendar only shows the highest intensity of each occurrence.
The source likely changed:
- Source A: from 2009 to 2013
- Source B: from 2013 to 2018-01
- Source C: from 2018-01 until now
Some observations may be spurious (noise, false positives), and some observations may be missing (suppression, false negatives).
Start times are more important than stop times. The signal was sometimes fading away, making it difficult to determine a precise stop time.