TITLE: GCN CIRCULAR NUMBER: 30236 SUBJECT: Follow-up on HAWC Transient Monitoring Alert J0020+3108 DATE: 21/06/15 00:46:45 GMT FROM: Hugo Ayala at Pennsylvania State University The HAWC collaboration reports: We present here a follow-up of the HAWC alert presented on the circular 30183 (https://gcn.gsfc.nasa.gov/gcn3/30183.gcn3). The alert in 30183 consisted of the integration of 3 transits occurring from 2021-06-06 to 2021-06-08 Here, we show flux measurements for each individual day. The assumed spectrum is a power law with an index of -2.5 and a pivot energy of 1 TeV. Three days after the alert, we don't see any more flux increase. Transits observed: 1: 2021-06-11 10:17:47 - 2021-06-11 16:42:41 UTC 2: 2021-06-10 10:21:42 - 2021-06-10 16:46:37 UTC 3: 2021-06-09 10:25:38 - 2021-06-09 16:50:33 UTC 4: 2021-06-08 10:29:33 - 2021-06-08 16:54:29 UTC 5: 2021-06-07 10:33:29 - 2021-06-07 16:58:25 UTC 6: 2021-06-06 10:37:24 - 2021-06-06 17:02:21 UTC Position observed: RA (J2000): 5.08[deg] Dec (J2000): 31.14[deg] Position uncertainty: 0.10[deg] Transit | Signif.| Flux [x10^-11] | -------------------------------------- 1 | 0.00 | <0.64 (95%). | 2 | 0.40 | <1.43 (95%) | 3 | 0.32 | <1.41 (95%) | 4 | 4.34 | 2.30(+1.76 -1.37) | 5 | 2.10 | 1.23(+1.60 -1.02) | 6 | 3.21 | 1.67(+1.71 -1.18) | Flux units are TeV-1 cm-2 s-1. Significance is pre-trials.