[vsnet-campaign-dn 15985] LL And outburst
LL And outburst Of course, this is a top-priority target! The 2004 superoutburst occurred in June and no good observations were reported. See https://ui.adsabs.harvard.edu/abs/2004PASJ...56S.135K/abstract for the 1993 superoutburst. Determination of the superhump period is very important. YYYYMMDD(UT) mag observer 20210908.9111 <139 (Eddy Muyllaert) 20210909.701 <153 (Hiroyuki Maehara) 20210909.9424 <146 (Eddy Muyllaert) 20210910.219 <17.90C (Gary Poyner) 20210910.9257 <146 (Eddy Muyllaert) 20210910.9375 <146 (Jose Ripero) 20210911.9299 <146 (Eddy Muyllaert) 20210914.901 128C (Jeremy Shears)
LL And: showing superhumps Kyoto Univ. Obs. has reported the time-resolved observation of LL And. LL And indeed shows a modulation likely a superhump, however the data was not enough to decide its profile and period. More continuous follow-up observations are needed to explore its nature! Best, Yusuke
LL Andromedae (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=260 This WZ Sagittae-type dwarf nova is now rapidly fading according to recent ASAS-SN Sky Patrol data: https://asas-sn.osu.edu/sky-patrol/coordinate/edccf82a-66c7-48c5-8d32-4ac28c... LL And was already in outburst on 2021 September 12.432 UT according to ATLAS forced photometry results: ANDLL 20210910.4361 19.811cy ATLAS ANDLL 20210912.4317 12.262o ATLAS ANDLL 20210912.4335 12.258o ATLAS ANDLL 20210912.4363 12.249o ATLAS ANDLL 20210912.4414 12.207o ATLAS ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF21acbalhp/ AAVSO data: https://app.aavso.org/webobs/results/?star=000-BBB-961 Time-resolved photometry is still encouraged. Clear skies, Patrick ------------ References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M ------------ Taichi Kato wrote on Tuesday, 14 September 2021, 23:47:21 UTC: LL And outburst Of course, this is a top-priority target! The 2004 superoutburst occurred in June and no good observations were reported. See https://ui.adsabs.harvard.edu/abs/2004PASJ...56S.135K/abstract for the 1993 superoutburst. Determination of the superhump period is very important. YYYYMMDD(UT) mag observer 20210908.9111 <139 (Eddy Muyllaert) 20210909.701 <153 (Hiroyuki Maehara) 20210909.9424 <146 (Eddy Muyllaert) 20210910.219 <17.90C (Gary Poyner) 20210910.9257 <146 (Eddy Muyllaert) 20210910.9375 <146 (Jose Ripero) 20210911.9299 <146 (Eddy Muyllaert) 20210914.901 128C (Jeremy Shears)
participants (3)
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Patrick Schmeer -
Taichi Kato -
反保雄介