Near-IR observations of the outbursting source ASASSN-18mw
Abstract
In the framework of our EXor monitoring programme dubbed EXORCISM (EXOR OptiCal and Infrared Systematic Monitoring - Antoniucci et al. 2013 PPVI, Lorenzetti et al. 2007 ApJ 665, 1182; Lorenzetti et al. 2009 ApJ 693, 1056), we observed in the near-IR the object ASASSN-18mw recently (June 17) signalled by an ASASSN alert as a possible EXOR candidate in outburst (see also ASASSN transients at http://www.astronomy.ohio-state.edu/asassn/transients.html and AAVSO light-curve at https://www.aavso.org/LCGv2 ). Our photometry has been obtained with the near infrared REMIR camera at the 60-cm robotic telescope REM located at La Silla (Chile): Date J(mag)H(mag) 2018.06.2115.9 & plusmn;0.415.3 & plusmn;0.3 2018.06.2215.9 & plusmn;0.6 - 2018.06.2316.3 & plusmn;0.5 - Compared with the limiting magnitudes due to our small telescope, the source was very faint, nevertheless a decreasing flux density for increasing wavelengths is recognizable; such a trend is more typical of cataclysmic variables (Hoard et al. 2014 ApJ, 786, 68) than of young eruptive variables (Lorenzetti et al. 2012, ApJ, 749,188).
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- July 2018
- Bibcode:
- 2018ATel11811....1G
- Keywords:
-
- Cataclysmic Variable;
- Variables;
- Young Stellar Object