MASTER-OAFA discovery: 9 mag amplitude outburst in SMC
ATel #9621: http://www.astronomerstelegram.org/?read=9621
MASTER OT J010603.18-744715.8 discovery – more then 9 mag amplitude outburst in SMC
MASTER-OAFA auto-detection system (Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L) discovered OT source at (RA, Dec) = 01h 06m 03.18s -74d 47m 15.8s on 2016-10-14.19341 UT.
The OT magnitude in unfilter is 10.9m (limit 18.3m). The OT is seen in 3 images. There is no minor planet at
We have reference image without OT on 2016-08-01.21289 UT with unfiltered mlim=18.9m. There is a GALEX source and USNO-B1 star in 0.9" with B=20.17, R=20.00
Spectral observations are required.
The discovery and reference images are available at:
Credential certification: Nataly Tyurina
The above mentioned (blue) USNO-B1 star is also listed in the MCPS Catalog (Magellanic Clouds Photometric Survey: the SMC; Zaritsky+, 2002) as follows:
RA 01 06 03.35, DEC -74 47 15.5 (J2000.0)
V= 20.583, B= 20.445, U= 19.717 mag
Thankyou Patrick for bringing this probable Nova to my attention. Because of your timely email I have been able to immediately observe this field and confirm the OT with the following V, Rc, Ic observations:
V = 10.71 (0.04) JD 2457676.054
Rc = 9.59 (0.02) JD 2457676.055
Ic = 9.28 (0.05) JD 2457676.056
Through cloudy skies, I've been able to visually confirm this nova suspect. On Oct 14.61UT, it was mag 10.5.
Andrew Pearce (PEX)
Shumkov et al. (ATel #9621) reported the discovery of a bright optical transient MASTER OT J010603.18-744715.8 toward the Small Magellanic Cloud. The object is located in the fields SMC727 and SMC734 that are regularly monitored by the OGLE-IV Survey.
The star was saturated in the image acquired on 2016 October 14.11706 UT, meaning it was brighter than I=11 mag. The last pre-eruption image was taken on October 6.15547 UT.
The progenitor was clearly visible in the OGLE images at equatorial coordinates of R.A. = 01:06:03.27, Decl. = -74:47:15.8 (J2000.0). It had the mean magnitude of I = 20.84 mag and color (V-I) = 0.16 mag. The progenitor showed semi-regular variability on a timescale of 20-30 days.
The transient's brightness and its progenitor's properties suggest it is a classical nova.
Precise I-band photometry of the star will be available via the OGLE CVOM system once the star fades below the saturation limit.
Finding charts can be found here:
P. Mroz, A. Udalski (Warsaw University Observatory), on behalf of the OGLE team
ATel #9622: http://www.astronomerstelegram.org/?read=9622
Spectroscopic Confirmation of MASTER OT J010603.18-744715.8 as a Classical Nova in the SMC
"... This spectrum confirms MASTER OT J010603.18-744715.8 is a classical nova eruption in the SMC and we classify it as a member of the He/N spectroscopic class. We note that this is the first nova observed in the SMC since 2012 and further follow-up observations are strongly encouraged."
ATel #9628; S. C. Williams (Lancaster), M. J. Darnley (LJMU)
AAVSO Alert Notice 557 reports on the classical nova discovered in the Small Magellanic Cloud (Tuc), MASTER OT J010603.18-744715.8. Please see the notice for information, observations, and observing instructions.
Elizabeth Waagen, AAVSO HQ