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
this place.
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:
http://master.sai.msu.ru/static/OT/010603.18-744715.8.png
Credential certification: Nataly Tyurina
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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
Regards,
Patrick
Hi All
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
Best regards,
Steve
Hi All
Through cloudy skies, I've been able to visually confirm this nova suspect. On Oct 14.61UT, it was mag 10.5.
Regards
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:
http://ogle.astrouw.edu.pl/cont/4_main/var/MASTER010603.18-744715.8.pdf
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)
http://www.astronomerstelegram.org/?read=9628
Pre-discovery observations of the MASTER OT J010603.18-744715.8 Classical Nova in the SMC (ATel #9631):
http://www.astronomerstelegram.org/?read=9631
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.
Good observing,
Elizabeth Waagen, AAVSO HQ