The recurrent nova V3890 Sagittarii seems to be erupting!
Confirmation, spectroscopy, and multiband photometry are urgently required.
V3890 Sagittarii (NR+E)
Alfredo Pereira (Carnaxide, Portugal) writes in vsnet-alert 23505:
This recurrent nova was found in outburst [sic] on 2019 Aug. 27.870 UT, mag 6.7.
Congratulations, Alfredo! This should be the third recorded eruption, which I had expected for about 2018 March. Previous eruptions occurred on 1962 June 2 and 1990 April 27.
In recent months I observed V3890 Sgr on almost every night (weather and moonlight permitting). Unfortunately tonight the sky has been overcast here, and the two previous evenings it was too cloudy or hazy low above my southern horizon.
Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data and light curve: https://asas-sn.osu.edu/light_curves/d0da704c-0426-4c88-9c43-b7a43085d9…
SGRV3890 20190827.048 <160g ASN
Failed observations on Aug. 27.76 UT?
"SOAR spectroscopic confirmation of a new eruption of the recurrent nova V3890 Sgr": http://www.astronomerstelegram.org/?read=13047
Unfortunately they did not mention the following observation by Rod Stubbings: 2019 Aug. 27.521 UT, mv= 15.2 (still at quiescence).
An unfiltered photograph of V3890 Sgr in outburst taken 02:30 UT August 28th with a Canon EOS Digital Rebel SX, 70 second exposure, f/4, ISO 1600, focal length 27mm.
Hi all, I visually observed this recurrent nova tonight 2019 Aug. 31.88056 at magnitude 9.6
APM 120mm binoculars at x52. Its definitely fading, for now... let’s see what it will do
I photographed this star from Yuzhno-Morskoy (near Nakhodka, Russia) with my camera Canon EOS 60D, 135 mm lens.
On the evening of August 29, the mean magnitude was 8.90 TG, on August 31 the magnitude was 9.52 TG, and today it is 9.66 TG. Measurements added to the AAVSO database.
I attach photos for each of the three days.