MGAB-V207 at mag. 5.3: likely nova eruption! (in Reticulum)

Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Wed, 07/15/2020 - 21:24


Excerpts from CBET 4811:
"Robert H. McNaught, Coonabarabran, NSW, Australia, has found an apparent 5th-magnitude nova on CCD images obtained on July 15.590 UT with a Canon 6D camera and an 8-mm-f.l. f/2.8 lens"
"... he obtained visual mag 5.3 with 2.3x40 opera glasses (using AAVSO A chart for MGAB-V207)." (behind paywall)

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data:…
MGAB-V207 20200702.183 16.56g ASN
MGAB-V207 20200702.186 16.33g ASN
MGAB-V207 20200704.189 15.51g ASN
MGAB-V207 20200708.171 6.78g ASN
MGAB-V207 20200708.172 6.78g ASN
MGAB-V207 20200708.173 6.77g ASN
The eruption apparently began already on 2020 July 4.

Spectroscopy, multiband photometry, and precise astrometry are urgently required.

Clear skies,

American Association of Variable Star Observers (AAVSO)
MGAB-V207 = N Ret 2020 - Alert Notice 711

AAVSO Alert Notice 711 reports on the discovery of the nova outburst of MGAB-V207 = N Ret 2020. Please see the notice for details and observing instructions.

This object has threads in the following forums: Time Sensitive Reports, Novae, and Cataclysmic Variables. To stay informed about it, subscribe to these threads (option 1 below under Subscribe in each thread) - see comments and questions from observers, information about any campaigns on it, and notes from AAVSO HQ. Add a post yourself  -  join in the discussion!

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

American Association of Variable Star Observers (AAVSO)
NuSTAR (X-ray) Observing

Hi All,

I am part of a group that distributes information about potential multi-instrument simultaneous observing opportunities. As part of this group, I saw an alert about NuSTAR observations of this source. Since I am not directly involved with this science, I'm not sure how useful simultaneous X-ray + optical observations are. But in case they are I wanted to post the planned observation times.


This translates to July 17, 2020 (tonight) from 23:35:16 UTC to July 19, 2020 10:45:00.
I am hopeful the people more directly involved with this outburst can comment on potential research applications and collaboration between professional astronomers and AAVSO members/observers.


Greg Sivakoff