ASASSN-17mt: classical Galactic nova (11 mag) in Vela

Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Thu, 09/28/2017 - 21:16

ASASSN-17mt (N)

ASASSN-17mt 8:50:29.57 -47:45:28.5 2017-09-24.4 11.29
Galactic nova candidate, V~11.3

"ASAS-SN Discovery of a Possible Bright Galactic Nova ASASSN-17mt" (ATel #10772):

"Archival Data Spectral Energy Distribution and Variability of the ASASSN-17mt Transient" (ATel #10774):

"Multi-Band Photometry of a Bright Galactic Plane Transient ASASSN-17mt Supports the Nova Scenario" (ATel #10785):

"Spectroscopic confirmation of ASASSN-17mt as a classical nova in the optically thick (Fe curtain) stage" (ATel #10795):

Clear skies,

American Association of Variable Star Observers (AAVSO)
Nova identification

It is also worth noting that since the outburst amplitude is too small, the progenitor may actually be a background star and not the 16.9 Vmag. star 2MASS J08502962-4745283.
There is a 18th mag. star 2" away that might be a better candidate. Or maybe none of them!
Accurate astrometry is encouraged.


American Association of Variable Star Observers (AAVSO)
Observations needed of nova ASASSN-17mt

AAVSO Alert Notice 606 reports on the nova in Vela discovered on September 24, and includes a multiwavelength observing campaign underway. Please see the notice for details and observing instructions.

Many thanks, and Good observing!

Elizabeth Waagen, AAVSO HQ


American Association of Variable Star Observers (AAVSO)
ASASSN-17mt rapidly brightening

Very rapid brightening...

Up one mage (11 to 10) in past 6 hours based on visual and in last 90 minutes this AM it was up another 0.13  in both V and I.  (V now 9.95, I=7.86)  Data submitted