1. Home
  2. Forums
  3. Variable Star Observing
  4. Time Sensitive Alerts

ASASSN-18ds: new transient (14.3 mag) in Scorpius (ATel #11348)

SPK
Affiliation
Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Sat, 02/24/2018 - 20:18

SASSN-18ds (N/UG)

"ASAS-SN Discovery of a Possible Galactic Nova ASASSN-18ds":
http://www.astronomerstelegram.org/?read=11348

RA 17:03:47.51, DEC -38:16:57.14 (J2000.0)

ASASSN-18ds 20180222.32 <177V ASN
ASASSN-18ds 20180224.36 143V ASN

VVV J170347.56-381658.24 = 2MASS J17034754-3816581 is 1" away.

Spectroscopy and time-resolved photometry are urgently required.

Clear skies,
Patrick

FRF
Affiliation
Magyar Csillagaszati Egyesulet, Valtozocsillag Szakcsoport (Hungary) (MCSE)
Tue, 02/27/2018 - 05:01
Spectroscopic classification of ASASSN-18ds as a classical nova

"The spectrum is dominated by the strong emission blend of Halpha and [NII]. In addition to the Balmer lines, strong FeII emission lines are present, blended with their respective blue-shifted absorption lines. We interpret the spectrum as that of an FeII-class nova during the pre-maximum phase.

 

Unfortunately, the object is slightly saturated on the R acquisition image. Comparing with the brightest star in the field, USNO 0450.26357218, which is not saturated, we find that the nova is brighter than R=12.4mag during our observation. This confirms that it is still on the rise to maximum."

 

http://www.astronomerstelegram.org/?read=11360

If I'm right this is the 6th galactic nova in 2018 and the 3rd in Sco.