[vsnet-alert 24215] Swift J0623.9-0939 outburst

[Denis Denisenko d.v.denisenko@gmail.com via vsnet-alert]

This long-period object in Monoceros has brightened by ~1.5m in the course
of a month.
Gaia Alerts detection: http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20bxq/

Gaia20bxq = Swift J0623.9-0939
  20200227.9300  13.94G  Gaia Alerts
  20200321.7862  13.42G
  20200421.0125  12.60G
  20200421.0865  12.86G

Quiescent absolute magnitude from Gaia: M_abs=+2.7 (distance modulus
m-M=11.2).
Gaia DR2 position: 06 24 06.19 -09 38 52.1

Spectroscopic orbital period: P=4.637 d (Halpern et al., 2018,
2018AJ....155..247H)
Photometric period from ATLAS P=4.63255 d (Heinze et al., 2018,
2018AJ....156..241H)

ASAS-SN light curve for the last 100 days (Shappee et al., 2014; Kochanek
et al., 2017):
https://asas-sn.osu.edu/light_curves/47284400-3b7c-4375-972b-68f5c9e11dbc

Last 10 ASAS-SN detections before the forthcoming solar conjunction:

Swift J0623.9-0939
  20200315.0249  14.70g  ASAS-SN
  20200320.8439  14.36g
  20200320.8451  14.38g
  20200321.8413  14.08g
  20200321.8426  14.15g
  20200325.2237  14.10g
  20200325.2263  14.21g
  20200326.2239  14.01g
  20200326.2252  14.01g
  20200326.2265  13.86g

Elongation from the Sun is currently 67 deg and reducing.

Denis Denisenko