[vsnet-alert 23090] ASASSN-19hl - bright (11m) large-amplitude object in Puppis

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

ASAS-SN has reported a new bright object to Transient Name Server, see
https://wis-tns.weizmann.ac.il/object/2019ckc

AT 2019ckc = ASASSN-19hl
  20190327.03  10.9g  ASAS-SN (K. Z. Stanek, C. S. Kochanek, ASAS-SN team)

I have obtained BVR images of this object with iTelescope.Net T09
instrument (0.127-m f/5.6 refractor + CCD, image scale 2.75"/pixel) in
Siding Spring, Australia. Three 60-second exposures were obtained in
each filter from 13:28 to 13:46 UT on 2019 Mar. 27th.

Using the nearby TYC 7125-2955-1 as a reference star, the following
magnitudes were measured for ASASSN-19hl:

ASASSN-19hl
  20190327.563  11.34R  T09
  20190327.568  11.06V  T09
  20190327.573  11.08B  T09

Color-combined iTelescope.Net T09 image (10'x10' FOV):
http://scan.sai.msu.ru/~denis/ASASSN-19hl-T09-20190327-RGB.jpg

The position of the OT is 08 11 33.50 -32 44 35.1 (+/-0.3 arcsec).
There is a blue 19th mag star near this position in USNO-B1.0, PPMXL
catalogs and Gaia DR2.

Color-combined (JRIR) DSS image (10'x10' FOV):
http://scan.sai.msu.ru/~denis/ASASSN-19hl-JRIR.jpg

Gaia DR2 position is 08 11 33.50 -32 44 35.47 (within 0.4" of the
iTelescope.Net measurement) and Gmag=19.56. According to Gaia DR2,
parallax is 3.12+/-0.42 mas which corresponds to the distance 320+/-42
pc. Based on the absolute magnitude at quiescence (M~12) and in
outburst (M~4), this object is likely a dwarf nova of WZ Sge type.

Denis Denisenko