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ASASSN-19oa: new transient (15.6 mag) in Crux - dwarf nova or nova?

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SPK
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ASASSN-19oa: new transient (15.6 mag) in Crux - dwarf nova or nova?

ASASSN-19oa (UG/N)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=689840

"Possible Galactic Nova, on the rise, could also be a CV, very close to the Galactic plane l/b=301.384/-0.076"
https://wis-tns.weizmann.ac.il/object/2019gvk

ASASSN-19oa 20190601.16 <184g ASN
ASASSN-19oa 20190603.17 156g ASN

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data and light curve: https://asas-sn.osu.edu/light_curves/3ae538a7-9821-485b-ba58-ca4d8330659a

Spectroscopy, precise astrometry (or at least a snapshot), and multiband (and possibly time-resolved) photometry are urgently required.

Clear skies,
Patrick

SPK
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Photometry and astrometry by S. Kiyota

2019 June 4.4268 UT: B=16.75, V=16.30, Rc=16.17, Ic=16.68. R.A. 12 37 51.81 DEC -62 54 28.6 (J2000.0). Dwarf nova?
CCD image: http://meineko.sakura.ne.jp/ccd/ASASSN-19oa.jpg

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