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ASASSN-18cs: likely dwarf nova outburst (13.7 mag) in Scorpius (ATel #11300)

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SPK
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ASASSN-18cs: likely dwarf nova outburst (13.7 mag) in Scorpius (ATel #11300)

ASASSN-18cs (UG:)

K. Z. Stanek, C. S. Kochanek, J. V. Shields, T. A. Thompson (OSU), T. W.-S. Holoien, B. J. Shappee (Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), Subo Dong (KIAA-PKU):
"ASAS-SN Discovery of a Possible Galactic Nova ASASSN-18cs" (ATel #11300)
RA 17:34:08.84, DEC -43:05:50.5; 2018 Feb. 13.37 UT, V= 13.7 mag
http://www.astronomerstelegram.org/?read=11300

ASASSN-18cs 20171017.03 <174V ASN
ASASSN-18cs 20180213.37 137V ASN
ASASSN-18cs 20180214.38 137g ASN

A Gaia DR1 source (17:34:08.90 -43:05:50.5, G= 18.68 mag) is 0.7" from the transient's reported position.

ASAS-3 recorded a few outbursts at this position (ASAS 173408-4305.8), two of them reaching V= 13 mag.

Time-resolved photometry and spectroscopy are urgently required.

Clear skies,
Patrick

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484