Outburst of the recurrent nova 1616-17 U Scorpii
Abstract:
We have been informed by Patrick Schmeer, Bischmisheim, Germany, that the recurrent nova U Scorpii has gone into outburst at visual magnitude 9.5 on February 25.194 UT. Visual confirmation was obtained by Lance Shaw, Pinole, Calfornia, at magnitude 7.6 on Feb 25.5625, and by Michael Mattiazzo, Wallaroo, South Australia, at magnitude 8.0 on Feb 25.625. This outburst has also been reported by the Central Bureau for Astronomical Telegrams in IAU Circular 7113.
Justification:
Other outbursts of U Sco have occurred in 1863, 1906, 1936, 1979 (see AAVSO Alert Notice 31), and 1987 (see AAVSO Alert Notice 93). In the 1979 outburst, U Sco, which is V magnitude 17.9 at minimum, was reported in outburst on June 24 at visual magnitude 9.4 and faded to <13.6 by July 4. In 1987, U Sco was reported in outburst on May 15 at visual magnitude 10.8 and faded to <15.0 by May 29; it is believed that the beginning of this outburst may not have been observed.
Requested Data Types:
Photometry
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
V (Johnson)
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
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Notes:
Principal Investigator: N/A; Imported Campaign (Alert Notice #255)