Pre-Discovery Detections of the Nova Delphini Outburst
ATel #5316; Wren, J., Vestrand, W. T., Wozniak, P., Davis, H. (Los Alamos National Laboratory)
on 23 Aug 2013; 19:09 UT
Credential Certification: James Wren (jwren@lanl.gov)
Subjects: Optical, Nova, Transient
Three RAPTOR full-sky persistent monitors located in Los Alamos, NM, and Maui,
HI, detected the emergence of Nova Delphini 2013 (CBET #3628) at magnitude 10.1
at 6:58 UT on 14 Aug, 2013. Our photometry of the nova shows a rapid rise to
approximately magnitude 8.5 by 8 UT and then a more gradual rise to
approximately magnitude 7.5 by 14 UT (the time of discovery by Koichi Itagaki).
Our full-sky persistent monitors imaged the nova every 10s during this time
period, a total of about 2500 photometric measurements before 14 UT. Our
unfiltered images were calibrated to the Tycho-2 V-band catalog.
