Further brightening of DDE 46 in Serpens
ATel #8845; D. Denisenko (Sternberg Astronomical Institute, Lomonosov Moscow State University)
on 20 Mar 2016; 09:47 UT
Credential Certification: Denis Denisenko (d.v.denisenko@gmail.com)
Subjects: Optical, Cataclysmic Variable, Transient, Variables
Following the discovery of optical transient in Serpens reported in ATel #8842, confirmation images were obtained on the next night (Mar. 19) remotely with the same iTelescope.Net T31 instrument at Siding Spring observatory. The object has brightened by additional 1.4 mag in 24 hours since the first detection. The available photometry (unfiltered with the red zero point) is listed below.
DDE 46 photometry from T31 images
2016 Date UT ---- JD ---- Mag.
-------------------------------
Mar. 12.783 2457460.283 <19.0
Mar. 18.780 2457466.280 17.90
Mar. 18.783 2457466.283 17.85
Mar. 19.785 2457467.285 16.52
Mar. 19.788 2457467.288 16.53
Animation of T31 images centered at the position of new variable (17 19 24.03 -15 05 54.4) is uploaded to http://scan.sai.msu.ru/~denis/DDE46-anim-T31.gif (deep 30x60-sec. reference image combined from 2016 Feb. 20 - Mar. 12 observations against 3x60-sec. Mar. 12 pre-outburst, Mar. 18 discovery and Mar. 19 confirmation images).
Given the galactic position (l=8.5, b=+12.5), the object is most likely a dwarf nova caught on the rise to maximum and less likely a classical Nova. Spectroscopic confirmation, multi-color photometry and time series are requested.
DDE 46 pre-outburst and discovery images
