No X-rays from the gamma-ray bright classical nova V1707 Sco
ATel #13197; K. V. Sokolovsky, A. C. Muethel, E. Aydi, L. Chomiuk, A. Kawash, J. Strader (MSU), K. Mukai (NASA/GSFC)
on 16 Oct 2019; 22:02 UT
Credential Certification: Kirill Sokolovsky (kirx@scan.sai.msu.ru)
Subjects: Ultra-Violet, X-ray, Nova
Nova Scorpii 2019 #2 (V1707 Sco, PNV J17370958-3510211) was
discovered on 2019-09-15.4247 UT by K. Itagaki and
spectroscopically confirmed as a Fe II type nova (ATel #13112).
After the initial detection, it was declining fast with
t2=4.8 days according to the AAVSO photometry.
The nova was detected at E>100 MeV by Fermi/LAT (ATel #13116).
Swift observed the nova for a total exposure of 3.4 ks split
in four epochs between 2019-09-25 and 2019-10-15 (10 to 29 days
after discovery). No X-ray source was detected by Swift/XRT down to
the count rate of 0.001 cts/s. Assuming the power law emission with
the photon index of 1.7 and HI column density of 3x10^20 cm^-2 this
corresponds to the unabsorbed 0.3-10 keV flux limit
of 10^-14 ergs/cm^2/s. The nova is also not visible in UVW1
and UVM2 band Swift/UVOT images down to the magnitude limit
of 19.8 (Vega system).
We thank the Neil Gehrels Swift Observatory team and PI,
Brad Cenko, for scheduling these ToO observations.
We thank the AAVSO observers BLD, CKB, CMQ, FRIB, HMB, MRV, NLX,
PEX, RFP, SCMA, SPET, TYS, WCG for their valuable contributions.
Koji's List of Recent Galactic Novae
