No bright optical counterpart to the AGILE gamma-ray source AGL J2114+6249
ATel #16013; Kirill Sokolovsky (UIUC), Stanislav Korotkiy (Ka-Dar Obs./Astrovert), Olga Smolyankina (Observatory of Omsk CPCT), Anna Prokudina, Sergei Ostapenko
on 26 Apr 2023; 19:46 UT
Credential Certification: Kirill Sokolovsky (kirx@scan.sai.msu.ru)
Subjects: Optical, >GeV, Transient
The AGILE mission has reported the detection of an unidentified,
bright gamma-ray source (2.6 +/- 1.0) x10^-6 photons/cm^2/s
(E>100 MeV; ATel #16012) during a two-day integration from
2023-04-24.37 to 2023-04-26.37 UT. We pointed the NMW wide-field
optical camera (135mm f/2.0 telephoto lens with an unfiltered SBIG
ST-8300M CCD; http://scan.sai.msu.ru/nmw/ ) at AGL J2114+6249
to investigate whether the gamma-ray transient might be linked to
an undiscovered Galactic nova. No new sources brighter than V= 13.0
were visible in the NMW images obtained on 2023-04-26.721,
as compared to archival NMW and POSS-II Red images.
Considering a total Galactic extinction in the direction of
AGL J2114+6249 of A(V)= 2.23 (Schlegel, Finkbeiner & Davis, 1998),
a typical nova with a peak absolute magnitude of M_V= -7.0 at
a distance of 8 kpc would have been visible at V= 9.7.
Plate-solved FITS images and the ds9 region marking the position of AGL J2114+6249
