Recent photometry of Reccurent Nova T CrB
ATel #16028; V. Marchev (Bulgarian Academy of Sciences), D. Marchev (Shumen University)
on 5 May 2023; 10:58 UT
Credential Certification: Vladislav Marchev (vlad.marchev@gmail.com)
Subjects: Optical, Cataclysmic Variable, Nova, Variables
The recurrent nova T CrB is approaching predicted outburst (Schaefer 2023) and has been observed in high state since 2015 (Ilkiewicz et al. 2016). This is why T Coronae Borealis is of particular interest to many scientific groups working with optical band observations on Symbiotic Variables, Novae and Binaries. On the 2nd of May we conducted photometrical observations using a 40 cm Schmidt-Cassegrain telescope (MEADE) with CCD camera at the observatory of the Shumen University. During the night we made 64 images with V band filter and Sloan g' filter and exposure times of 20, 30 seconds. We used the following standards 5- TYC 2037-1228-1, HD 143352, HD 143256, 2MASS J15594126+2553353 and BD+26 2764 to increase precision and check the consistency of the results. The achieved magnitudes are respectively V=9.940+/-0.119mag and for g'=10.548+/-0.124mag, with relative precision 0.003mag and 0.002mag for each point. The data plot is presented in the figure below. This study was performed with the help and funding of RACIO in the National Roadmap of Research Infrastructure.
Plot for V and g' of T CrB
