DOI: https://doi.org/10.30970/vph.60.2023.36
Modernization of telescopes for observing the Sun at the Astronomical Observatory of Ivan Franko Lviv National University
O. Baran, Ye. Vovchyk, A. Prysiazhnyi, I. Pidstryhach, I. Sal'nikov
| Visnyk of the Lviv University. Series Physics
60 (2023) с. 36-43
DOI: https://doi.org/10.30970/vph.60.2023.36 Modernization of telescopes for observing the Sun at the Astronomical Observatory of Ivan Franko Lviv National UniversityO. Baran, Ye. Vovchyk, A. Prysiazhnyi, I. Pidstryhach, I. Sal'nikov | |
(не менше 1800 знаків) At the Astronomical Observatory of the Ivan Franko National University of Lviv (AO LNU) the photoheliograph is used to get images of the Sun in integral light, and the chromospheric-photospheric telescope AFR-2 gives images of the Sun in the hydrogen line \balmeralpha. The article presents the details of the work carried out to upgrade these telescopes. In the photoheliograph, the optical system was completely replaced with an MTO-1000 lens, a new mount for the guiding system was made, and a Sony Alpha 6000 digital camera was installed to record images of the Sun. In the AFR-2 telescope, the old clock drive mechanism was replaced with a new synchronous motor powered by a quartz oscillator. The focusing mechanics of the telescope's optical system was also upgraded. The AFR-2 optical system was modified to use a modern Sony Alpha DSLR-A700 CMOS camera. Also, work was done to upgrade the auxiliary devices that ensure the operation of the interference-polarizing filter IPF-4: instead of the old tube power supply for the thermostat, a new electronic power supply based on modern components with a control unit that provides a more stable operating temperature was manufactured; a new fastening mechanism of the interference-polarizing filter was made to facilitate its installation and adjustment; an electronic thermometer was installed to measure the temperature of the AFP-2 telescope tube. Diffusers were constructed for both telescopes to obtain flat-field images. To process the observation data, a complete software package was developed using the AviStack2 program (http://www.avistack.de/). These changes will significantly improve the accuracy of registration, simplify observations and processing of the results obtained in digital form. This will make it possible to continue systematic photographic observations of the Sun in the AO LNU.