Atmospheric Extinction Measurement Using Narrowband Filter at ITERA Lampung Astronomical Observatory
Rovanni Holly Setiawan (a*), Renza Alvionzo Barends (a), Yaniriang Fau (a), Gusti Ayu Nopia Lestari (a), Loria Oktaviane (a), Titania Jenny Amar Wulan Sari (a), Raihan Arsy (a), Aditya Abdillah Yusuf (b), Adhitya Oktaviandra (b), Izatul Hafizah (b), Hendra Agus Prastyo (a, b)

a) Department of Atmospheric and Planetary Sciences, Sumatera Institute of Technology, Jalan Terusan Ryacudu, Lampung Selatan 35365, Indonesia
*rovanni.119290057[at]student.itera.ac.id
b) ITERA Lampung Astronomical Observatory, Jalan Terusan Ryacudu, Lampung Selatan 35365, Indonesia

Abstract

The atmosphere plays an essential role in sustaining life. On the other hand, it is also detrimental to astronomers. We have performed experiments to collect photometric data on some nebulas so that the influence of the atmosphere on the image results is substantial. Taking into account the physical parameters of the atmosphere is also the basis for measuring the feasibility of observation sites. As for some of the objects we have chosen- namely, Veil Nebula uses OIII filter, while Eagle Nebula uses H-Alpha and SII filters. From the observations, the extinction coefficient values varied the results for each filter. The measurement results of the extinction coefficient on the OIII filter, according to the observation of 5 stars, are 1.189- 1.171- 1.105- 1.146- and 1.082. Then, according to the observations of two standard stars, the extinction coefficient for H-Alpha filters are 1.231 and 1.22, while for SII filters are 0.98 and 0.893.

Keywords: Atmospheric Extinction Measurement- Narrowband Filter- Extinction Coefficient

Topic: EARTH, ATMOSPHERIC, AND SPACE SCIENCE