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한국천문연구원 Hα 태양전면관측시스템의 바닥고르기 연구
박형민,김연한,봉수찬,박영득,조경석,장비호,최성환,나자경,이승민,채종철,Park, H.M.,Kim, Y.H.,Bong, S.C.,Park, Y.D.,Cho, K.S.,Jang, B.H.,Choi, S.,Nah, J.,Lee, S.M.,Chae, J. 한국천문학회 2008 天文學論叢 Vol.23 No.2
We have performed the flat-fielding correction for the $H{\alpha}$ full-disk monitoring system of KASI (Korea Astronomy and Space Science Institute), which is installed in the Solar Flare Telescope (SOFT) at the top of Bohyun Mountain. For this, we used a new method developed by Chae (2004), to determine the flat pattern from a set of relatively shifted images. Using this method, we successfully obtained the flat pattern for $H{\alpha}$ full-disk observations and compared our result with the image observed in Catania Astrophysical Observatory. The method that we used in this study seems to be quite powerful to obtain the flat image for solar observations. In near future, we will apply this method for the flat-fielding correction of all solar imaging instruments in KASI.
김연한,문용재,조경석,박영득,최성환,장비호,김수진,Kim, Y.H.,Moon, Y.J.,Cho, K.S.,Park, Y.D.,Choi, S.H.,Jang, B.H.,Kim, S. 한국천문학회 2006 天文學論叢 Vol.21 No.2
We have successfully developed the KASI (Korea Astronomy and Space Science Institute) Solar Imaging Spectrograph (KSIS), which has been originally upgraded from the KASI solar spectrograph that was able to record solar spectra for a given slit region and to inspect the response function of narrow band filters. A prototype KSIS was developed in 2004 by using a scanning mirror in front of the spectrograph slit and a SBIG ST-8XE CCD camera. Its main disadvantage is that it took a long time (about 13 minutes) to scan a whole active region. In this work, we have upgraded the KSIS by installing a much faster Dalsa 1M15 CCD camera, which gives a data acquisition time of about 2.5 minutes. The software for KSIS was also improved for the new CCD camera on the basis of component-based development method. We have successfully made a test observation for a simple and small active region (AR10910) using the improved KSIS system. Our observations show that H-alpha images for several wavelengths have typical features in a sunspot as well as a H-alpha centerline image is quite similar to a BBSO H-alpha image, demonstrating the capability of the KSIS system.