Subject: Re: HIGH CADENCE IMAGING CAMPAIGN Date: Mon, 15 Apr 2002 15:34:07 +0900 (JST) From: Yoichiro Hanaoka To: canfield@mithra.physics.montana.edu CC: obs_info@corona.mtk.nao.ac.jp Dear Canfield-san, We have started high-cadence observations in H-alpha with a new digital-camera system, which was installed in the Solar Flare Telescope at Mitaka, NAOJ. H-alpha images are taken with a 0.5 s cadence throughout the observation, but the data only during flares (automatically detected) are cut out and recorded on CD-R's. Low cadence data with a 30 s cadence are taken in parallel, and we keep all of them as context data. 1. Field of view: 6.4x4.9 arcmin. 2. Spectral bandpass: H-alpha center, 0.25 A bandpass. 3. UT time range: roughly 0000-0700 UT. 4/5. The Solar Flare Telescope is operated every day regularly. Usually the observing target is selected by a duty tohban, but he will change the target to the other region at any time by request. Quick-look images, observation logs, and flare lists are open on the web page of the Division of Solar Physics, NAOJ (http://solarwww.mtk.nao.ac.jp/en/database.html). Best wishes, Yoichiro Hanaoka hanaoka@solar.mtk.nao.ac.jp National Astronomical Observatory of Japan