Study 000530: ACRONYM: QUB_HI-CAD_FLARE_4S-EXP_70"x104" This study requires 735 Mbits to run (daily allocation ~ 600). Increased TM allocation (from SOT) should be sought before running this study. This is a fast-raster study designed to support ground-based observations from the DST during Service Mode operations. The study will provide information on plasma dynamics and density changes in the chromosphere during solar flares over a broad range of temperatures. TARGET: Flaring active region EXPOSURE TIME: 4s RASTER: Scanning SLIT: 2" STEP SIZE: 2" FOV: 70"x104" DURATION: 3.5 mins VOLUME: 245 Mbits per 1h for 17 raster repeats (=735 Mbits for 3 hours) LINES: He II, O V (density sensitive pair), O VI, Mg VI, Mg VII (density sensitive pair), Si X, Ca XV (density sensitive pair), Ca XVII, S XIII, Fe VIII, Fe X, Fe XI (density sensitive pair), Fe XII (density sensitive pair), Fe XIII (density sensitive pair), Fe XIV (density sensitive pair), Fe XV, Fe XVI, Fe XVII, Fe XXIII, Fe XXIV POINTING: -------- The Target of Opportunity (ToO) should be a flare-producing active region (sustained C-level activity or greater) as announced by the Max Millennium Chief Observers in their daily messages (see below). The region can be anywhere on the solar disk, although on-disk regions are preferred. INSTRUCTIONS TO PLANNERS: ------------------------- The scheduling of the proposed HOP is determined by the seeing conditions at the Dunn Solar Telescope at the time of the observing campaign, as well as levels of solar activity. Typically, seeing conditions are optimal during the first few hours after sunrise (15:00-18:00 UT). We therefore request that EIS continuously raster over the chosen Target of Opportunity (ToO) during this 3 hour period, without interruptions, whether on the disk or at the limb, whenever the Max Millennium Chief Observers issue an MM#020 DST Service Mode Support email alert. Can also be run during Major/Great Flare Watches. The MM_CO on duty will also contact the EIS_CO ahead of time. We realise that the volume of data generated by EIS during these 3 hours exceeds the daily instrument telemetry allocation. We therefore request that sufficient bandwidth be borrowed from SOT to support this observing campaign. This may mean forgoing other, quiet-Sun studies for the remainder of each day. WARNING: ------- This study requires 735 Mbits to run (daily allocation ~ 600). Increased TM allocation (from SOT) should be sought before running this study.