Study 000613: Updated by M. Whillock, MSSL, 20220624. Copied from study id 0000569, increased exposure time by 50%. Acronym: HPW021VEL260x512v3 *** v2 corrects a bug in the previous version, which was adapted from a 1" slit study and had all of the windows reset to the default of 32 pixels. This version uses a slightly modified line list to overcome this problem. *** A variation on the previous HPW021 studies. This time with the 2" slit, 3" steps, and a 60s exposure time. This study is designed for velocity studies in and around active regions during eclipse season. The primary features of this study are: [1] full slit, [2] relatively deep exposures (60s), and [3] extensive line list. The current thinking is that the Fe VIII 185 and Si VII 275 lines are the best lines for velocity calibration. To accelerate the observing during eclipse season and to conserve telemetry a 3" step is taken between exposures. The raster is also relatively narrow (260"x512") so the duration will fit in between eclipses (just over 1h). TARGET: Active Region EXPOSURE TIME: 60s RASTER: Scanning SLIT: 2" STEP SIZE: 3" FOV: 260"x512" RASTER DURATION: 1h34m11s VOLUME: 122 Mbits RATE: 25 kbits/s COMPRESSION: JPEG85 The primary lines for each data window are: 1 180.40 32 # Fe XI 180.401 2 182.10 32 # Ca XV 181.900, Fe XI 182.167, Fe X 182.310 3 184.33 32 # O VI 184.117, Fe X 184.536 4 185.21 80 # Fe VIII 185.213 186.75 32 # Fe VIII 186.601, Ca XIV 186.610, Fe XII 186.880 5 188.40 48 # Ar XIV 187.964, Fe XI 188.216, Fe XI 188.299, Fe IX 188.497, S XI 188.675 6 192.47 56 # Fe XXIV 192.040, Fe XII 192.394, Fe XI 192.813, Ca XVII 192.858, O V 192.906 7 194.10 40 # Fe X 193.715, Ca XIV 193.874, Ar XIV 194.396 8 195.12 24 # Fe XII 195.119, Fe XII 195.179 9 197.86 24 # Fe IX 197.862 10 201.05 24 # Ca XV 200.972, Fe XIII 201.121 11 202.04 24 # Fe XIII 202.044 12 203.83 24 # Fe XII 203.720, Fe XIII 203.826 13 208.50 32 # Ca XV 208.324, Ca XVI 208.604, Fe XIII 208.679, Ca XV 208.722 14 211.32 24 # Fe XIV 211.316 15 255.00 32 # Fe XVII 254.87, Fe XXIV 255.100 16 256.48 32 # He II 256.317, Si X 256.366, S XIII 256.686 17 258.37 24 # Si X 258.375 18 262.98 24 # Fe XVI 262.984 19 264.30 72 # Fe XXIII 263.760, S X 264.233, Fe XIV 264.787, Fe XVI 265.003 20 270.52 24 # Mg VI 270.394, Fe XIV 270.519 21 275.40 24 # Si VII 275.368, Fe XVII 275.54 22 276.30 40 # Mg VII 276.153, Mg V 276.579 23 278.40 32 # Mg VII 278.402, Si VII 278.445 24 280.39 56 # Mg VII 280.39, O IV 279.933 25 284.16 24 # Al IX 284.015, Fe XV 284.160 Pointing: --------- Adjust the pointing so that there is plenty of quiet Sun at the top OR the bottom of the slit. Instructions to planners: ------------------------- The planner should (not) put the feature of interest in the middle of the slit. Using the bottom or top third will provide more quiet Sun for velocity calibration. Warning: ------- 3" steps are taken between exposures (sparse raster)