UVCS MISSION LOG ---------------- Date: 04 October 2005 ----- Last revision: 26 October 2005 (Wu) -------------- File Name: 2005.10.05.a.log ---------- Compiled by: R. Wu ------------ UVCS Activity: Flush and Abort Streamer Study for 04 - 05 October 2005 -------------- Load and Start JOP 175 Observation of Extended Filaments at the Limb for 05 - 06 October 2005 Load JOP 175 Observation of Extended Filaments at the Limb for 06 October 2005 SOHO Activity: -------------- EOF Staff: J. Raymond: Lead Scientist ---------- R. Wu: Commander M. Uzzo: Planner Y.-K. Ko Command file: 05.10.03.20:09:00.cmd.log Activity: --------- 1) Extended Filaments at the Limb Sequence: 05.09_StrObs.tcl, sw = 1 SCI_SPEC: From JOP Description found at the following URL: http://soho.nascom.nasa.gov/soc/JOPs/jop175.txt Note: Some information may be obsolete. Draft received 19 February 2004. SOC added UVCS details & POC 23 February 2004. SCIENTIFIC GOALS: (1) To relate the magnetic field morphology of an erupting filament to the structure observed as the white-light CME; (2) Does the fluxrope exist prior to the eruption? REQUESTED OBSERVATIONS: Target-of-opportunity. Long, non-active region, filament during West limb transit (e.g., polar crown, although any extended filament will suffice) -EIT (304A in CME watch mode, full-frame) -TRACE (195A CME watch mode, framed as 02Jun1998 EIT example) -LASCO synoptic mode -UVCS (C III, O VI and Ly beta) Others? POINTS-OF-CONTACT: St. Cyr, Schrijver, Gurman, J. Raymond SCIENTIFIC RATIONALE: Attached is a partial frame EIT 195 image from the June 2, 1998 eruption of the south polar crown filament eruption. Plunkett et al (2000, SolPhys, 194,371-391) described this event and demonstrated that the "cusp" or concave-out shape above the filament was visible for many hours in EIT before the eruption. The cusp appears to be the concave-outward portion of the form we call a fluxrope in LASCO CMEs. We are aware of a few more of these pre-eruption shapes above filaments, but the EIT temporal resolution (and the geometry?) is typically not sufficient to determine when the cusp appears above the prominence. OBS_PROG: Primary: Sub Obj: SCI_OBJ: Primary: Sub Obj: OBJ: Streamer CMP_NAME: JOP 175, Extended Filaments at the Limb, LASCO; EIT; UVCS; TRACE(S/C) CMP_NUM: 7135 Duration: start: 2005.10.05.16:18 end: 2005.10.06.10:35 ONUMs = 21781 (320 exps) 21782 (80 exps) 21783 (80 exps) 21784 (8 exps) 21785 (40 exps) Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 0 Degrees - Roll: 48 Degrees (27510) - Mirror/Occulter: 1.75 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 150, 50 um - LYA GRTPOS: 100000 - OVI GRTPOS: 232100, 86600, 67500, 164600, 223500 - OVI MCP Voltage: 200 - OVI mask: OVI_str_164_225 in slot 6 msk_000303_OVI in slot 3 Fits Files: q05.10.05.16:16:44.ovi.dat q05.10.06.03:19:04.ovi.dat q05.10.06.06:06:32.ovi.dat q05.10.06.08:53:57.ovi.dat q05.10.06.09:11:39.ovi.dat