XRT:
2007-12-28T07:50:00 to 2007-12-30T10:15:00
Science Goal: CORE: SOT continuous magnetic field observations for investigating mechanisms responsible for XBPs and QS dynamics
Program: TI_just_after_OP_Upload
Target:
xcen=-1000000000 ycen=-1000000000
Instrument: XRT
HOP/JOP: 0
Description:
Daily Note: Weekly Meeting Probably last day of HOP15 (4th data set) XRT * Continue flare detection mode. * Support HOP 53 (QS and XBP), if no ARs are present on the disk. * HOP 19 a) Search for fast magnetoacoustic waves in active region loops and b) Loop density measurement (target of opportunity) EIS: * Quiet region near disk center (including HOP53) Continuous tracking for a few days is preferred * TOO: Active region loops near the limb SOT: * HOP15 requires cancelation of synoptic observation for continuous 12 hours observation * HOP53 * TOO: dark filament
Request to XRT HOP Number 0053:
Other Instruments: NONE
Scientific Objectives: Previous magnetic-field observations (/w 1-2 arcsec spatial resolution, longitudinal only) shows that magnetic cancellation is involved in many XBPs and magnetic emergence in a limited number of XBPs (e.g., Harvey et al.) Priest and Parnell (1994) proposed a magnetic canceling model for explaining the overall evolution of XBPs. However, this model has not yet been confirmed with observations. SOT has not yet performed magnetic-field observations suitable for investigating mechanisms responsible for XBPs (see Kotoku et al. 2007 PASJ). The biggest problem in the observations made so far with Hinode is that continuous SOT observations are available only in a few - several hours, which is much shorter than the lifetime of XBPs (8 hrs for small typical XBPs, 48hrs for bigger XBPs) and time-scale of small-scale magnetic field evolution (Schrijver et al. 1998). We are lack of observations with continuous a-few days tracking of a quiet region with Hinode SOT coodinated with XRT and EIS.
