HOP 0056

HINODE Operation Plan (HOP)

accepted on

19-dec-07

HOP No.

HOP title

HOP 0056

CORE/TOO: Quiescent Prominence Structure and Dynamics Study

abstract of observational proposal

The primary requirements for observing the plumes are highest possible spatial and temporal resolution. For SOT, 2x2 summing (0.108 arcsecond pixels) suffices to resolve the plumes. Typical SOT cadence values used for past plume observations is 15―30 sec. Both EIS and TRACE see prominences in EUV absorption. Since the plumes are at the resolution limit of TRACE, unless they are bright in the 171Å or 195Å they will not be visible. For EIS, the plumes may be visible if they are bright or if they are seen in absorption against EUV loops in the background. EIS cadence should not exceed 30 seconds or the plumes may be too blurred by motion to be definable.

request to XRT

SOT Filament Study details: On-disk filament program 1: FG: BFI: Ca II H-line 2k x 2k, 2x2 sum, 200 msec exposure, Q90 NFI: Hα line center 2k x 2k, 2x2 sum, 250 msec exposure, Q90 Cadence = 30 sec SP: repeated Fast map of PIL region On-disk filament program 2: FG: BFI: Ca II H-line 2k x 2k, 2x2 sum, 200 msec exposure, Q90 NFI: Na ID IVDG mode, 2k x 2k, 2x2 sum, 120 msec exposure, I:Q90 Cadence = 30 sec SP: repeated Fast Map of PIL region

SOT Prominence Study details: Limb Prominence program 1: FG only BFI: Ca II H-line, 2k x 2k, 2x2 sum, 500 msec exposure, Q90 NFI: Hα ±208mA DG, 1408x1408, 2x2 sum, 500 msec exp, Q90 Cadence = 20 seconds Limb Prominence program 2: FG only BFI: Ca II H-line, 2k x 2k, 2x2 sum, 500 msec exposure, Q90 NFI: Na ID line Shuttered IQUV, Q95 Cadence = 30 seconds This is an experimental program to look for linear polarization signals in prominences to be used for possible Hanle effect measurements.

request to EIS

The new slot movie with cool line windows is requested for this program (IUU_Slot_148_400). For the on-disk filament observations, the slot should be positioned to center on the filament. For the limb observations, the slot should be positioned to traverse as much of the central sheet as possible. Only one raster position is requested so that a cadence of ~15 seconds can be achieved.

remarks

Target: Since the geometry of plume-forming prominences is not understood relative to the appearance of the polar crown filaments seen on the disk, we request a three-day observing period in which a large polar crown filament is followed to its West limb apparition. Following the appearance on the West limb, fixed pointing is required. Ideally the prominence will be a large sheet or ‘hedgerow’ prominence with the sheet perpendicular to the line-of-sight. This is obviously a Target-of-Opportunity (TOO) program. We do not require 24-hour monitoring of the target; 4 hours per day is sufficient.

Duration: The daily observation should be in the SAA-free period near start of OP and last for at least 4 hours. This duration is driven by the episodic nature of the plumes – there are sometimes 1―2 hours in which plumes are not seen in a given prominence followed by bursts of activity.