SOTSP: HOP 118
2009-05-11T14:35:00 to 2009-05-11T15:36:00
Science Goal: Coordinated Observations with the SHAZAM Magnetograph
Program: Fast map 140x165", 1 side, Q65
Target: Active Region
xcen=-517 ycen=408
Instrument: SOTSP
HOP/JOP: 118
Description:
- HOP 118 - Coordinated Observations with SHAZAM. Disk center for 30 min on first day, observing on-disk AR (farthest W of the two) during other days. Request to SOT HOP Number 0118 NFI Na-D IVDG are requested as ???gground truth???h in the region of study. 4k x 2k, 2x2-summed observations are requested. 60and
#8211
90 second cadence is desirable but not required
as the primary purpose is to compare individual frames with the SHAZAM inversions, and movie collection is only secondary
e.g., 300-600 second time resolution is OK if telemetry is very sparse. SP Normal map of 60" scan width (1-side CCD) is requested once per day if telemetry allows. If telemetry is sparse, then Fast Map is acceptable. Other Instruments: SHAZAM/DST Scientific Objectives: SHAZAM is a high speed / high sensitivity line-of-sight magnetograph based on the principle of stereoscopic spectroscopy. From 7-14 May 2009 the Stereoscopic High-Speed Zeeman Magnetograph (SHAZAM) will be observing at the Dunn Solar Telescope (U.S. National Solar Observatory / Sac Peak). The purpose of SHAZAM is to push the resolution limits of magnetoconvection studies as small as possible. In light of recent results showing that unresolved small scale processes dominate even the smallest features observable with Hinode???fs approximately 0.3???h resolution in Na-D (e.g. Lamb et al. 2008, APJ
Title et al. 2009, proc. Hinode-2) and in fact the energy balance of the entire dynamo (Parnell et al. 2009 APJ), it is imperative to make quantitative measurements of the field evolution at the highest possible spatial resolution. Operating at 617.3 nm at the 70-cm DST, SHAZAM may achieve as high as 0.22???h resolution, collecting 3-10 single-frame magnetograms per second. (Later runs using a blue line at the SST may achieve full 0.1???h resolution). Because SHAZAM uses novel optical principles, it is important to compare results with an instrument that is comparatively well understood and has comparable resolution (Hinode NFI). Hinode/NFI has collaborated with SHAZAM prototype observations before
this is the first SHAZAM observation with a complete instrument (two-polarization, three-camera optical setup).
