HOP 0072

HINODE Operation Plan (HOP)

accepted on

24-Jul-08

HOP No.

HOP title

HOP 0072

Radiative structure of small magnetic elements: faculae, network and inter network in the quiet Sun

abstract of observational proposal

The smallest magnetic features in the solar photosphere are the G-band bright points. It is fundamental to study their structure and size, as they are in the resolution limit,and can appear as points or unresolved features (Ishiwawa et al 2007, Berger et al 2004). We intend to study them at maximum spatial resolution in intensity and magnetic field at several wavelengths to determine their dimensional and thermal structure. Observations in G-band (=430.5nm), CaII(=396.9nm), CN(=388.35nm) as well as magnetograms: MgIb(=517.27nm), FeI(=517.27nm) and NaID(=589.6nm are proposed in this document.

request to SOT

Obtain SOT filtergrams from the Broad band Filter Imager(BFI): G-band, CNI, CaIIH, Blue and Red continuum in this priority order, at the best possible conditions (highcadence,binning 1x1, etc). Since one of the scientific objectives is to study bright points, a cadence of about 20seconds(in accordance with the current telemetry restrictions) would be fine.

Obtain SOT magnetograms (Stokes parameters I, V)from Narrow band Filter Imager (NFI) on wavelengths: NaID,MgI or FeI.

SP: Obtain magnetograms or spectropolarimetric maps in ”Fast Map”mode, if possible at or near the sametime as the filtergrams. As the previous case,we would like to get the best possible conditions. This would be the last instrumental priority.

If the SP cannot be operated simultaneously with the BFI,the SP maps could be obtained during one hour before or after the main BFI operation described above.