HOP 0061

HINODE Operation Plan (HOP)

accepted on

19-dec-07

HOP No.

HOP title

HOP 0061

CORE: Long Duration Studies of Equatorial Coronal Holes

plan term

2008/01/04-2008/01/08
2008/01/10-2008/01/15
2008/01/17-2008/01/21
2008/02/01-2008/02/28

contact person in HINODE team

name :

Savcheva

e-mail :

asavchev[at]cfa.harvard.edu

abstract of observational proposal

This is a follow-on study to the investigations of Jets in polar coronal holes. We propose to follow low latitude coronal holes from near disk center to the west limb. Combined SOT, XRT and EIS observations are needed near disk center to accurately measure the magnetic field evolution that leads to coronal jets and (with luck) the line-of-sight velocity of the jets in several lines. Following the CH from the disk to the limb will allow for detail comparison with the polar jets and at the limb. We will have joint observations with SOHO UVCS.

A primary goal is to observe to observe the jet from initiation through decay in all three Hinode instruments.

request to SOT

SP magnetograms with high sensitivity to weak magnetic fields. Context images that will allow for alignment between SOT, EIS and XRT. While pointed at the limb, we also request Ca IIH images at no less than 30 sec cadence.

request to XRT

The thermal and velocity structure of the jets are key. We will need sufficient counts to develop statistics, so maybe a short (50”) sparse raster with the 2” slit would be useful. We suggest 30--45 sec exposures.

remarks

Two observation periods are being considered:
Target 1 Jan 04.88-08.67 (meridian and disk)
Target 1 Jan 11.70-15.49 (West Limb)
Target 2 Jan 10.49-14.28 (meridian and disk)
Target 2 Jan 17.31-21.10 (West Limb)

We are requesting four days of observation on the disk (~12hr/day) and four days of observation at the limb (~ 12hr/day). Standard synoptic and engineering data can be taken during this program.