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HINODE Operation Plan (HOP)

accepted on

18-sep-07 rev 1-Nov-07

 HOP No.

 HOP title

HOP 0043

SUMER campaign - Spectral Observations of Spicule Dynamics

plan term


@ @


 name : K. Reardon, Teriaca, Sterling, Carlsson, Hansteen, Curdt @  e-mail : kreardon[at]arcetri.astro.it

contact person in HINODE team

 name : J. L. Culhane @  e-mail : jlc[at]mssl.ucl.ac.uk

 abstract of observational proposal
The goal of the proposed JOP is to study the dynamics and evolution of
spicules with spectrally resolved observations at multiple wavelengths,
from the visible to the vacuum ultraviolet (VUV).

With the observations in chromospheric lines at visible wavelengths we
plan to determine velocities, both transversal and longitudinal, which
will allow us to characterize the behavior of the "classical" spicules.
In addition, rapid cadence imaging will permit the study of their
evolution on a variety of time scales. This information will allow us
to better quantify the energetics of the spicule phenomena.

Spicular structures are also commonly observed in VUV lines formed at
temperatures up to the transition region. Simultaneous observations in
VUV spectral lines will clarify the relationship between VUV and
classical spicules and determine the plasma dynamics up to coronal

 request to SOT
H-alpha Doppler at +-0.8 Ang, with Ca II H interspersed. Cadence should be
approximately 12 s for a set of three images, i.e., about 4 s between images.
We can narrow the SOT FOV somewhat, so that we can maintain this cadence for at
least one hour at a time.  (Science-wise acceptable FOV would be similar to
that ran by SOT with H-alpha Dopper on 27 Sep 2007, around 15:00.)  Exposure
times should be long: 600 ms for Ca, >400 ms for H-alpha. During periods when
telemetry does not allow us to maintain such a high cadence, we would like Ca
II H filtergrams at a lower cadence.  We may switch the H-alpha Dopplergrams to
+-0.41 Ang during runs later in the campaign period.

 request to XRT
Images in Thin Al-Poly or Ti-Poly at about 15s cadence over a 150"x
150" FOV.

 request to EIS
Spectroheliograms in selected lines.
The target will be chosen several days before the observations based on
the structures present on the solar disk. We will avoid locations of
active regions near the limb; During coordination with SUMER, we will
chose a target region located close to the equator.

 other participating instruments

With SUMER, we plan to obtain time series of observations with a fixed
slit placed tangential to the limb near the equator.

Imaging spectral scans of the Ca II 8542 and/or H-alpha lines with an
approximately 10-20 second cadence. The IBIS field of view will be
80x40 arcseconds.

Images in the 155 nm band at 15 s cadence. Full resolution over a FOV of
about 150"x150". Pairs of images at 160 and 170 nm whenever possible.

The ground-based observations from the NSO/Dunn Solar Telescope will be
focused on the hours 15:00-18:00 UT. Because of the fundamental role
of IBIS in achieving the proposed science goals, we request the
coordinated observations during this time frame.

The observing time at the NSO/DST has been assigned in the period
02-11 November, 2007. Coordinated observations should be obtained
for as much of this period as possible

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