Study 000570:

Acronym: Utz_quiet

The main objective of this multi-instrument GREGOR-based proposal is to understand the
coupling between the photosphere and the lower chromosphere of the quiet Sun by investigating
the dynamics of small-scale magnetic fields in the photosphere which lead to the
creation of fibrils and mottles in the lower chromosphere. Understanding the reaction of
the chromosphere to underlying photospheric dynamics has implications for the solar
atmospheric heating problem and stellar atmospheres.
 
Complementary EIS observations will help to understand the caused reaction in the higher
solar atmosphere (transition region and corona) due to the observed small-sale magnetic
field dynamics. Here we are especially interested in brightness increases as tracers of
local heating and caused wave phenomena.

TARGET:           Quiet Sun
EXPOSURE TIME:    60s
RASTER:           Scanning
SLIT:             1"
STEP SIZE:        2"
FOV:              21"x160" 
RASTER DURATION:  11m 54s
VOLUME:           4.5 Mbits
RATE:             6.5 kbits/s
COMPRESSION:      DPCM

Target:
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Quiet Sun with a magnetic pore on the border of the FOV to enable co-alignment between
the various involved instruments. The target region should be slightly off the disc
centre to avoid projections of the fibrils on top of the MBPs (small-scale magnetic
fields in the photosphere), 50 to 100 arcsec off the disc centre. Detailed information
on the target region will be provided a few days in advance as the target region depends
on the actual surface features of the Sun.

Pointing:
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EIS pointing to be advised by Dominik Utz (Dominik.Utz@uni-graz.at) / Peter Gomory CoI
(gomory@ta3.sk) and coordinated with IRIS planner in advance of Hinode daily meeting at
10:30 AM JST.

Instructions to planners:
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1) Coordinated observations with GREGOR, IRIS and EIS from 20th of September until 30th
of September 2017.  Observing window is daily from 9:00 UT to 13:00 UT.

2) Adjust the ** radter repeat ** to fill the required time slot, which is approximately 20

Warning:
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2" steps are taken between exposures, 1" slit (sparse raster)