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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0227

On-Disk Observations of Jet Features

plan term


@ @


 name : Moore, Sterling, Yurchyshyn @  e-mail : ron.moore[at]nasa.gov

contact person in HINODE team

 name : Sterling @  e-mail : alphonse.sterling[at]nasa.gov

 abstract of observational proposal
Our objective is to search for magnetic structure at the base of spicules or spicule-like features, including rabid blue-shifted events (RBEs). Specifically,  we will look for evidence of bipolar or transient horizontal fields at the bases of on-disk spicule-like features, as suggested by, e.g., Moore et al. (1977; ApJ 218, 286), Sterling et al. (2010, 722, 1644), and Moore et al. (2011; ApJL, 731, 4).  This will require high-resolution vector magnetic field data, and high-cadence blue-wing H-alpha for the suspected spicule on-disk counterparts.  The target location is to be  an on-disk coronal hole or quiet Sun.

In addition, will look for on-disk X-ray jets with XRT, and inspect their magnetic source regions from FG and HMI line-of-sight data.

EIS slot movie data will be used to facilitate co-alignment with SDO/AIA images.
Some runs of the HOP will be done con-currently with ground-based observations from BBSO.  The HOP however can run independently of ground-based support.

 request to SOT
We request blue-wing H-alpha at high cadence, of a coronal hole or quiet region near disk center.  SP has to be 10-min cadence; need the horizontal field, and so SP is necessary.

SP:  High-cadence SP scans of about 10 min is required.  The width of the scan can be adjusted as necessary to maintain cadence.  The suggested SP program is:

o Normal maps
o Half the slit length (0.5*164'' = 82'')
o Slit step width: 0.16''
o Integration time and slit width is to be one of three combinations: (a) 4.8 sec and 10'',
 (b) 9.6 sec with 5'' width, or (c) 14.4 sec with 2.5''.

FG: Ideally prefer blue-wing H-alpha images of high cadence (~5-10 sec), in the far blue wing of H-alpha with the narrow-band filter band centered at -1.0 Angstrom from H-alpha line center, in order to detect RBEs.  If the COs choose to use only one side of the SOT FOV, than that FOV should overlap that of the SP slit coverage.

If H-alpha is not available, Ca images can be taken over as large a FOV as possible. In this case, the objective will be to attempt to match Ca features with ground-based H-alpha features, or with AIA EUV features.  Binning of 1x1 or 2x2,  with exposure times appropriate for the region being imaged (QS or CH).

FG magnetic images should be included at low cadence [~2 min?] for context and
for use in alignment, if possible.

 request to XRT
Relatively high cadence observations in preferably two low-temperature filters,
384 x 384 FOV is fine.

 request to EIS
Quiet Sun slot movies (e.g., IUU_SLOT_104x512_Q85).

 other participating instruments
BBSO may participate during some runs of the HOP.

BBSO support will not be available prior to summer 2013.  We would like at least one run without BBSO prior to that.  For the first run, we request three one-hour sequences, one with each of the three SP integration-time/slit-width combinations.

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