HOP 0286

abstract of observational proposal

Spicules are short-lived radical jets in the chromosphere. De Pontieu et al. (2007) discovered a new type of spicules different from previously known ones, with only upward motion and higher velocity. This special feature has raised much interest as it suggests providing mass and energy to upper solar atmosphere, thus heating the corona. Rouppe van der Voort et al. (2009) identified rapid blueshifted excursions (RBEs) as on-disk counterparts of type II spicules. As the motion of type II spicules is rather complex, it is very important to study with a high-resolution spectrograph in order to understand the formation and dynamics.
We plan to observe with NST, IRIS and Hinode cooperatively to get a whole view from the chromosphere to the corona. We will use Hinode/SP magnetograms to study magnetic evolution related to spicules. We will also study coronal response of related jets using EIS and XRT. Our observation proposal for BBSO/NST during August 14-21 has been accepted. We will also propose for IRIS observation.

ref. De Pontieu, B. et al. 2007, PASJ, 59, 655
Rouppe van der Voort, L. et al. 2009, ApJ, 705, 272

request to EIS

EIS Study 421:‘BP_response1_2raster’ with a 2" slit scan
Exposure time: 20 s
Slit: 2"
Compression: DPCM
FOV: 100" x 128"
Lines: FeX,184.54;FeVIII,185.25;FeXII,186.74;OV,192.90;FeXII,195.12;FeIX,197.86;FeXIII,202.04;
FeXIII,203.82;HeII,256.32;FeXVI,262.98;MgVI,269.00;FeXIV,274.20;FeXV,284.16

other participating instruments

BBSO/NST:
IRIS:
OBS_ID 3620257416 | Medium dense 4-step raster 1x60 4s Si IV Mg II h/k Deep x 4 FUV sp | 21.19 | 19.56 | 0.6 | 5.3+/-0.1 | 21.3+/-0.1 | 0.0+/-0.0 | 10.6+/-0.1 | 10.6+/-0.1 | 0.0+/-0.0

remarks

Time period: Same as ground-based observation time, from 2015/08/17 to 2015/08/19, 3 consecutive days
Time window: 18:00 UT to 21:00 UT every day, in order to cooperate with NST
Interruptions should be avoided or reduced to the minimum
Target of interest: QS both on-disk or near the limb can be target of interest. Specific pointing information will be
given several days before ground-based observation.