HOP list   Monthly Events

HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0126

CORE: Chromospheric Jets

plan term


@ @


 name : De Pontieu @  e-mail : bdp[at]lmsal.com

contact person in HINODE team

 name : De Pontieu @  e-mail : bdp[at]lmsal.com

 abstract of observational proposal
The goal is to investigate the physics of the disk counterparts of type II spicules through coordinated observations with Hinode and SST (and TRACE, if available). Using Ca 8542 and H-alpha spectra from CRISP, we have recently identified high velocity jets that are similar to type II spicules observed in Ca H with Hinode at the limb. We want to determine the formation mechanism and thermodynamic (heating) and dynamic (Doppler and projected velocity) properties of these chromospheric jets. We also want to get statistics on transversal motions.

We will try to achieve these goals through simultaneous, very high resolution, high cadence observations from the Swedish Solar Telescope (SST) with a broadband Ca-H filter (core), as well as CRISP FPI observations in the Ca 8542 and H-alpha lines.

In addition, we would like to ask for H-alpha blue wing images at high cadence and Na D magnetograms and Dopplergrams from Hinode SOT (to study the effect of magnetic fields on the formation mechanism), and a fast raster in various lines with EIS (to study the thermal evolution).

For targeting, we will focus on AR plage, quiet Sun and equatorial coronal holes. Best chances of good seeing are UT 8:30-11:30.

 request to SOT
Context programs:
 SP:  fast map large enough to cover the AR, perhaps 123x123 or 164x164 arcsec, avoiding SAA
 NFI: Program 0x3b4   AR mode case2 (Large), G-band 120min, Na IV 5min, Ca H 5min, during the SP map

High-cadence programs:    NFI: Program 03bd  H-alpha sequence:  H-alpha at -2.1A, at -1.28A and -0.87A, 112"x112", 2x2 summed, at 13 s cadence, and Na D IVDG every 5 minutes, same FOV
 SP : Program 0xed   fast raster (dynamics), 4.8"x60" at 1 min cadence

The NFI high cadence program should run for the prime observing time in La Palma, 2-3 hours depending on telemetry. The SP high cadence should run for 30 minutes in the middle of this period (avoiding SAA).

The context programs should run once before the high cadence observing begins and again once after it ends.

The CT should cycle off/on before the start of each of the SP programs.

 request to XRT

 request to EIS
EIS study 435 (VHH_SlowARbig_1h23), which rasters a 300"x296" region  with 30s exposure time for a range of lines that allow study of line  asymmetries for a range of temperatures. Many of these lines have been  selected to allow clean measurements of the blueward asymmetries  associated with the upflow events (i.e., no known blends, or weak  blends).

EIS study 436 (VHH_HI_BRT_SCAN_EXT), which rasters a 16"x240" region  with 25s exposure time for the same lines as the large raster.

EIS study 434 (VHH_SlowAR_SaS_1h6m), which does a sit and stare, 30 s  exposure time, with the 2 arcsec slit with a slit lenght of 296 arcsec  using the same line list as above.

EIS study 435 should be run before or after (or ideally before and  after) the high cadence SOT-NFI/SP program. Volume 77 Mbits. Duration  1h 24m.

EIS study 436 should be run simultaneously, and co-pointed with the  high cadence SOT-NFI/SP program. This should be run for 1 hour  minimum. Volume 5.6 Mbits/raster scan. Each scan takes 4m 8s.

If requested these studies should be complemented with EIS study 434.  Volume 106 Mbits. Duration 1h 7m.

 other participating instruments
SST: Ca-H, Ca 8542, H alpha
TRACE: TRACE 1600 every half hour, TRACE 195 every minute (if operating, for context and coalignment)

Time period of observations:
* Start date: Sep 13, 2010 ; End date: Sep 25, 2010, LMSAL SST campaign.  Try to observe on Sep 12 also if telemetry permits. The period 21-15 September overlaps with HOP 166 (Tenerife).

Time window in day:
* Minimum duration: 2 hour, but preferably 3 hours telemetry permitting:
Time of best seeing:  Start 8:30 UT, End 11 UT (TBC)
Note that the button should be checked to "Resume the FG program after Table Load" if the table load pass occurs during this time interval.

Target of interest: If available, AR plage on the disk at any position; otherwise quiet Sun and equatorial coronal holes at disk center.

Ted Tarbell wrote:
It asks for a minimum of 5 days support (more if possible), not necessarily continuous; and 4 hours per day from EIS, 2 hours from SOT.  Like other ground-based HOPs, it wants fairly high priority until some good data is obtained at La Palma, then priority can drop down.

HOP list   Monthly Events