JOP 123, Narrow band photometry of EUV emission lines 

Coordinated campaign with TRACE , SOHO, and the Tuneable X-Ray Imager Rocket

Received 14 April 2000
Revised  27 April 2001

DeLuca,E.E., Golub, L., Reeves, K.  and Warren, H.

AIM:  Very narrow band photometry of full disk in the 171-204A region

The TXI rocket is scheduled for launch on June 26 2000. The TXI
consists of a 6" diameter prime focus telescope fed by a pair of flat,
parallel mirrors. The multi-layer coatings are chosen so that a narrow
(3A FWHM) passband can be scanned across the 171-211A spectral
region. The telescope views the full Sun with 1"/pixel resolution on a
2kx2k CCD. The primary science goals for the TXI are:

 Temperature and Emission Measure diagnostics from Fe: IX, X, XI,
 XII, XIII and XXIV emission lines and 
 velocity observations around the Fe XI 180A line.
 
The rocket will also fly three small (3") prime focus mirrors covering 
the broadband coating 171-211, 193 Fe XII and 211A FeXIV.

All of the telescopes will be fully calibrated.
__________

Plan

Yohkoh: full disk images or partial frame images of brightest region

TRACE: Center a (768x768) FOV on a bright AR and take 171, 195 and
some UV images before and after the launch window, take rapid 195 
observations for about 2 hours covering the launch window. 

Limb regions may be preferred because of eclipse coodination; if there
is an exciting AR on the disk we may want to move TRACE there.

Rocket will adjust launch time to avoid TRACE SAA.

MDI: Would like a full disk magnetograms during or near the flight.

CDS: A 4x4 arcminute raster with good spectral information, expected 
cadence ~15 minutes. TRACE and CDS will coordinate on the region.

EIT: full disk images in 304, 171 and 195 during rocket flight.

Sumer: Unavailable?

=========================

The TXI Observing Plan

t_start (sec)   |   wavelength/ion      |   t_exp
____________________________________________________

t_0 + 100               174.5/Fe X           10
      113               171.1/Fe IX           3
      119                 "                  10
      132               174.5                10
      145                 "                   3
      151                 "                  30
      184               178.4/Fe XI-2A       10
      197               180.4/Fe XI           3
      203                 "                  10
      216                 "                  30
      249               182.4/Fe XI+2A       10
      262               192.4/Fe XXIV        10
      275               193.5/Fe XII          3
      281                 "                  10
      294                 "                  30
      327               195.1/Fe XII         10
      340               202.0/Fe XIII        10 (density-
      353               203.8/Fe XIII        10  pair)
      366                 "                  30
      399               193.5                10
      412               180.4                10
      425               174.5                10
      438                 "                  10
      451                 "                  10 (rpt to end)
      
==============================================================
 
The 3-mirror side will cycle through sets of 3,10,30 second exposures
with each mirror.