Data products and access

Page in construction ; Last Update December 2024

Currently, THEMIS provides 4 type of data products:

• Full disk guider images
• Context camera (broad band imager)
• Slitjaw camera
• Spectral cameras (with or without polarimetry)

Their production is explained on the THEMIS technical information page, with some information of the light path leading to these items and the possible options available to the users.

• Context camera (broad band imager)

Natural image without AO, with AO, with AO and post-facto reconstruction

Planetary configuration (Mercury)                         Solar configuration                         Field scanning example (with AO)                 Scan over Mercury (100Hz stabilization)

The MTR observation mode allows multi-line spectro-polarimetric observations. The available spectral cameras allows for simultaneous observation of a combination of up to 6 wavelengths. However observers usually limits their analysis to 3-4 wavelength. Available wavelengths are currently in the range [430-870] nm. Available combinations of wavelength depends on the actual position of the diffracted spectra at the exit of the spectrograph. The polarimeter is optimized for 6250Å and 4250Å.

For non polarized observations, for each channel, at each time, the dataset consists 2D image, with a variable wavelength across the field of view in one direction, and the spatial direction along the slit in the other directions. Each channel is centered on a different wavelength across the line profile.

Datas examples :

The full archive until 2014 is stored on DLT tapes at the telescope. We do have a functionnal tape reader but no usable software to run it.
We maintain an incomplete archive of years 2009, 2010, 2012, 2013, 2014 on HDDs. Listing of what's available:

• 2009, 2010
• 2012 to 14

• THEMIS fits headers log (alpha version unmaintained)
• Themis daily log (Old version, obsoleted)
• BASS 2000 (Tarbes) Portal
• BASS 2000 (Tarbes) Solar data query page
• Astrosurf solar spectrum

• BASS 2000 (Paris Observatory)

• The Sun Today (LMSAL)
• Solar Monitor Org
• Helioviewer web app (Nasa)

• NASA VSO “Virtual Solar Observatory”

• Soteria OSEC
• Soteria SODA “SOTERIA Data Archive, it is a virtual observatory and is supposed to make data location & access as easy as using Google.”

• HELIO notice “Heliophysics Integrated Observatory”
• HELIO front End

• "In the sky" (3d solar system and sky objects)

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