E X E S

Echelon - Cross - Echelle Spectrograph
SOFIA Instruments

news

March 9, 2016
   The EXES equipment is cold in the lab and ready to install March 11 for the SOFIA Cycle 4 flights starting March 14.

March 9, 2016
   The SOFIA Cycle 4 Exes flightplans are now avaliable.

   The flightplans for the EXES March 14-25 flights out of Palmdale are now avaliable. They may be subject to change. Click HERE to see the flightplans.
February 2016
   EXES paper published.

   The EXES paper "A map of D/H on Mars in the thermal infrared using EXES aboard SOFIA" was published in the Astronomy & Astrophysics Journal, Volume 586. Click HERE to see the paper's Astronomy Abstract Service page.
[ click HERE to show older news ]
February 8th, 2016
   SOFIA Cycle 4 observations will start in February 2016.

   10 proposals for EXES were accepted for SOFIA Cycle 4, resulting in a total of 41.5 hours of observing time for EXES. Click HERE to see the SOFIA Cycle 4 proposal results page.
January 8th, 2015
   EXES deployed to Palmdale for commissioning series and 2nd campaign.
October 29th, 2014
June 3rd, 2014
May 23rd, 2014
April 10th, 2014

about about

  EXES is a high-resolution, mid-infrared spectrograph mounted on NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA), the world's largest flying telescope. EXES operates in the 4.5 ‒ 28.3 μm wavelength region, at high (R ≈ 50,000 ‒ 100,000), medium (R ≈ 5000 ‒ 20,000) and low (R ≈ 1000 ‒ 3000) spectral resolution. The instrument uses a 1024x1024 Si:As detector array. High resolution is provided by an echelon ‒ a coarsely-ruled, steeply-blazed aluminum reflection grating ‒ along with an echelle grating to cross-disperse the spectrum. The echelon can be bypassed so that the echelle acts as the sole dispersive element. This results in single order spectra at medium- or low-resolution, depending on the incident angle. Echelon grating cross-dispersed by (or replaced by) an echelle grating gives us Echelon-cross-Echelle Spectrograph or EXES. The combination of EXES's high spectral resolution and SOFIA's access to infrared radiation from space provides an unprecedented ability to study celestial objects at wavelengths unavailable from ground-based telescopes. In particular, high spectral resolution enables the study of molecular hydrogen, water vapor, and methane from sources such as molecular clouds, protoplanetary disks, interstellar shocks, circumstellar shells, and planetary atmospheres.

  EXES is a Principal Investigator class instrument. EXES's Principal Investigator is Dr. Matt Richter of the University of California, Davis. It is not required to contact us before submitting a proposal to SOFIA, but we will be able to improve proposals before submission. All EXES data collection and reduction will be done by the EXES team. It is expected that preparation of results for publication will be a collaboration of General Investigators and the EXES team.

learn more about:

  You can learn more about the EXES instrument, including detailed information about the instrument design, or discover more on NASA's SOFIA project page.

galleries




EXES gallery
EXES front EXES Side SOFIA hanger SOFIA mountians


SOFIA gallery
Radio array


miscellaneous media
Under Construction
Milky Way

team


Principal Investigator

Matt Richter
(UC Davis)

Co-Investigator

Mark McKelvey
(NASA Ames)

Postdoctoral Scientist

Curtis DeWitt
(UC Davis based
at NASA Ames)

Team Member

Kristin Kulas
(Lecturer at Santa
Clara University)

Software Programmer

Mike Case
(UC Davis)

Systems Engineer

Jeffrey Huang
(NASA Ames)

Detector Expert

Robert McMurray
(NASA Ames)

Mechanical Engineer

Jeff Blair
(NASA Ames)


view
team
alumni
Matt Richter Principal Investigator
Matt Richter (UC Davis)
visit Matt's page
Mark McKelvey Co-Investigator
Mark McKelvey (NASA Ames)
Curtis DeWitt Postdoctoral Scientist
Curtis DeWitt (UC Davis based at NASA Ames)
Kristin Kulas Team Member
Kristin Kulas (Lecturer at Santa Clara University)
Mike Case Software Programmer
Mike Case (UC Davis)
Jeffrey Huang Systems Engineer
Jeffrey Huang (NASA Ames)
Mechanical Engineer
Jeff Blair (NASA Ames)
Detector Expert
Robert McMurray (NASA Ames)
Joe Barthel, Kim Ennico-Smith, John Goertz, Tommy Greathouse, Jim Hanratty, Dan Jaffe, Claudia Knez, Andrew Kruger, Mary Kay Hemenway, John Lacy, Dana Lynch, Doug Mar, Margaret Moerchen, Bill Moller, Andreas Seifahrt, Shay Strong, Wanglong Yu, Pete Zell, Qingfeng Zhu