Their observing program is now completed by new observations with the more accurate HARPS-N spectrograph
Used with a spectrograph
, the frequency comb can act like a very precise ruler to calibrate and track the exact colours in the star's fingerprint and detect any periodic variations.
During the eleven-day mission, astronauts will install the Ball Aerospace-built Cosmic Origins Spectrograph
(COS) and the Wide Field Camera 3 (WFC3); and upgrade two critical Ball instruments: the Space Telescope Imaging Spectrograph
(STIS), installed in 1997; and the Advanced Camera for Surveys (ACS), installed during the 2002 servicing mission.
The fibers shunt the light into the spectrographs
, which on a clear night map the position of hundreds of galaxies in a single hour.
Washington, Oct 26 (ANI): Two scientists including an Indian-origin have developed a new smaller spectrograph
that could let diabetics monitor blood sugar levels without piercing fingers several times daily.
Ball Aerospace built the Cosmic Origins Spectrograph
(COS) and the Wide Field Camera 3 (WFC3), both of which will be installed by shuttle astronauts during the 2008 servicing mission.
Using the low-resolution spectrograph
on the Keck telescopes, Nicole P.
Lotfi Ben Jaffel and Alfred Vidal-Madjar of the Institute of Astrophysics of Paris and their colleagues used the Hubble Space Telescope's Goddard high-resolution spectrograph
to measure the ratio of deuterium to hydrogen in Jupiter's atmosphere.
Solar panels, which power the craft, had degraded, and the damage wrought by 18 years of exposure to ultraviolet radiation in space had steadily heated the IUE's spectrograph
, posing problems for electronic devices.
Astronauts are scheduled to replace Hubble's spectrographs
next February with a device that can simultaneously record images and spectra.
The new telescope features three spectrographs
, each with special capabilities.
This requires an exposure lasting tens of hours with one of the telescope's present spectrographs
or a wait of several years until an improved spectrograph
is delivered to the telescope in the next servicing mission.