The procedure that has been adopted for the processing of the data includes the following stages:
These tasks have been performed in IRIS. The sky removal and optimal addition options within IRIS both seem to give excellent results.
The output from IRIS has had the local sky effects removed but is still dependant on the spectral response of the optical system. To calibrate the spectrum we do the following:
These tasks are performed in Visual Spec. The library spectra are supplied as part of that package. These appear to be from the Pickles catalogue and are normalised with to 550nm (V-Band) to equal a relative flux value of 1.
It is clear that errors could be included at each step in the procedure. It would also be very complex to calculate these individual errors. However, the differences between the different spectra of the same star taken over the course of a number of nights would give us a good idea of the overall accuracy of our results.
So.... If we.....
This could then provide some level of quality assurance for the spectra obtained.
I hope it help you... :)
The elemental composition of the materiel forming the spectrum.
Scientists determined that the object was expanding by analyzing its light spectrum using a spectrograph. By observing the Doppler shift in the spectral lines, scientists could infer the motion of the object relative to Earth, leading to the conclusion that it was moving away and expanding.
An emission spectrograph is used to identify elements present in a sample by measuring the wavelengths of light emitted when the sample is excited. It can be useful in various fields such as chemistry, environmental science, and material science for identifying unknown substances and analyzing their composition.
A spectrograph is a device that separates light from stars and other objects into its different wavelengths to produce a spectrum. This allows astronomers to study the composition, temperature, and other properties of the object emitting the light through analysis of the spectrum.
Aston's mass spectrograph is a magnetic sector mass spectrometer that separates ions based on their mass-to-charge ratio using magnetic and electric fields. Dempster's mass spectrometer is an early design of a mass spectrometer that used electric and magnetic fields to separate ions based on their mass-to-charge ratio. Aston's design was an improvement over Dempster's, offering higher resolution and precision in analyzing isotopic composition.
because they want to
An electromagnetic apparatus for separating isotopes of uranium and other elements according to their masses, using the principle of the mass spectrograph. It lost me at 'mass spectrograph'.
A spectrograph can do that.
The detector in a spectrograph that records spectral lines photographically is a photographic plate or film. This photographic medium captures the light from the spectral lines dispersed by the spectrograph, allowing them to be recorded for analysis and interpretation.
Yes, but not to any precision.
A spectroscope identifies the elements by the color that they give off.
The elemental composition of the materiel forming the spectrum.
A spectrograph breaks down the light from stars into its component colors or wavelengths. Each chemical element absorbs and emits light at specific wavelengths, creating a unique fingerprint called a spectral line. By analyzing the spectral lines in a star's light, scientists can determine its chemical composition.
telescopes, spectrograph's, screw drivers, and lots of Physics!
A spectrograph tells us which colors (wavelengths of light) are in a luminous source.
Doppler shift
... a photonic 'fingerprint'. The picture of a star's spectral lines is its photo-spectrograph.