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A calibrator star is a star that is typically used for calibration purposes on high-sensitized sensors located on space telescopes.
Calibrator stars do not usually follow a specific criteria, but are normally hand-picked for different reasons.
A calibrator star is a star that is typically used for calibration purposes on high-sensitized sensors located on space telescopes.
Calibrator stars do not usually follow a specific criteria, but are normally hand-picked for different reasons.
Definition
Infrared and optically bright stars may be observed for calibration purposes by satellites, particularly those with sensitivity to both infrared and visible radiation. The stars chosen generally meet the following criteria: they have a visual magnitude that is equal to or less than +6, and an IR brightness (in the 1-5 micrometer range) greater than that ofVega
Vega is the brightest star in the northern constellation of Lyra. It has the Bayer designation α Lyrae, which is Latinised to Alpha Lyrae and abbreviated Alpha Lyr or α Lyr. This star is relatively close at only from the Sun, and ...
.
The stars are strictly southern objects (i.e., their declinations are negative), and most are cool stars of spectral classes K and M. While these are not the only stars that might serve for these purposes, they are well distributed across the southern sky and some should be visible at all times.
List
Catalog
A catalog of recommended calibrator stars does exist, with 1,510 stars being listed. The catalog gives the magnitude, mass and other statistics.See also
*Lists of stars
The following are lists of stars. Stars are astronomical objects that spend some portion of their existence generating energy through thermonuclear fusion.
By location
* Lists of stars by constellation
By name
* List of proper names of stars
* ...
* First light (astronomy)
In astronomy, first light is the first use of a telescope (or, in general, a new instrument) to take an astronomical image after it has been constructed. This is often not the first viewing using the telescope; optical tests will probably have ...
References
{{Reflist Stars Astronomical spectroscopy Astrometry Space telescopes