TNO Time Allocation Committee
... in front of both the white dwarf (in g and KG5) and the M dwarf (in r’ and i’). Unfortunately SDSS J1021+1744 is too faint to be observed using u’ filter at TNT, although it is very desirable to obtain some at shorter wavelengths. The 8’x8’ field of view of ULTRASPEC will allow us to monitor our tar ...
... in front of both the white dwarf (in g and KG5) and the M dwarf (in r’ and i’). Unfortunately SDSS J1021+1744 is too faint to be observed using u’ filter at TNT, although it is very desirable to obtain some at shorter wavelengths. The 8’x8’ field of view of ULTRASPEC will allow us to monitor our tar ...
ALFALFA H-alpha: The Star-Formation-Rate Density
... atmosphere absorbs few photons in the optical wavelengths, making them the easiest to observe. The SFR is not directly linked to broadband fluxes so followup, narrow-band imaging is required for its determination. Narrow-band imaging is too time-consuming to be used for surveying. This restriction f ...
... atmosphere absorbs few photons in the optical wavelengths, making them the easiest to observe. The SFR is not directly linked to broadband fluxes so followup, narrow-band imaging is required for its determination. Narrow-band imaging is too time-consuming to be used for surveying. This restriction f ...
ESA BR-170 - ESA Science
... describes them as “electrifying”: they revealed ten objects that were completely invisible to other existing telescopes, which merely detected visible (optical) light. This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what ...
... describes them as “electrifying”: they revealed ten objects that were completely invisible to other existing telescopes, which merely detected visible (optical) light. This raised an unsettling question: if a first look at the infrared sky had yielded about ten new, odd, infraredbright objects, what ...
6 The mysterious universe
... nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen with the naked eye. The collapse continues under the influence of gravity, forming visible globules in ...
... nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen with the naked eye. The collapse continues under the influence of gravity, forming visible globules in ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... although this is not a major consideration for our Kn data as the photon shot noise from the sky exceeds the readout noise. The J observations were made using a 'non-destructive readout mode' (NDR), in which the signal is sampled regularly at a selected rate during the exposure. The NDR measurements ...
... although this is not a major consideration for our Kn data as the photon shot noise from the sky exceeds the readout noise. The J observations were made using a 'non-destructive readout mode' (NDR), in which the signal is sampled regularly at a selected rate during the exposure. The NDR measurements ...
copyright 2002 scientific american, inc.
... through binoculars, it turned out to be the most brilliant explosion ever witnessed by humanity. We could see it nine billion light-years away, more than halfway across the observable universe. If the event had instead taken place a few thousand light-years away, it would have been as bright as the ...
... through binoculars, it turned out to be the most brilliant explosion ever witnessed by humanity. We could see it nine billion light-years away, more than halfway across the observable universe. If the event had instead taken place a few thousand light-years away, it would have been as bright as the ...
JMAPS
... support for M2, with minimal stray light effects. There are three powered elements and six fold flats that are used to contain the 3.8 m effective focal length in a volume that is approximately 25” along the long axis. The system includes a rotating filter wheel with four positions. The first positi ...
... support for M2, with minimal stray light effects. There are three powered elements and six fold flats that are used to contain the 3.8 m effective focal length in a volume that is approximately 25” along the long axis. The system includes a rotating filter wheel with four positions. The first positi ...
WORD - Astrophysics
... observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that explain the existence of some of the most exotic states of matter in the Universe: n ...
... observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that explain the existence of some of the most exotic states of matter in the Universe: n ...
comet panstarrs
... night sky. The brightening trend continues to speed up so that by mid-February, Comet PANSTARRS should be an unaided eye “fuzzy” located in the vicinity of the southern constellation of Microscopium. As it dives toward the Sun, it will move into the constellation of Pisces, easily visible in the S ...
... night sky. The brightening trend continues to speed up so that by mid-February, Comet PANSTARRS should be an unaided eye “fuzzy” located in the vicinity of the southern constellation of Microscopium. As it dives toward the Sun, it will move into the constellation of Pisces, easily visible in the S ...
Astrophotography
Astrophotography is a specialized type of photography for recording images of astronomical objects and large areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum light photons over these long periods of time. Photography revolutionized the field of professional astronomical research, with long time exposures recording hundreds of thousands of new stars and nebulae that were invisible to the human eye, leading to specialized and ever larger optical telescopes that were essentially big cameras designed to collect light to be recorded on film. Direct astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with film (and later astronomical CCD cameras) becoming just one of many forms of sensor.Astrophotography is a large sub-discipline in amateur astronomy where it is usually used to record aesthetically pleasing images, rather than for scientific research, with a whole range of equipment and techniques dedicated to the activity.