AST301.Ch22.NeutGammBH - University of Texas Astronomy
... Fig.22.13) flashes of gamma ray light. Until about 1995, no one knew what they could be or where located—solar system? Nearby stellar event flare? Need distance to get brightness (luminosity). First indication: they are distributed isotropically in the sky (no preferred direction, like the plane of ...
... Fig.22.13) flashes of gamma ray light. Until about 1995, no one knew what they could be or where located—solar system? Nearby stellar event flare? Need distance to get brightness (luminosity). First indication: they are distributed isotropically in the sky (no preferred direction, like the plane of ...
Recen t Scien ti c
... 1. INTRODUCTION The Chandra X-ray Observatory was launched into orbit on July 23, 1999 aboard the Space Shuttle Columbia (SST-93) and reached it operating orbit (10,000 x 140,000 km) about two weeks later. After systems activation and checkout the rst X-rays were observed on August 12, 1999 heraldi ...
... 1. INTRODUCTION The Chandra X-ray Observatory was launched into orbit on July 23, 1999 aboard the Space Shuttle Columbia (SST-93) and reached it operating orbit (10,000 x 140,000 km) about two weeks later. After systems activation and checkout the rst X-rays were observed on August 12, 1999 heraldi ...
What happens close to a black hole?
... coded aperture mask; A eff ≈ 30 cm2 (each); 2-20 keV. 5. UVIT : Ultraviolet Imaging Telescope (UVIT) two telescopes each with 38 cm aperture; near-uv , far-uv and visible bands. ...
... coded aperture mask; A eff ≈ 30 cm2 (each); 2-20 keV. 5. UVIT : Ultraviolet Imaging Telescope (UVIT) two telescopes each with 38 cm aperture; near-uv , far-uv and visible bands. ...
Solar Sails
... Solar Wind • Gives you another source of push at low velocities • Solar wind at the Earth goes about 520 km/s • This would give an effective thrust power of 0.05 Watts for a 10 square meter sail. • However it is not about power, it is about momentum (light still has 600 times more effect though) ...
... Solar Wind • Gives you another source of push at low velocities • Solar wind at the Earth goes about 520 km/s • This would give an effective thrust power of 0.05 Watts for a 10 square meter sail. • However it is not about power, it is about momentum (light still has 600 times more effect though) ...
Simbol-X: x-ray baffle for stray–light reduction. - IASF Palermo
... • not be reflected by the paraboloid but by the hyperboloid only (singly reflected hyperboloid rays (H). Contamination by stray–light is particularly severe for telescopes with large gaps between mirrors. If, because of the stray–light, too many photons from outside the nominal FoV arrive at the foca ...
... • not be reflected by the paraboloid but by the hyperboloid only (singly reflected hyperboloid rays (H). Contamination by stray–light is particularly severe for telescopes with large gaps between mirrors. If, because of the stray–light, too many photons from outside the nominal FoV arrive at the foca ...
pptx - Particle Physics and Particle Astrophysics
... • Most important source class: gamma-ray bursts (GRBs) • transient bursts of γ-rays from extragalactic sources • two classes: long (or long-soft) and short (or short-hard); boundary around 2 s (for 90% of emission) • the two classes are real but the 2 s ...
... • Most important source class: gamma-ray bursts (GRBs) • transient bursts of γ-rays from extragalactic sources • two classes: long (or long-soft) and short (or short-hard); boundary around 2 s (for 90% of emission) • the two classes are real but the 2 s ...
Low-budget satellite tracking system for highly elliptical orbits
... the size of a radio telescope). But how can “polar mounting” be used for satellites in elliptical orbit that do not circle the equator? Interestingly the principle is not limited to equatorial circles but can be applied to “scan” any orbit, as long as it is circular and parallel to the equatorial pl ...
... the size of a radio telescope). But how can “polar mounting” be used for satellites in elliptical orbit that do not circle the equator? Interestingly the principle is not limited to equatorial circles but can be applied to “scan” any orbit, as long as it is circular and parallel to the equatorial pl ...
Pallavicini - IASF Milano
... GO programmes, are starting to cover the full age-metallicity plane of nearby open clusters. They allow addressing the question whether a cluster of a given age is representative of all clusters with the same age. ...
... GO programmes, are starting to cover the full age-metallicity plane of nearby open clusters. They allow addressing the question whether a cluster of a given age is representative of all clusters with the same age. ...
Document
... Euclid. In essence, Euclid will have a wide field optical imager with spatial resolution similar to the HST, but with an exceptionally carefully controlled point spread function. • Only a 1.2m telescope, but it will take HST-like images of at least half of the extragalactic sky. • Visible imager con ...
... Euclid. In essence, Euclid will have a wide field optical imager with spatial resolution similar to the HST, but with an exceptionally carefully controlled point spread function. • Only a 1.2m telescope, but it will take HST-like images of at least half of the extragalactic sky. • Visible imager con ...
Chandra Observation of Pulsar Wind Nebula
... Materials ejected by the binary system during its evolution? The mass donor is suggested to be very similar to the Sun but a slightly evolved, it can not contribute to the cloud during its lifetime. The planetary nebula surrounding the exploded white dwarf could be a source of the cloud materia ...
... Materials ejected by the binary system during its evolution? The mass donor is suggested to be very similar to the Sun but a slightly evolved, it can not contribute to the cloud during its lifetime. The planetary nebula surrounding the exploded white dwarf could be a source of the cloud materia ...
Telescopes
... Ultraviolet (UV) light is absorbed by ozone in the Earth’s ozone layer, 25 km up. ...
... Ultraviolet (UV) light is absorbed by ozone in the Earth’s ozone layer, 25 km up. ...
