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Topic: 3C273

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Quasar

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	Chandra :: Photo Album :: 3C273 :: 06 Nov 00
		This Chandra image shows important new details in the powerful jet shooting from the quasar 3C273, providing an X-ray view into the area between 3C273's core and the beginning of the jet.
		The recent Chandra data show a continuous X-ray flow in 3C273 from the core to the jet, which may reveal insight on the physical processes that power these jets.
		The energy emitted from the jet in 3C273 probably comes from gas that falls toward a supermassive fl hole at the center of the quasar, but is redirected by strong electromagnetic fields into a collimated jet.
	chandra.harvard.edu /photo/2000/0131/index.html (275 words)

	Quasar Summary
		Astronomers calculate that the first quasar identified, 3C273 (3rd Cambridge catalog, 273rd radio source) located in the constellation Virgo, is moving at the incredible speed of one-tenth the speed of light and, although dim to optical astronomers, is actually five trillion times as bright as the Sun.
		Subsequent studies of Quasar 3C273 showed that it blasts jets of visible and x-ray energy tens of thousands of light-years into space, a phenomena that could only be explained by the presence of one rotating, supermassive object, with galactic matter orbiting in an accretion disk.
		The currently brightest known quasar is the ultraluminous 3C 273 in the constellation of Virgo.
	www.bookrags.com /Quasar (5994 words)

	3C273
		3C273 is a radio-loud quasar, and was also one of the first extragalactic X-ray sources discovered in 1970.
		VLBI radio observations of 3C273 have revealed proper motion of some of the radio emitting regions, further suggesting the presence of relativistic jets of material.
		3C273 is located at (J2000) right ascension 12h 29m 6.7s, declination +2d 3m 8.6s, and is visible in May in both the northern and southern hemispheres.
	www.ebroadcast.com.au /lookup/encyclopedia/3c/3C273.html (332 words)

	Analysis of tracking experiments performed in February 1998
		3c273 was followed over a large azimuth range that includes 16 wheel/joint interactions, and 3c279 was followed over the last 4 of these.
		The larger 3c273 dataset also shows difference spikes of amplitude ~5", particularly at azimuths 142 and 174, that are associated with wheel/joint interactions.
		In contrast, the behaviour in elevation errors appear to be quite random, except perhaps for a 2" or 3" glitch at azimuth 155, which is unassociated with a joint.
	www.jach.hawaii.edu /JCMT/telescope/pointing/980408.html (1459 words)

	Double helix in the quasar 3C273
		In the image of 3C273, the emission across the jet is resolved, revealing two threadlike patterns that form a double helix inside the jet.
		3C273 was observed with the VSOP at the wavelength of 6 cm.
		The VSOP observation of 3C273 was supported by ten VLBA (Very Long Baseline Array, operated by National Radio astronomy Observatory, USA) antennae and the Effelsberg 100-meter telescope operated by Max-Planck-Institut for Radioastronomy.
	www.mpifr-bonn.mpg.de /staff/alobanov/3C273-Science (1105 words)

	Enzyklopädie :: 3C273 (Site not responding. Last check: )
		3C273, aufgenommen mit einer ToUcam an einem 10" SCT mit 600mm Brennweite
		3C273 steht in der Nähe der Ekliptik und kann gelegentlich vom Mond bedeckt werden.
		3C273 ist relativ leicht zu finden, denn er befindet sich etwa 4° in ost-ost-südlicher "8 Uhr" Richtung von Vir 16 (5 mag).
	www.enzyklopadie.cc /3C273 (332 words)

	SFL ORG. News Center Evidence for Ultra-Energetic Particles in Jet from Black Hole
		Both studies involve the jet of the quasar 3C273, famous since its identification in 1963 as the first quasar.
		Composite showing the relation between the quasar 3C273 (top left; the quasar is a very small and bright source, the fuzz apparently surrounding it is an artifact that appears when taking a picture of a very bright source with a camera and telescope for very faint things) and the jet.
		3C273 is the first object that was called a quasar.
	www.sflorg.com /spacenews/sn062006_02.html (787 words)

	3C273 - WikiLeasing.com (Site not responding. Last check: )
		In 1963, Maarten Schmidt and Bev Oke published a pair of papers in ''Nature'' reporting that 3C273 has a substantial redshift, lacing it several billion light years away.Prior to the discovery of 3C273, several other radio sources had been associated with optical counterparts, the first being 3C48.
		3C273 was the first object to be identified as what we now know quasars to be andmdash; extremely luminous objects at cosmological ddistances.3C273 is a radio-loud quasar, and was also one of the first extragalactic X-ray sources discovered in 1970.
		VLBI radio observations of 3C273 have revealed proper motion of some of the radio emitting regions, further suggesting the presence of relativistic jets of material.3C273 is located at (J2000) right ascension 12h 29m 6.7s, declination +2d 3m 8.6s, aad is visible in May in both the northern and southern hemispheres.
	www.wikileasing.com /3/3C273.html (440 words)

	quasars
		This is the fifth visit to 3C273 and the briefest exposures yet to show a cosmological redshift which is pretty amazing for a mag 13 object.
		3C273 revisited in brief exposure which prove sufficient when viewed together to extract a redshift from two major hydrogen emission lines using Altair as a fixed comparison.
		To shine at mag 13 at this range requires the collective energy of a 1000 galaxies crammed into this 'tiny' space and stars and gas falling into a massive flhole at the core the host galaxy is the only current explanation.
	www.astroman.fsnet.co.uk /quasars.htm (958 words)

	Chandra observes cosmic traffic pile-up in energetic quasar jet - MIT News Office
		The energy emitted from the jet in 3C273 probably comes from gas that falls toward a supermassive fl hole at the center of the quasar but is redirected by strong electromagnetic fields into a jet.
		Discovered in the 1960s, 3C273 was one of the first objects to be recognized a "quasi-stellar" object due to its incredible optical and radio brightness but perplexing properties.
		The Chandra observation of 3C273 was made with both the Low Energy Transmission Grating (LETG) and the High Energy Transmission Grating (HETG), in conjunction with the High Resolution Camera (HRC) and the Advanced CCD Imaging Spectrograph (ACIS).
	web.mit.edu /newsoffice/2000/chandra-1108.html (645 words)

	3C273 with Chandra and Spitzer (Site not responding. Last check: )
		3C273 is a Quasar, the astronomical term for the intense emission from extremely hot matter that is about to disappear into a fl hole.
		astro-ph/0605530) on 3C273 with the Spitzer Space Telescope, observing in the infrared.
		False-colour composite showing the relation between the quasar 3C273 (top left; the quasar is really just a very small and bright source, the fuzz apparently surrounding it is an artifact that appears when taking a picture of a very bright source with a camera and telescope for very faint things) and the jet.
	www.astro.soton.ac.uk /~jester/3C273.html (473 words)

	ESA Science & Technology: 3C273 Revisited - Confirmation by Cos-B of High Energy Gamma-Ray Emission
		The presence of a high-energy (50-800 MeV) Gamma-radiation source is confirmed, and its position is consistent with 3C273.
		Spectral y-ray data for the total 3C273 data set are presented and compared with low and high-energy X-ray contemporary measurements.
		Recent Einstein Observatory X-ray data on the short term variability of the central part of the QSO are used to show that, within reasonable assumptions, the photon-photon interaction excludes the gamma-ray source from coinciding with the variable X-ray source, thus ruling out comptonisation models for the production of energetic photons.
	sci.esa.int /science-e/www/object/index.cfm?fobjectid=37547 (192 words)

	Internal structure and polarization of the optical jet of the quasar 3C273
		The optical emission is tightly confined to the core of the radio jet, and is resolved into a number of highly polarized knot structures.
		Comparison with the radio maps also reveals asymmetry in the emission across the jet, indicating significant lateral motion of the jet relative to the ambient medium.
		The onset of optical emission from the jet some distance from the nucleus of 3C273 could arise from the interaction of the jet with a shell of gaseous material surrounding the host galaxy.
	www.nature.com /nature/journal/v365/n6442/abs/365133a0.html (418 words)

	3C273
		OBSERVATION OF THE REDSHIFT OF THE QUASAR 3C273
		The spectrum of 3C273 has a sufficient signal to noise ratio to show emission lines immediately.
		It is necessary to remember under which conditions this observation was carried out: practically downtown, with a lighting which prevents from seeing stars weaker than magnitude 2.5 with the naked eye.
	www.astrosurf.com /buil/us/spe6/quasar.htm (2495 words)

	Chandra Press Room :: Evidence for Ultra-Energetic Particles in Jet from Black Hole :: June 20, 2006
		Both studies involve the jet of the quasar 3C273, famous since its identification in 1963 as the first quasar.
		Thanks to the sensitivity of NASA's Great Observatories, we have been able to map the 3C273 jet in infrared, visible light and X-rays," said C. Megan Urry, Israel Munson Professor of Physics and Astronomy at Yale, and an author on one study.
		Composite showing the relation between the quasar 3C273 (top left; the quasar is a very small and bright source, the fuzz apparently surrounding it is an artifact that appears when taking a picture of a very bright source with a camera and telescope for very faint things) and the jet.
	chandra.harvard.edu /press/06_releases/press_062006.html (580 words)

	A flare in the millimetre to IR spectrum of 3C273
		A flare in the millimetre to IR spectrum of 3C273
		Our discovery of a concurrent flare in the IR-to-near-millimetre spectrum of 3C273 implies that the emission over this range of frequency originates in the same region of the source.
		The time scale of the flare is suggestive of an event within the central 0.1 pc of the source.
	www.nature.com /nature/journal/v305/n5931/abs/305194a0.html (285 words)

	Curdridge Observatory - 3C273 Quasar
		3C273 is one of the brightest of this class and easily within range of our webcams.
		I have made a number of different observations of this object.
		As 3c273 is so far away, its spectrum ought to be red-shifted to to the fact its travelling away from us at great speed.
	astro.neutral.org /imagehtml/20050408_3c273.html (458 words)

	Quasar 3C273
		3C273 finder chart for Star-hopping from Eta Viginis, circles are 1 degree, down to magnitude 11.
		Then I switched to a 9mm eyepiece (135x) to darken the background and 3C273 became just visible.
		With averted vision I was able to see several more nearby stars and confirm the identity of the quasar.
	www.cs.cmu.edu /~zhuxj/astro/html/quasar3c273.html (200 words)

	Gene Smith's Astronomy Tutorial - Quasars
		Observations of an occultation of the radio source 3C273 by the moon made by Cyril Hazard and colleagues showed that the position of the radio source was coincident with a 12th magnitude stellar object (about 250 times fainter than can be seen by eye, but bright by astronomical standards).
		Schmidt puzzled over the photographic spectrum for months before he recognized that the strong, broad emission lines in the star were the familiar hydrogen-Balmer series, but redshifted by 15%.
		3C273 was a thousand times brighter than even a very luminous galaxy would appear at a distance of 2 billion light years, corresponding to a redshift of 15.8%.
	casswww.ucsd.edu /public/tutorial/Quasars.html (1097 words)

	3C273 at AllExperts
		After accurate positions were obtained using lunar occultation at the Parkes Radio Telescope, the radio source was quickly associated with an optical counterpart, an unresolved stellar object.
		Also, many active galaxies had been misidentified asvariable stars, including the famous BL Lac, W Com, and AU CVn.
		3C273 was the first object to be identified as what we now know quasars to be — extremely luminous objects at cosmological distances.
	en.allexperts.com /e/0/3c273.htm (495 words)

	Amateur quasar spectrum shows expansion of the Universe (Site not responding. Last check: )
		This emission line spectrum of the quasar 3C273 in Virgo is compared to the hydrogen absorption lines in the nearby star Vega which is used as a 'static' reference.
		Each spectrogram also contains the direct undispersed stellar image (zero order spectrum) of Vega and 3C273 respectively, as points of light to the right and these are used to align the two spectrograms.
		3C273 image taken 1998 Dec 21 with 30cm SCT + spectroscope (dispersion 160nm/mm) + Starlight Xpress MX9 CCD camera; 24m exposure (integration of 6 exposures).
	www.britastro.org /journal/archive/redshift.htm (189 words)

	Astromart News - Why do Jets Emanate from Quasars and Black Holes?
		The energy emitted from the jet in 3C273 probably comes from gas that falls toward a supermassive fl hole at the center of the quasar, but is redirected by strong electromagnetic fields into a collimated jet.
		A new clue is provided by the jet of Quasar 3C273, a radio, optical, and X-ray spike that extends over a hundred thousand light years into space.
		According to the researchers, while the lifetime of the X-ray producing particles is only about 100 years, the data indicate that the visibly brightest part of the jet has a length of about 100,000 light years.
	www.astromart.com /news/news.asp?news_id=527 (931 words)

	Рентгеновский телескоп Chandra сфотографировал поток материи, ...
		[NASA] Космический рентгеновский телескоп Chandra с высоким разрешением сфотографировал квазар 3C273 и вылетающий из него мощный поток вещества.
		На представленном фото видно, что между ядром квазара 3C273 и началом потока вещества есть промежуток, в котором рентгеновское излучение очень слабое.
		Энергия, испускаемая потоком вещества в квазаре 3C273, возможно поступает от газа, падающего на сверхмассивную черную дыру в центре квазара, и перенаправляемого мощными электромагнитными полями в коллимированный поток.
	www.stars.ru /news/misc/spacenews/00/11/09_896.htm (106 words)

	3C273
		OBSERVATION OF THE REDSHIFT OF THE QUASAR 3C273
		It is necessary to remember under which conditions this observation was carried out: practically downtown, with a lighting which prevents from seeing stars weaker than magnitude 2.5 with the naked eye.
		Moreover, 3C273 was far from zenith (45° above horizon approximately), which is unfortunately very effective downtown in terms of background sky level.
	www.astrosurf.org /buil/us/spe6/quasar.htm (2495 words)

	SPACE.com -- Quasar Jets Create Cosmic Pileups
		An X-ray view into the area between the core of 3C273 and the beginning of the jet.
		The jet blasting out of the core of quasar 3C273 is seen in optical, X-ray and radio emissions.
		The core of quasar 3C273 is brighter than 1,000 galaxies but occupies a space no larger than our solar system.
	www.space.com /scienceastronomy/astronomy/chandra_pileup_001108.html (638 words)

	3c273
		C’est dans le spectre de 3C273, que les astronomes, vers 1963, ont compris que les raies incompréhensibles qui le composaient étaient en fait décalées de 17% vers le rouge (red-shift).
		3C273 est donc mille fois plus éloigné que la galaxie d’Andromède et 44 fois plus que l’amas de la Vierge.
		En partant de X1 et X2, chercher le triangle formé par 101, A et B. Dans ce triangle, un autre petit triangle est visible formé de 3C273, c et d.
	perso.orange.fr /florence.claude/3c273.htm (645 words)

	Superluminal Motion in 3C273 Jet and Counterjet
		My question is this: Quasar 3C273 has a jet moving at 9 times light speed as seen from earth.
		This has been explained away by science by saying that the angle of the jet towards earth is just small enough to actually only give an illusion of faster than light speeds relative to earth.
		It would be expected to be dimmer (since radiation tends to be beamed in the direction of motion) and not show apparent superluminal motion.
	imagine.gsfc.nasa.gov /docs/ask_astro/answers/981228a.html (356 words)

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