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	ngc 6240 (Site not responding. Last check: 2007-10-20)
		NGC 6420 is a galaxy located in the constellation Ophiuchus.
		NGC 6240 differs from other galaxies in having two nuclei.
		NGC 6240 was first observed in detail with the IRAS satellite.
	www.yourencyclopedia.net /NGC_6240.html (141 words)

	Article 1
		NGC 6240 is itself a product of a recent collision between two smaller galaxies, with each galaxy donating its central fl hole.
		NGC 6240 is also a starburst galaxy, with massive stars forming at an exceptionally rapid rate from copious amounts of liberated gas in the interstellar regions, a result of the galaxy's violent beginnings.
		We are seeing NGC 6240 as it was 400 million years ago; the merger has likely occurred since then, and the light and gravitational waves are on their way.
	www.physics.odu.edu /~weinstei/120f03/astro8.html (876 words)

	New General Catalogue - InfoSearchPoint.com (Site not responding. Last check: 2007-10-20)
		The NGC was compiled in the 1880s by Dreyer using observations mostly from William Herschel, and then subsequently expanded with two Index Catalogues (ICs), adding nearly 5,000 objects.
		NGC 5866 - A lenticular galaxy in the Draco constellation
		NGC 6402 - M14, a globular cluster in the Ophiuchus constellation
	www.infosearchpoint.com /display/NGC (344 words)

	May 2003 - "X-ray view" into the "heart" of the Galaxy NGC 6240 (Chandra) (Site not responding. Last check: 2007-10-20)
		Three images of the galaxy NGC 6240 taken in the optical (left), infrared (upper right), and X-ray light (lower left).
		NGC 6240 is one of the nearest of the so-called ultra-luminous infrared galaxies, which radiate enormous energies in the infrared in the form of heat.
		This observation resulted in the discovery of two active nuclei in the center of the galaxy (blue colored), that means in the discovery of two super-massive fl holes, which suck in their ambient matter.
	wave.xray.mpe.mpg.de /rosat/calendar/2003/may (232 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		===== NGC 6027 is the brightest galaxy in Seyfert's Sextet.
		NGC 6125 = H II 810 is the brighter of the two, so is almost certainly the galaxy that WH saw, though he must have made an error of 20 arcmin in reading the NPD (see Dreyer's note in the Herschel Papers, 1912).
		The position in GC and NGC was either reduced with respect to a rather crude position for the comparison star (101 Her), or a (simple digit?) error of -20 seconds of time has crept into the RA.
	www.ngcic.org /corwin/DataFiles/Nov19_2004/ngcnotes_6.txt (23202 words)

	Unveiling the AGN powering the "Composite" Seyfert/Star-forming galaxy NGC 7679: BeppoSAX and ASCA results (Site not responding. Last check: 2007-10-20)
		NGC 6240, NGC 4945), most strikingly here and at odds with the above examples, the X-ray spectrum of NGC 7679 does not appear to be highly absorbed.
		The main peculiarity of objects like NGC 7679 is not the strength of their starburst but the apparent optical weakness of the Seyfert 1 nucleus when compared with its X-ray luminosity.
		To date NGC 7679 is one of the few Seyfert 1/Starburst composites for which the broad-band X-ray properties have been investigated in detail.
	aanda.u-strasbg.fr:2002 /papers/aa/full/2001/33/aa1166/aa1166.html (353 words)

	New General Catalogue : NGC
		The NGC was compiled in the 1880s by Dreyer[?] using observations mostly from William Herschel, and then subsequently expanded with two Index Catalogues (ICs).
		Together with nearly 5,000 objects in the two ICs, the NGC naturally contained many errors which have for the most part been eliminated by the Revised NGC[?].
		NGC 2346 - a planetary nebula in the Monoceros constellation
	www.fastload.org /ng/NGC.html (243 words)

	A Radio Study of the Ultra-luminous FIR Galaxy NGC 6240 (Site not responding. Last check: 2007-10-20)
		New observations of NGC 6240 were taken with the VLA at 20cm in the B-configuration, and at 3.6cm in the A-configuration.
		The 2 images from the new VLA observations and 5 images from previous VLA observations are used to identify the morphological and spectral features of the strong, compact components in the nuclear regions ($\lapprox$ 1.5 kpc; D$=$100 Mpc) and of the weaker ``clumps'' of diffuse emission south and west ($\gapprox$ 3 kpc) from the nucleus.
		The models that have been proposed in the literature for the FIR excess of NGC 6240 are evaluated for consistency with the observed radio emission.
	www.aas.org /publications/baas/v25n2/aas182/abshtml/S4404.html (300 words)

	ISOPHOT 3 to 240 micron Spectral Energy Distribution of NGC 6240 (Site not responding. Last check: 2007-10-20)
		NGC 6240 is a tightly interacting system of two galaxies which will eventually merge.
		The most important signatures of this interaction are a strongly disturbed and irregular body with extended tails and two nuclei separated in projection by 2", or about 2000 light years.
		"Infrared spectral energy distributions of the interacting galaxies Arp 244, NGC 6240, and Arp 220".
	isowww.estec.esa.nl /galleries/nor/ngc6240c.htm (136 words)

	[52.07] Adaptive optics observations of NGC 6240 at the Keck and Lick Observatories (Site not responding. Last check: 2007-10-20)
		[52.07] Adaptive optics observations of NGC 6240 at the Keck and Lick Observatories
		NGC 6240 is a luminous IRAS galaxy, and contains a nuclear starburst that is about 10 million years old.
		NGC 6240 consists of two merging disk galaxies.
	www.aas.org /publications/baas/v32n4/aas197/1196.htm (192 words)

	SRON National Institute for Space Research (Site not responding. Last check: 2007-10-20)
		NGC 6240 is one of the nearest ULIRGs and is considered a key representative of its class.
		The observation, performed with the ACIS-S detector aboard the Chandra X-Ray Observatory, led to the discovery of two hard nuclei, coincident with the optical-IR nuclei of NGC 6240.
		The close correlation of the extended emission with the optical Ha emission of NGC 6240, in combination with the softness of its spectrum, clearly indicates its relation to starburst-driven superwind activity.
	www.sron.nl /www/code/publications/abstract.php?PUBLICATION_ID=1717 (186 words)

	Black holes in a double pack
		High energy radiation (blue) emanating from the two fl holes in the center of the galaxy NGC 6240 superimposed with an optical image from the Hubble Space Telescope (yellow).
		The extraordinarily bright galaxy NGC 6240 is roughly 400 million light years away from earth and is a prime example of the collision and subsequent merging of two galaxies causing "fireworks" as new stars are created.
		Over the next few hundred million years, the two fl holes in NGC 6240, which are roughly 3000 light years apart, will drift toward each other and eventually merge to form an even larger, supermassive fl hole.
	www.eurekalert.org /pub_releases/2002-11/m-bhi112102.php (636 words)

	Cosmic Couple: One galaxy, two gravitational beasts: Science News Online, Nov. 30, 2002 (Site not responding. Last check: 2007-10-20)
		She and her colleagues were drawn to NGC 6240 by its unusual properties, including its infrared brightness, strong X-ray emissions, huge concentrations of gas, and fast-moving stars.
		As the two giant fl holes in NGC 6240 bridge their 3,000—light-year gap and merge over millions of years, they will release intense radiation.
		Discovery of a binary AGN in the ultraluminous infrared galaxy NGC 6240 with Chandra.
	www.sciencenews.org /20021130/fob1.asp (675 words)

	Focus On NGC 6240
		From then on I have thought of NGC 6240 as the Rumpled Starfish Galaxy.
		NGC 6240 caused quite a stir among professional astronomers when it was observed by the IRAS satellite to be extremely luminous in the far infrared.
		NGC 6240 apparently represents a new, interesting and challenging object to observe visually, particularly in larger telescopes.
	www.skyhound.com /sh/archive/jun/NGC_6240.html (806 words)

	Tamara Bogdanovic
		NGC 6240 is a composite galaxy hosting a luminous starburst and two active galactic nuclei obscured by gas and dust.
		We have obtained adaptive optics, high spatial resolution near-infrared spectra and images of NGC 6240 which show the presence of circumnuclear shock and starburst in nuclear region.
		Fact: The binary AGN of NGC 6240 is ultimately going to merge and form one nucleus.
	gravity.psu.edu /~tamarab (902 words)

	SCYON: Paper abstracts (Site not responding. Last check: 2007-10-20)
		We have made use of archival HST BVIJH photometry to constrain the nature of the three discrete sources, A1, A2 and B1, identified in the double nucleus of NGC 6240.
		The A1 source is characterised by a mass density of about 1200 Msun/pc^3 which resembles the CO molecular mass density measured in cold ULIRGs and the stellar density determined in ``elliptical core'' galaxies.
		This, together with the recent discovery of a supermassive binary fl hole in the double nucleus of NGC 6240, might indicate that the ongoing merger could shape the galaxy into a core elliptical.
	obswww.unige.ch /webda/scyon/Pasquali.html (252 words)

	New Scientist Breaking News - Black holes are double trouble for galaxy
		Stefanie Komossa of the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, and her colleagues used Chandra to look at an extraordinarily bright galaxy called NGC 6240, which is about 400 million light years from Earth.
		Although the astronomers call the discovery "surprising", it makes sense given that the shape of NGC 6240 implies that it is formed from two giant galaxies that have merged together relatively recently.
		In fact, NGC 6240 is a perfect vision of the fate of our own Galaxy, the Milky Way.
	www.newscientist.com /article.ns?id=dn3088 (427 words)

	TruthNews
		The Chandra image reveals that the nucleus of an extraordinarily bright galaxy, known as NGC 6240, contains not one, but two giant fl holes, actively accreting material from their surroundings.
		At a distance of about 400 million light years, NGC 6240 is a prime example of a massive galaxy in which stars are forming at an exceptionally rapid rate due to a recent collision and subsequent merger of two smaller galaxies.
		Over the course of the next few hundred million years, the two fl holes in NGC 6240, which are about 3000 light years apart, will drift toward one another and merge to form an even larger supermassive fl hole.
	truthnews.com /world/2002110115.htm (734 words)

	Oct 2002 - Röntgenkonturen von NGC 6240 (Site not responding. Last check: 2007-10-20)
		The image shows NGC 6240, one of the nearest and best-known ultra luminous infrared galaxies.
		ROSAT observations of this type of galaxies led to the discovery of luminous extended X-ray emission (ROSAT HRI; represented as contours superposed on an optical false colour image) and provided evidence for the presence of an obscured active nucleus (ROSAT PSPC).
		Its radiation is so luminous that it can be explained only by a super star forming burst; alternatively it can be considered as a contribution of scattering radiation of a quasar wrapped up in dust.
	wave.xray.mpe.mpg.de /rosat/calendar/2002/oct (152 words)

	Chandra :: Photo Album :: NGC 6240 :: More Images of NGC 6240 (Site not responding. Last check: 2007-10-20)
		The image on the left shows the galaxy NGC 6240 in optical wavelengths taken by the Wide-Field Planetary Camera 2 aboard the Hubble Space Telescope.
		This image shows the central region of the galaxy NGC 6240 in optical wavelengths taken by the Wide-Field Planetary Camera 2 aboard the Hubble Space Telescope.
		This image shows the wide field view of the galaxy NGC 6240 in optical wavelengths taken by the Wide-Field Planetary Camera 2 aboard the Hubble Space Telescope.
	chandra.harvard.edu /photo/2002/0192/more.html (667 words)

	Chandra :: Photo Album :: NGC 6240 :: 19 Nov 02
		The Chandra image of NGC 6240, a butterfly-shaped galaxy that is the product of the collision of two smaller galaxies, revealed that the central region of the galaxy (inset) contains not one, but two active giant fl holes.
		NGC 6240 is a prime example of a
		One consolation is that if astronomers on NGC 6240 are observing our Milky Way galaxy, they are likewise 400 million years behind the times - our times, that is. As Albert Einstein said, "The past, present and future are only illusions, even if stubborn ones." more
	chandra.harvard.edu /photo/2002/0192 (473 words)

	ngc6240 (Site not responding. Last check: 2007-10-20)
		The notorious merging and infrared-bright galaxy NGC 6240 in Ophiuchus, seen in a composite of BVR CCD images obtained with the ESO/MPI 2.2m telescope at La Silla, Chile.
		Logarithmic mapping has been used to stress detail over a wide dynamic range.
		This galaxy became well-known when the IRAS satellite found it to have an enormous far-infared luminosity; this is one of the prototype "IRAS galaxies".
	crux.astr.ua.edu /gifimages/ngc6240.html (111 words)

	Binary Black Holes Found in Nearby Galaxy (washingtonpost.com)
		The fl holes were discovered in galaxy NGC 6240, an exceptionally bright star swarm 400 million light-years away.
		If the universe were the size of the Earth, he said, and if the Milky Way were in Washington, NGC 6240 would be about as far away as Boston.
		The picture of NGC 6240 revealed by Chandra provides a "snapshot of an evolutionary process," Sigurdsson said.
	www.washingtonpost.com /ac2/wp-dyn?pagename=article&node=&contentId=A12382-2002Nov19¬Found=true (802 words)

	High Energy Astrophysics Picture Of the Week
		A merger of galaxies might mean a merger of fl holes, and may be one way nature builds supermassive fl holes, by combining smaller fl holes together.
		A new observation of the galaxy NGC 6240 has perhaps revealed this mechanism in motion.
		NGC 6240 is a the remnant of a merger of 2 smaller galaxies.
	heasarc.gsfc.nasa.gov /docs/objects/heapow/archive/compact_objects/binary_bh_chandra.html (259 words)

	Stefanie Komossa's homepage
		Discovery of a binary AGN in the ultraluminous infrared galaxy NGC 6240 using Chandra
		Subarcsec structures in the double nucleus of NGC 6240 disclosed with HST at 370, 430 and 500 nm
		Subarcsec structures in the double nucleus of NGC 6240 with HST at 370, 430 and 500 nm
	www.xray.mpe.mpg.de /~skomossa (1290 words)

	APOD: 2002 November 28 - The Supermassive Black Holes of NGC 6240 (Site not responding. Last check: 2007-10-20)
		Explanation: The Hubble optical image on the left shows NGC 6240 in the throes of a titanic galaxy - galaxy collision 400 million light-years away.
		As the cosmic catastrophe plays out, the merging galaxies spew forth distorted tidal tails of stars, gas, and dust and undergo frantic bursts of star formation.
		Using the orbiting Chandra Observatory's x-ray vision to peer within the bright central regions of NGC 6240 astronomers believe they have uncovered, for the first time, not one but two enormous orbiting fl holes, by detecting the characteristic x-ray radiation from the interstellar debris swirling toward them.
	antwrp.gsfc.nasa.gov /apod/ap021128.html (230 words)

	ATHENSi.com/The Matrix
		Very recently Harvard’s Chandra X-ray Observatory made observations of two massive fl holes in the NGC 6240 galaxy which will collide.
		NGC 6240 is a butterfly-shaped galaxy located 400 million light-years away that has been birthing stars at a very high rate due to its recent collision with another small galaxy.
		Due to the dust and gas released from this collision, the merging fl holes were very difficult to discover.
	www.athensi.com /matrix.html?story_id=8014 (384 words)

	A Super Galactic Discovery
		NASA's Chandra X-ray Observatory spotted the two fl holes in the galaxy NGC 6240.
		At a distance of about 400 million light-years, NGC 6240 is a prime example of a starburst galaxy--that is, a massive galaxy in which stars are forming at an exceptionally rapid rate due to a recent collision and subsequent merger of two smaller galaxies.
		Because of the large amount of dust and gas in such galaxies, it is difficult to peer deep into their central regions.
	science.nasa.gov /headlines/y2002/20nov_2bh.htm (780 words)

	List of publications
		NGC 6240, pathfinder to the high-redshift universe of ultraluminous IR galaxies,
		X-ray evidence for an AGN and superwind in the ultraluminous IR galaxy NGC 6240,
		A subarcsecond high-excitation knot in the southern nucleus of NGC 6240 - indicator of a hidden AGN?
	www.xray.mpe.mpg.de /~skomossa/publrev.html (3069 words)

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