... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... As an example we take the science frame susi0100.bdf . ... Combining FLAT frames: Input=susi0100_ff.cat; output =susi0100_ff.bdf Statistics of frame no. 0: area [@60,@10:@ 1070 ,@ 1020 ] of frame minimum, maximum: 5.560000e+02 8.654000e+03 mean , standard_deviation: 6.101316e+03 1.913127e+02 Statistics of frame no. 1: area [@60,@10:@ 1070 ,@ 1020 ] of frame minimum, maximum: 8.390000e+02 1.276900e+04 mean , standard_deviation: 8.313817e+03 2.569877e+02 Statistics of ...

... Low-latitude aurorae are a storm time phenomena, in which particles originating from the ring current (and/or which are energized by the ring current) enter the lower thermosphere causing optical emission. It has been suggested (Rassoul et al., 1993) that four "pure" types of such auroras exist, as shown in table below, where LEE = low energy electron aurora, and HP = heavy particle aurora. ... low-latitude . ... One should thus not confuse them with other red emissions from much lower altitudes. ...

... Tonight's Sky . ... galaxies . ... Picture of the Day . ... Suzaku shows clearest picture yet of Perseus Galaxy Cluster . ... Suzaku explored faint X-ray emission of hot gas across two swaths of the Perseus Galaxy Cluster. ... X-ray observations made by the Suzaku observatory provide the clearest picture to date of the size, mass, and chemical content of a nearby cluster of galaxies. ... This Hubble Space Telescope image shows NGC 1275, the galaxy located in the center of the Perseus Galaxy Cluster....

The STIS and NICMOS calibration pipelines sometimes produce single calibrated images from associations of many exposures. ... The corresponding association table, located in the file with suffix asn and the same rootname as the association product, lists the exposures belonging to the association. ... The exposures belonging to a STIS association all reside in the same file, while the exposures belonging to a NICMOS association reside in separate datasets. ...

... Cassini Spacecraft Approaches Jupiter . ... Launched in 1997 and bound for Saturn in 2004, Cassini sent back the above image last week while approaching the giant planet Jupiter. ... The strange answer leads astronomers to conclude that the nucleus of the surrounding galaxy is not even visible in this image. ... Sputnik: Traveling Companion . ... Part of a binary star system only 8 light-years away, it was known in modern times to have a small companion star, Sirius B. N81: Star Cradle in the SMC . ...

... Flux density at 1 GHz (/Jy): 250 . ... Radio: Distorted shell, brighter to the E, with pulsar and associated nebula. ... ADS . ... Molonglo at 408 MHz (3': S=299 Jy). ... Einstein observations. ... 1991, ApJ, 372, L99. ... VLA at 327 MHz (3'.6?3'.8: S=469 Jy). ... VLA at 1.4 GHz (15''), plus X-ray spectra. ... 1996, ApJ, 461, 820. ... VLA at 1.5 and 8.4 GHz (8".9?7".8) of pulsar nebula. ... Reach & Rho 1996, A&A, 315, L277. ... VLA at 74 MHz (36''?39'': S=634?70 Jy) and 324 MHz (13'': S=411?50 Jy). ...

... They have 1 value for each of the 32 patterns. ... This is adapted to compact events. ... This is adapted to events spread out over many pixels. ... The C++ possible call are : CalReal32Vector EnergyCombinator::combine( const CalReal32Vector energye1 , const CalInt16Vector energye2 , const CalInt8Vector pattern , CalReal32Vector pha , // out const CalReal32Vector locbkg, const CalInt16Vector energye3, const CalInt16Vector energye4, const CalInt8Vector peripix,...

Some of the recent work by members of the SNR group at CfA has concentrated on studies of SNRs which display centrally-bright x-ray emission. ... As this supernova remnant (SNR) evolves, the blast wave sweeps up ISM material forming a shell of ~10^8 K gas surrounding a tenuous, hotter interior; a reverse shock propagates into the slower-moving ejecta. ... In Figure 1 we present X-ray and radio images of the prototypical middle-aged SNR, the Cygnus Loop. ... X-ray emission at the shock diminishes. ...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

... Files in red?history) . ... Trapped Motion . ... 10a. Particle Drift . ... Fast Particles . ... The fact charged particles circle around field lines was well known to J.J. Thomson when he experimented with electron and ion beams in a magnetic field. ... The notion of adiabatic invariance is tied with the early years of quantum theory. ... By about1910, physicists realized that these patterns indicated changes in the laws of physics as one approached atomic dimensions. ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... ESO, the European Southern Observatory . ... Member States . ... United Kingdom . ... Travel to Vitacura Office . ... Survey Telescopes . ... The entrance of The Santiago Central Office headquarters of the Atacama Large Millimeter/submillimeter Array (ALMA) project, located adjacent to the ESO offices in Santiago. With almost 7000 square metres of space, more than 100 offices and underground parking for 130 cars, it was built by ESO as part of its responsibilities as the European ALMA partner. ...

The active flaring binary CC Eri was studied via multi-wavelength observations involving multi-based photometry and ground- and space-based spectroscopy. ... The optical photometry indicated a small spot coverage in late 1989, consistent with data taken a year later which showed CC Eri entering its brightest-to-date phase. ... These flares radiated 2.7 10^{31} erg and 1.6 10^{31} erg in the CIV line alone, each with a total estimated radiative energy budget of \approx 10^{36} erg. ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

... March 7, 1997 . Comet Hale-Bopp Enters the Evening Sky . ... Explanation : You no longer have to wake-up early to see Comet Hale-Bopp . ... Both writer/editors of APOD are impressed by how bright Comet Hale-Bopp has become, and how easily visible it is. The central coma is now visible from almost any location - even from a bright city. ... Comet Hale-Bopp 's coma now rivals even last year's Comet Hyakutake , and the tail appears to be increasing in length daily. ... About APOD > . ...

Many entry fields permit sexagesimal entry (h:m:s.s or :':"). ... Sexagesimal entry is flexible in that you can specify one to three fields, as you desire. ... Position entry widgets assume that a single field is decimal hours or degrees (h.h or . ... You may specify one to three fields: . ... Note: sexagesimal offsets and durations are entered in the same fashion, but a single field is decimal arc-seconds or seconds ('.' or s.s) and two fields are (arc) minutes and seconds (':"." or m:s.s). ...

Related Solar Energy Sites . ... alt.energy.renewable news group . ... American Solar Energy Society . ... Association of State Energy Research and Technology Transfer Institutions . ... Brightfields Initiative - U.S. Department of Energy . ... CANMET Energy Diversification Research Laboratory . ... Concentrating Solar Power Program - U.S. Department of Energy . ... National Renewable Energy Laboratory Clean Energy Basics . National Renewable Energy Laboratory High-performance Buildings Research . ...

To enter a command type its name followed by any options and arguments that you want the command to have. Leave one or more spaces between the command name, its options and arguments. If necessary you can continue the command onto another line. Correct mistakes by using the <Delete> or <BackSpace> key to back up along the command line and correct it. ... Quoting command arguments . Entering more than one command . ... Command name completion . Editing the command line . ...

... The processing of these associated images presents new challenges to the HST data processing pipelines, which heretofore operated only on single images. ... Stage 1 (CALNICA) calibrates individual exposures without information from other members of the association. ... Stage 2 of calibration (CALNICB) only operates on associated images that have previously gone through CALNICA processing, and creates combined images for each distinct (non-overlapping) pointing within the association. ...