The AstroGuide . ... Home | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Home of quality, affordable Telescope Optics such as Eyepieces, Barlow Lenses, high quality Binoviewers (for comfortable two eye viewing), and a variety of Illuminated and Non-Illuminated Viewfinders. Last Update January 06, 2005 . ... 919) 553-3980 . ... Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . ...

... Tonight's Sky . ... Star Atlas . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... Astronomy for Kids . ... Explosion illuminates invisible galaxy in the Dark Ages . ... This star lived at a very interesting time, the so-called Dark Ages just a billion years after the Big Bang, said Ryan Chornock of the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Massachusetts. ... Only registered members of Astronomy.com are allowed to comment on this...

... ACCESSORIES . ... OEM COMPONENTS . ... ABOUT LOMO . ... MICROSCOPES . ... OEM OPTICAL COMPONENTS . ... MICROSCOPE APPLICATION GUIDE AND MODEL SELECTOR . ... LOMO stereo microscopes deliver crisp images for such demanding applications as industrial inspection, electronic component manufacturing, biological and botanical studies, classroom teaching, etc. ... LOMO manufactures the widest range of microscope accessories and components such as objectives, eyepieces, condensers, illuminators, stages, etc....

Next: Produce a spectral data Up: AXAF Recipes Previous: Viewing the qpoe file. Within IRAF (if you have the 'ftools' package loaded), you can produce a PHA distribution. ... The MARX files have 4096 PHA channels defined for ACIS, thus the main problem is to rebin the data to a reasonable number of PHA channels. ... Procedure to create an XSPEC PHA FITS file from a MARX Event qpoe file. ... Create an XSPEC compatible PHA FITS file . Rebin the XSPEC PHA FITS file . ...

Villains and Heroes of Lights and Lighting Fixtures . If we are to reduce the effects of light pollution, we must learn about the types, both good and bad, of fixtures used in outdoor lighting. ... In fact, this type of fixture is often chosen for this very reason. ... Although these lamps are not very energy efficient, and they are often found in older, inefficient fixtures that enhance light pollution, they still exist in great abundance in most locations and are still sold by the millions. ...

... The seeing was good enough to be able to reduce both 850 and 450 micron data. aperture calculated from 850 micron data . ... Data, model and residuals for 450 micron data These maps were taken in March 2001. ... 1mm defocus data and model maps . 0.5mm defocus data and model maps . infocus data and model maps . ... The map of surface errors (shown as phase errors in radians) and the map of calcualated surface illumination is shown in the following plot: . ... 2mm defocus data and model maps . ...

... A small yet powerful planning and scheduling toolkit has been built for the Submillimeter Wave Astronomy Satellite ( SWAS ) Small Explorer spacecraft. ... The simple design, minimal resource requirements and easy extensibility of the SWAS planning and scheduling toolkit should make it useful for other space astronomy missions. ... The relatively severe time and manpower constraints for the development of the SWAS Planning and Scheduling toolkit have forced it to remain small and simple. ...

82% of the galaxy s total [O III] luminosity, confirming that J2240 is a quasar ionization echo. The ionized gas cloud has a strong kinematic link to the central AGN and is co-rotating with the main body of the galaxy, suggesting that it may be the remnant of a quasar-driven outflow. ... Detailed 3D spectroscopic analysis of other GB galaxies will provide further insight into the evolutionary history of this unique class of objects. ...

Frontside Illumination means the photons are indicident upon the electrode (gate) side of the CCD. Polysilicon layer has a typical thickness of 0.5 microns and hence photons with wavelength shorter than this (i.e. Blue Band) will interact with this layer producing an interference pattern. The preferential absorption of blue photons means low QE in the blue. ... In order for blue photons to reach the gates, however, the CCD must be thinned down a layer of about 10 microns in thickness. ...

... One striking feature is a small source of almost pure H 2 line emission, which is located near one of the compact sources in Orion reported by O'Dell and collaborators (HST-18 = 203-504). ... H-H objects, Proplyds, Orion Bar, H 2 . ... We obtained a series of images across the bright rim of the Orion Bar near the peaks of mm-wave molecular line emission with NICMOS cameras 1-3 (NIC1, NIC2, NIC3) in several filters on 1998 February 18. ... The suggestion of an H-H object does not seem compelling. ...

... ARC 3.5m | ... 2.3 Taking DIS Exposures . ... Instrument Calibration . ... 5.3 Fringing in Red . ... DIS (Dual Imaging Spectrograph) is a medium dispersion spectrograph with separate red and blue channels. ... The optical path consists of a slit-mask assembly, a shutter, a dichroic with a transition wavelength around 5350 Angstroms, and two independent collimators and cameras for the blue and red sides. ... Typical DIS calibration exposures include wavelength calibration, flat fields, and bias...

... See "About ATMoB" / "Network" for more details on the clubhouse network. ... Direct viewing of a laser-pointer beam, even briefly and at a distance of a kilometer or two, has the potential to cause temporary flash blindness — the same effect you get right after a flash photo is taken — or afterimages. ... To help use our laser tools safely, the Amateur Telescope Makers of Boston, Inc. has adopted these recommendations as policy. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des actualit†йs . ... des interviews, des portraits . les plus belles images de l'Univers d†йcrypt†йes pour vous . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil La supernova de 1987 s'†йtend . ... Pour en savoir plus sur la supernova de 1987, lisez le d†йcryptage dans Ciel & Espace de septembre 2010 , page 24. ...

... This glossary is not meant to be an exhaustive list of techno-definitions. ... Is there a term you don't see here? ... Do you know how to pronounce the CONSTELLATIONS , STARS , or the PLANETS and their MOONS ? ... First Law - the orbit of each planet is an ellipse with the sun at a focus . ... LIGHT BUCKET: A common slang term for a large apertures . ... LIGHT POLLUTION: The illumination of the night sky caused by artificial light sources on the ground (streetlights, billboards, etc.) ...

... 2015 - 2016 . ... Eugene Higgins Professor of Astrophysics, Princeton University . ... December 8, 2015 . ... November 10, 2015 . ... University of the Sciences in Philadelphia author . ... Amateur Astronomer . ... 2014 - 2015 . ... June 9, 2015 . ... Digital Planetarium and the 2012 Transit of Venus from Hawaii . 2013 - 2014 . ... International Occultation Timing Association . ... 2012 - 2013 . ... 2011 - 2012 . ... Princeton University . ... Amateur Astronomers Association of Princeton, Inc., ...

. Last update: August 16, 2006 . kielkopf at louisville.edu

Data Flow System IR Camera Calibrating VISTA Data Astronomy Unit Queen Mary University of London Jim Emerson Simon Hodgkin, Peter Bunclark, Mike Irwin, Jim Lewis Cambridge Astronomical Survey Unit , Institute of Astronomy , Cambridge The United Kingdom Astronomy Technology Centre on the site of the Royal Observatory Edinburgh VISTA Data Flow Transfer function (image in, DN out) of end-to-end system so that instrumental effects can be removed from the data. ... VISTA?? ...

Characterization of Precipitable Water Vapor at the TMT Candidate Sites in Northern Chile: The Importance of Surface Data A. OtАrola T. Travouillon, M. SchЖck, S. Els, R. Riddle W. Skidmore, R. Dahl, D. Naylor, R. Querel Kislovodsk , October 4-9 , 2010 1 Outline Location of sites tested by TMT in northern Chile Synoptic-scale meteorological conditions Monitoring of ... Kislovodsk, October 4-9, 2010 16 Results: Overall & Seasonal Site Alt. (m) PWV (mm) GOES PWV (mm) Surf. ...

Supernovae 2013ej in M74 . This page is devoted to information on Supernova 2013ej in M74 . ... SEDS 2013ej page . ... Dave Storey M74 blog . Mike Richmond's 2013ej page . ... 2013/07/24.125 . ... 2013/07/24.8 . ... 2013/07/27.050 . ... 2013/07/27.127 . ... 2013/07/27.381 . ... 12.6 . ... 2013/07/27.994 . ... 2013/07/28.000 . ... 2013/07/28.142 . ... 2013/07/29.073 . ... 2013/07/29.088 . ... Ian Sharp . ... Pedro Martorell . ... Enrico Prosperi . ... Back to Bright Supernovae - 2013 . ...