... Also, the NIRCam pixels are just large enough to Nyquist-sample the PSF at 2 m. Shortward of this, the PSF is undersampled. ... Figure 1 shows the NIRCam PSF as observed through five different filters in the Short-Wave Channel: F070W, F090W, F110W, F150W, and F200W. In the top row, we show the "instrumental" PSF: the infinite resolution PSF as it hits the detector. ... The shorter-wavelength PSFs capture about 25% of the light in the central pixel, while the longer-wavelength PSF capture about 15%. ...

... A growing collection of images showing progress with the Telescopes and Telescope Domes restoration project is available on the Armagh Observatory web-site (see star.arm.ac.uk/history/Domes/ ). The project has been progressed satisfactorily and close to its original budget. ... The outer copper skin of the dome has been replaced with new pre-patinated copper sheeting. ... The Sinden Optical Company has made considerable progress with the restoration of the 1835 Grubb 15-inch reflector. ...

The construction of NIFS is progressing well with preparations in hand for the next two cooldowns. The detailed design of all the NIFS mechanisms has been completed and the mechanisms are under construction. ... The NIFS OIWFS filter/aperture wheel and OIWFS gimbal mechanism have been manufactured by the University of Hawaii and delivered to the Australian National University. ... Vinko Medic polishing the OIWFS optable in preparation for cold-testing the NIFS mechanisms in the cryostat. ...

... Science User Portal . ... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Travel and Contacts . Travel to ESO Headquarters . Travel to Vitacura Office . ... Travel to E-ELT Armazones . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... Telescopes Instruments . ... UVES . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... E-ELT Instruments . ... ESO Science Outreach Network . ...

... Tonight's Sky . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing springtime deep-sky objects with a large telescope . ... GLAST nears completion . ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter...

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

... HOME . ... Richard J. Edgar, Project Scientist . DXS, the Diffuse X-ray Spectrometer instruments were flown on the STS-54 mission of the Space Shuttle Endeavour in January of 1993. ... A Summary of the First Results from the Diffuse X-ray Spectrometer Experiment . ... In January of 1993 the Diffuse X-ray Spectrometer (DXS) instruments flew on the STS-54 mission of the Space Shuttle Endeavour. ... The DXS x-ray spectrum from the diffuse background in the constellations of Puppis and Auriga. ...

... U. Amsterdam Explanation: The GRB distance scale controversy may have just ended with a flash . Gamma Ray Bursts (GRBs) are powerful explosions occurring in seemingly random positions on the sky. ... There they found a faint but variable optical source : a potential counterpart to the gamma-ray burst that was getting brighter. Most importantly, continued scrutiny showed that this optical transient had absorption lines with a redshift of about 0.8 - the distance scale of galaxies and quasars . ...

... May 13, 1997 . Optical Transient Near GRB970508 Shows Distant Redshift . ... Explanation: The GRB distance scale controversy may have just ended with a flash . ... Most importantly, continued scrutiny showed that this optical transient had absorption lines with a redshift of about 0.8 - the distance scale of galaxies and quasars . ... Above is a "negative" image of the GRB970508 field , located near the north celestial pole, taken hours after the initial flash of gamma rays. ... About APOD > . ...

... Space Research Institute . Main . ... Main results of the experimental and theoretical research completed in 2010 . ... Moon's topography is shown based on LOLA laser altimeter data, white contour shows a permanently shadowed region and a white rhomb indicates LCROSS spacecraft impact location. ... Ultra deep survey of the sky in hard X-rays, performed by INTEGRAL observatory . INTEGRAL observatory has completed the first and the most sensitive survey of the sky in hard X-ray energy band. ...

K-band Arcetri Obscured Supernova Search . What is the KAOSS Project? W hat is the KAOSS Project? Some recent surveys aimed at detecting Supernovae (SNe) in the optical have found that starburst galaxies do not show evidence for an enhanced SN rate, with respect to quiescent galaxies (Richmond et al. ... A similar result was obtained by Navasardyan et al. (2001) who looked for SNe in interacting galaxies, finding no evidence for correlations between SN rate and galaxy properties. ...

... Norm Oberle being reflected by one of his . ... The 31" mirror at the . ... It was through Norm's classes that I made my own two telescope mirrors described elsewhere on this site. ... Soon he made his first first telescope. ... Norm was one of the charter members and organizers of Cuyahoga Astronomy Club and its first president. ... In 1968, Norm formed the LEAP Project (Lake Erie Astronomical Project) partially an out growth of the telescope making class and astronomy meetings at the planetarium. ...

... On 04jan01 through 08jan01 a number of calibrator sources were tracked using the sband narrow receiver at 2380 Mhz and the standard calibration pattern (4 cross scans at 45 degrees to one another). ... Figure 1 shows the point source gain in K/Jy versus azimuth angle. ... Figure 2 shows the same point source gain in K/Jy versus zenith angle with the bottom plot coming from the sep00 run. ... The ratio of the beam efficiency to the point source gain is independent of the source flux. ...

... SEARCH ASP SITE: Match ALL words Match ANY word . ... Comet Hyakutake wowed us this spring [see Guest Observer, May/June, p. 11]. ... The best time to observe a meteor shower is after midnight, as your nighttime location moves head-on into the path of the cometary debris. ... As observers, we are interested in the number of Perseids per time interval. ... Tabulate the number of meteors observed per interval, and make sure to label the table with the local time and date of each interval. ...

... Previous: Model Based Corrections to Data from Radiation Damaged Detectors. ... Pound, M. W., Wolfire, M. G., & Amarnath, N. S. 2003, in ASP Conf. ... A large set of physical parameters and dust types are included in the model database, which contains over 500,000 models. ... The model outputs are averaged over the instrument bands using the same weighting ( constant) as the SIRTF data pipeline which allows the SIRTF data products to be compared directly with the model database. ... 2003). ...

... They cover a period of 4 days in which the Supernova continues to rise in brightness (what astronomers call magntiude). ... First Image Taken on March 11 at 8:22 UT. Second Image Taken on March 12 at 8:52 UT. ... The supernova is the same brightness as in the previous image taken 2 hours ago . ... This image, taken 24 hours after the previous image, shows the supernova to be another 0.21mag (or about 25%) brighter. ... Hopefully the images do show that the brightness of the Supernova is changing. ...

... MOUSER Over View . The design of a new generation fast spectrograph MOUSER (Multi Object Universal Spectrograph for Extragalactic Research) to be installed at the 6 m telescope is proposed. ... photometric observations in broad and narrow spectral bands with a 6'x6' field of view and an image scale of 0".30/pixel; . ... The spectrograph is to be installed on the field rotator of the 6 m telescope prime focus without a standard field corrector. ... Back to Laboratory Home Page . ...

AMAZING ARMAGH PLANETARIUM FACTS Over 1.65 million people ­ more than the population of Northern Ireland ­ have visited Armagh Planetarium. ... Armagh Planetarium was the first planetarium in the world to show moving images by projecting video on the dome. ... When Halley's Comet last visited our skies in 1986, Armagh Planetarium offered free admission to anyone who had saw the comet in its previous appearance in 1910! ... Armagh Planetarium is simply the best planetarium in the World ­ ever! ...

... 32-inch Milligan Relay telescope . ... Thursday, Feb 11, 2010 at 8:00 PM . ... The February meeting will be a "Member Show and Tell Night". Four members have stepped forward to talk on some of their telescope making and observing projects. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Other Monthly Meetings . ... Feb . ... Monthly Meetings . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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