Summary of SPHERE performance at NIH Ralf Siebenmorgen (PS) and Markus Kasper (PM) SPHERE performs in the NIH similar to what was achieved in Grenoble. ... IRDIS The IR and V filters are well mounted and the positioning accuracy is within a 1% pixel tolerance. ... The IRDIS detectors have a read-out noise 9.4 e-, a gain of 2e-/ADU and the dark current is <0.5e-/pixel/s. The instrumental background is still high. ... Centering of the pupil is achieved at an accuracy of 0.1% of the pupil diameter. ...

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• Open a data file
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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... A fixed-term Research Technician position is available at the Armagh Observatory funded by the Europlanet Research Infrastructure (RI) under the Seventh Framework Programme of the European Union (EU). ... For these purposes, there will be regular meetings of the technician with the PI at the Observatory, several per week during the initial phases of the project and a minimum of 1 per week thereafter. ...

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• The planetary conjunction of Venus and Jupiter at their closest | International
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• Photos from John McConnell | International Year of Astronomy in Ireland |

This looks familiar, vaguely familiar, . Almost unreal, yet, it's too soon to feel yet. Close to my soul, and yet so far away. I'm going to go back there someday. ... Is that a song there, and do I belong there? ... Come and go with me, it's more fun to share, . ... There's not a word yet for old friends who've just met. Part heaven, part space, or have I found my place? You can just visit, but I plan to stay. ...

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. Previous slide . Next slide . Back to first slide . View graphic version .

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• Roof closed before the rain starts, and members inspect the 'scope
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You don't need your own Voyager to see the solar system. You can see much of it from your own back yard. ... If you enjoyed The Nine Planets , go outside and take a look at what you just read about. ... Touring the Universe through Binoculars . ... Refer to Sky & Telescope or a similar magazine for up to date positions or check one of the several Web sites that show planetary positions. ... You can see 99.99% of the mass of the solar system with no instruments whatsoever: . ... William Herschel . ...

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• APOD: 2006 December 27 - IC 5067: Emission Nebula Close up
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... The most spectacular view however is from space, where large areas of aurora can be observed simultaneously, even the entire polar cap. ... Such pictures often show a continuous ring of aurora around the polar cap (picture above), caused mostly by electrons leaking out along magnetic field lines, from the plasma sheet of the Earth's magnetic tail. ... Field lines from the auroral oval are believed to lead to the plasma sheet. ... A near-Earth circular polar orbit has many uses. ...

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Y ou don't need your own Voyager to see the solar system. ... Refer to Sky Telescope or a similar magazine for up to date positions or check one of the several Web sites that show planetary positions. ... You can see 99.99% of the mass of the solar system with no instruments whatsoever. ... Jupiter . ... Mars . ... For $200 you can get a far better optical instrument than Galileo or Newton had. ... Date . ... William Herschel . ... O f course, the solar system has more than just planets and moons. ...

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... The tracking (i.e. unguided) performance of the United Kingdom Infra-Red Telescope (UKIRT) relies on the accuracy of its 24 bit absolute encoders. These have been long known to generate two systematic errors. The first is a periodic error resulting from the encoder deriving the last 8 resolution bits by interpolation between the rulings on its code disk. ... To estimate the measurement errors we introduce a periodic filter to model and a Kalman filter to model . ...

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• ADASS 2002 Conference Proceedings
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. Note: this is an archived version which has been superseded. The current SNR catalogue is at http://www.mrao.cam.ac.uk/surveys/snrs/ . Instructions: . Select a SNR from the list on the left to browse individual remnants (or press the "back" button on your browser). Clicking on the image above will jump to a position in the list close the chosen longitude in Galactic plane.

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• PPT Slide
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. Pulkovo NEO Page . Central Astronomical Observatory at Pulkovo . of Russian Academy of Sciences, St.-Petersburg, Russia . Apparent Close Approaches of Near-Earth Asteroids to the Stars for April 2016 . By these observations it is possible to obtain the positions of asteroids with higher accuracy. This page includes the ephemerides of such phenomena for some observatories, namely: . Pulkovo . CrAO . Kourovskaya . Majdanak . Pulkovo Obs. Mountain Station . Mondy .

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hstpolsim -- Produce simulated polarization input data frames for HST instruments . ... inint = "" [name] . ... Name of the HST instrument for which simulated polarization images are to be produced. ... Name of the instrument specific polarizing filter for simulated images (ignored for SPECIAL instrument). filtname = "" [name] . Name of the instrument specific colour filter for simulated images. ... The header parameter FILTER provides the filter name and POLANG the polarizer angle. ...

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. Currently . student of the 5th course of Moscow Institute of Physics and Technology . Field of research interest . Network software developing, Image processing. Position . Laboratory assistant of Space Research Institute . Department Number . 902 (Space Monitoring Information Support) . Postal Address . Space Research Institute . Russian Academy of Sciences . Profsoyuznaya St. 84/32 . Moscow, RUSSIA . Postal Code . 117810 . Telephone Number . +7(095) 333-53-13 . E-mail . ugine@d902.iki.rssi.ru .

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• Proshin Andrej, Space Research Institute (SRI)
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Astronotes Armagh Planetarium's Stellar Blog! ... Stars . Exoplanets . ... Space Flight . ... Posted on October 17, 2012 | ... Continue Reading.. Posted on August 14, 2012 | ... Posted on July 17, 2012 | ... Posted on March 29, 2012 | ... 3 Comments What exciting space events has 2012 in store for us? ... 5 Comments Once exoplanets, worlds orbiting other stars, were the stuff of science fiction but now we know of literally hundreds of real alien planets circling other stars. ...

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• Getting back up to speed | Astronotes
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... Application to foliations and contact structures in dimension 3 The concept of open bo ok decomposition go es back to H. Winkelnkemper (1973) and, according to old works by J.W. Alexander in the twenties, every closed orientable 3-manifold admits such a decomposition. ... But, these foliations and contact structures are co-orientable, since the normal bundle to a an open bo ok (which makes sense despite the binding set) must be trivial. ...

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• Moscow Center for Continuous Mathematical Education - Independent University of

Note: you can click on a picture to see it enlarged ...you float into the ODS (Orbite Docking System) from Shuttle's airlock through tunnel extension ( also serves as EVA airlock ). The tunnel leads further to the Shuttle's back where Spacelab is placed. ... You move upwards.....and see a closed hatch. It's time to open it! Yet another closed hatch - but it's not the Shuttle's, it belongs to the Russian space station Mir. Open it - and you are in the Mir's docking module . ...

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... The versatile and efficient INVERTOSCOPE? combines the highest optical performance with unsurpassed mechanical quality, and is backed by LOMO's unique lifetime warranty, the most comprehensive in the industry. ... A 15X focusing eyepiece with two interchangeable reticles (a 10mm/100div scale and a 10mm x 10mm/400sq grid) for convenient measuring and counting. ... A set of stage inserts and extension plates to accommodate a variety of sample vessels such as Petri dishes, flasks, microtest plates, etc...

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• Three Position Interference Slider
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... Bit . ... Status . Event Time . ... Bits . closed . ... Roof Position . ... automatic . ... 0D:18H:51M:32S . swmode=AUTOMATIC . Roof System . ... 18D:16H:51M:51S . OK SunAltOpen: -1.000000, SunAltClose: -1.000000, SunNow(Alt,Az): +65.769951,-168.421600 . Time of Last Reboot: 29 Days, 21h:28m:00s . Time of ObsDaemon Reboot: +2457458.4259953703731298 (uptime: 29 days, 21h:26m:24s) . ...

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... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... 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 . ... Astronomy for Kids . ... Maximize a minimum filter . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• filter | Astronomy.com
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• Using filters | Astronomy.com

grdfft - Perform mathematical operations on grdfiles in the frequency domain grdfft in _ grdfile -G out _ grdfile [ -A azimuth ] [ -C zlevel ] [ -D [ scale |g ] ] [ -E [ x|y ][ w ] ] [ -F [ x | ... The horizontal dimensions of the grdfiles are assumed to be in meters. ... Append a scale to multiply by (kr * scale ) instead. Alternatively, append g to indicate that your data are geoid heights in meters and output should be gravity anomalies in mGal. Default is no scale]. ...

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• The Focal Plane Instruments
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... Multiexposition 34 images Sun 1/1000 sec f/22 and 1 image background. ... It shows position of the Sun on the sky in the same time of a day during one year. Analemma - a trace of the annual movement of the Sun on the sky - is well known among experts of sun-dials and old Earth's globes as a diagram of change of seasons and an equation of time. ... Previously, the position of the Sun on the sky was calculated with computer as well as optimal moments of time for taking each of the exposures. ...

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