... VLBI Schedule . ... To run a VLBI experiment, a number of independent programs need to be run. This include a program to control the telescope and IF setup, controlling the DAS and the LBADR disk recorder. The DAS is controlled by a gui. ... For each experiment determine which DAS profile is needed (the wiki guesses the profile, but this is not guaranteed to be correct). ... If starting the recorder late, or when changing disk partition during an experiment do not use the scheduled start. ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... Logout of current observing session if necessary . ... Select 'Line' from the observing modes . From the ' Choose receiver' widget: Choose ALFA & then 'Select this receiver now' . Dismiss widget . From the 'Observer's interface' select Pointing Control . Within Pointing Control click on ' catalog' . ... Leave this widget open (i.e. don't click 'dismiss') . ... Dismiss the 'New improved IFLO Control' widget. ... From the WAPP ALFA widget click on 'Configure WAPP ALFA' . ...

... The deadtime is observing- mode -dependent and the following values have been set: FIFO _DEADTIME_FF= 0.22s - dead time produced by a FIFO reset in FullFrame mode FIFO _DEADTIME_EF= 0.22s - dead time produced by a FIFO reset in ExtFF mode FIFO _DEADTIME_LW= 0.22s - dead time produced by a FIFO reset in LargeWindow mode ... 1 4 Estimated Scienti c Quality The initial values are rough estimates of the true dead time losses. ...

... Follow the steps described below in order to make a change to an investigator's email address. Navigate to the program information web page for one of the investigator's observing programs and then click on the Investigators link. ... Select Profile Request and then work through the ProPer interface for changing a person's profile. Once you have completed the profile change, ProPer will display this page which shows that a change confirmation email has been sent to the investigator. ...

Next: Reducing the observations Up: PEPSYS general photometry Previous: Influencing the plan . ... If the telescope and instrumentation are unfamiliar to you, you may have trouble keeping to the schedule for the first night or two, so try to work with a previous observer on the equipment for a night or two of training before your observing run. If you fall behind, try to keep as many low-altitude observations of extinction stars as you can, and drop some circumzenithal ones if necessary. ...

home publications > mercury . ... Astronomy Beat . ... Nearly four centuries ago, Galileo's simple observations of Earth's planetary sibling, Venus, buoyed the proponents of a Copernican universe. ... The Italian astronomer had settled into a new house in Florence and had begun to observe Venus, which in November 1610 would have appeared as an evening star, bright in the western sky after dusk. ... From these two observations, Galileo inferred that Venus must orbit closer to the Sun than does Earth. ...

... Science Users Information > Observing with ESO Telescopes > Phase 2 Preparation > Service Mode Guidelines . ... Phase 2 Instrument Table . Service Mode Guidelines . ... This page and the links in the left menu provide the general information necessary to complete the Phase 2 preparation for Service Mode programmes at the VLT/VLTI, VISTA and VST. ... All investigators assigned Service Mode time should contact the ESO User Support Department in all matters regarding phase 2 preparation. ...

... 3.1 Candidate layouts .. ... 6.1.2 6.1.3 Conceptual design of thermal control .. ... Reasons for choosing preferred layout(s) Page 5 of 6 3.2 Preferred layouts 3.2.1 Error budgets and sensitivities 3.2.2 Feasibility 3.2.3 Comparison of costs 4 4.1 4.2 Camera Selection Candidate cameras Camera evaluation 5 5.1 5.2 5.3 5.4 5.5 Conceptual Opto-Mechanical Design Layout Mechanical analyses Base-plate design Optical mount design Camera mount 6 Conceptual Thermal Design FTT-NAS ...

. Contacts . Contact Webmaster for web page errors, corrections, ommisions, and/or additions. This page last updated: September 29, 2006- JMD . This page last checked: September 29, 2004 - JMD . 3.5m Webmaster - dembicky . Observing Specialists - obs-spec . Jack Dembicky - dembicky . Bill Ketzeback - bketzeba . Russet McMillan - mcmillan . Gabrelle Saurage - gabrelle .

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Observe Every Photon's Size Experiment . ... Post Message | ... Observe every photon's size experiment . 1.The slow process of the formation of the light diffraction pattern experiment . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... The choice of the spectrograph design (Fig.2) is determined by the quantity R, the overall dimensions of the PF cage and the restrictions on the rigidity of the structure of the device. ... As the camera's objective a fast 4-lens aplanat is used having a focal distance F cam =140 mm and a relative aperture of 1:1.8, the resolution at the centre is no less than 80 gr/mm, that over the field at a distance of 3 mm from the edge along the frame ( ) diagonal is 35 gr/mm. ...

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

... Kieran Hickey of Armagh Observatory has been testing the link between increased temperatures in North-West Europe and the frequency of storms, as shown in the historical records of climate at Armagh and elsewhere. This is part of an on-going research project at Armagh into the nature of climate change in North-West Europe using long-term meteorological records. ... Some years have significantly more winter storms than others, possibly as a result of the North Atlantic Climate "Seesaw". ...

Follow-up astrometry and recoveries are made with the ANU 40 inch (1.0-m) f/8 reflector at Siding Spring Observatory (IAU code 413). ... A routine follow-up of 2003 WY153 on 2003 Dec 15 became much more than routine when a faint object with unusual motion vector was found close to the target asteroid. ... During routine astrometry with the 1.0-m to improve the orbit of the Apollo asteroid 2004 CB, the asteroid was found on March 30 to have a short tail! ... Siding Spring Survey Main Page . ...

... Spirit Pan from Bonneville Crater s Edge . ... Redshift 10: Evidence for a New Farthest Galaxy . ... What's the farthest galaxy known? ... The Nebula's glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-years away. ... Peering into a dusty nebula in nearby galaxy the Large Magellanic Cloud, infrared cameras on board the Spitzer Space Telescope recorded this detailed view of stellar nursery Henize 206 filled with newborn stars. ...

... Radio Astronomy . ... ASRAS Board Members . ... To see the most up to date news and events happening with ASRAS log in with your user name and password and then click on the Activities page. ... Messier Marathon (Member Observing) CANCELLED Saturday, April 9, 2016 9:00 PM Location:Farash Center Ionia NY . ... ASRAS Members meeting - Friday May 6 at Farash Center - Ionia NY . ... ASRAS Board members meeting - monday May 9 @ Farash Center Monday, May 9, 2016 7:00 PM Location:Farash Center Ionia NY . ...

Ground Support of RadioAstron . Control and Tracking Stations . RadioAstron satellite control (command transmission, telemetry, orbit measurements) will be conducted from Evpatoria and Bear Lake control stations. ... Coarse orbit measurements will be carried out from control stations. Each measurement takes ten minutes. ... Orbit measurements at tracking stations give only radial component of spacecraft velocity but the measurements are going continuously during observing sessions. ...

... Next, the screen displays "Press 0 to align or Mode for Menu." Press "0" if you wish to begin Automatic alignment (or Easy Align, depending on your telescope model), or press Mode if you wish to choose a manual alignment method ("Automatic Alignment" displays, and you can press MODE to go through the menu to find other alignments). ... Note: If you press the "?" key while "Ctr Brightest Star" displays, the alignment star that AutoStar has chosen will display. ... Alignment successful" displays. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 October 15 . Mysterious Changing feature on Titan . Image Credit: Cassini Radar Mapper , Cornell , JPL , ESA , NASA . Explanation: What is that changing object in a cold hydrocarbon sea of Titan? ... Subsequent observations in 2014 found the object remained -- but had changed! ... About APOD | ... A service of: ASD at NASA / GSFC . ...