Fundamental parameters and time evolution of mass loss are investigated for post-main-sequence stars in the Galactic globular cluster 47 Tucanae (NGC 104). ... We confirm the cluster's distance as d = 4611+213 -200 pc and age as 12 ТБ 1 Gyr. Horizontal branch models appear to confirm that no more red giant branch mass loss occurs in 47 Tuc than in the more metal-poor Я? Centauri, though difficulties arise due to inconsistencies between the models. ...

... Credit Copyright: Nicolюs Villegas Explanation: Large galaxies and faint nebulae highlight this deep image of the M81 Group of galaxies. ... Around the image many other galaxies from the M81 Group of galaxies can be seen, as well as a lucky satellite glint streaking across the image left. ... This whole galaxy menagerie is seen through the faint glow of an Integrated Flux Nebula , a little studied complex of diffuse gas and dust clouds in our Milky Way Galaxy . ... Galaxy Wars: M81 versus M82 . ...

An ephemeris can be calculated with different accuracy. Calculation accuracy dialog presents three modes of accuracy. One can calculate position of a minor planet by the formulae of elliptic motion starting from the fundamental set of elements for given minor planet. ... Also there is possibility to calculate positions taking into account perturbations from different sets of perturbing bodies by numerical integration ( Integration mode). ... Accuracy of integration is equal to 10**(-10) AU. ...

The seminar is supported by the grant of Federal Programm "Integration" . ... A.V.Ivanchik, A.Yu.Potekhin, D.A.Varshalovich "Testing of possible cosmological variation of fundamental physical constants by analyses of QSO spectra" . ... Based on high-resolution measurements of quasar spectra, we obtain the following direct limits on the average rate of the cosmological time variation of the fine-structure constant alpha : . alpha'/alpha| -14 yr -1 . It is the most conservative limit. ...

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing Podcasts . ... Astronomy for Kids . ... Galaxies and the integrated flux nebula in Ursa Major . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Next: Introduction . ... A spike immunity method of digital integrating radiometer signals in the jamming environment is described. ... The purpose of the method is real-time signal processing, and the basic is an alternative selection of the least offset signal estimation using nonparametric "Nearest Neighbor" rule. ... The additive spike-like jam makes the "tails" of the distribution "heavier" which leads to different offsets for linear and rank mean estimation on the integrating interval. ...

... Science Users Information > Observing Facilities > Instrumentation Development > Integration Cryo-Vacuum . ... Integration Cryo-Vacuum . ... MAD . ... Semented Mirror . ... Paranal Instruments . ... ESO Departments . ... July 2010 . ... October 2008 . ... Jan 2008 . ... Our department has been involved for many years in the first generation VLT instruments. ... MAD first MCAO ever . ... This visitor instrument was fully integrated uder the responsibility of the integration and cryo-vacuum department...

... 4 A I. I NTRODUCTION AND BACKG ROUND A Superconducting Integrated Receiver (SIR) [1] comprises on one chip a low-noise SIS mixer with quasioptical antenna, an Flux-Flow Oscillator (FFO) acting as a Local Oscillator (LO) and a second SIS harmonic mixer (HM) for the FFO phase locking (see Fig. ... In the SIR the bandwidth is determined by the SIS mixer tuning structure and the matching circuitry between the SIS and the FFO. ...

... 2008 May 12 . The M81 Galaxy Group Through the Integrated Flux Nebula . ... Explanation: Large galaxies and faint nebulae highlight this deep image of the M81 Group of galaxies. ... Around the image many other galaxies from the M81 Group of galaxies can be seen. ... This whole galaxy menagerie is seen through the faint glow of an Integrated Flux Nebula , a little studied complex of diffuse gas and dust clouds in our Milky Way Galaxy . ... About APOD | ...

. Next: Pulse Widths Up: Integrated and single pulse Previous: Integrated and single pulse . љ . Huge variations from pulse to pulse . Integrating several 100 forms a stable profile . Integrated profiles differ widely . Basic model includes core + cone . Slice in different ways to get various profiles . љ љ . Figure 54: Integrated pulse profiles . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

... Previous message: [sas-uploads] Scheduled downtime for SAS integration systems . ... -84-15 --089e013a282c77c89604dfe251e2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable div dir=3D ltr div class =3D gmail_default style=3D font-family:georgia,= serif;font-size:small Dear colleagues, / div div class =3D gmail_default s= tyle=3D font-family:georgia,serif;font-size:small br / div div ...

... Gallery . ... Guests in the Integration Hall . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . ... Title: Guests in the Integration Hall . Description: NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. File name: Guests in the Integration Hall.jpg . ... Guests in the Integration Hall NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ...

... correaltor dump time) * (number of cycles per integration) The smaller you make this number (albeit you aren't allowed to go below 1ms) the larger your data file will be. So, if you are in a RFI-free frequency range, you may want to set your integration time to as much as 60s. However, if you are in a zone often affected by RFI, you may want to set this to be a much smaller values, say, 1s. koneil@naic.edu ...

... The "ATLAS Aerospace" company invites all the volunteers to pass a course of space training in the simulators of the Yuri Gagarin Russian State Scientific-Research and Test Center of Cosmonaut Training. ... The main simulators, trainers and stends are: . ... Don - 732" specialized simulator, which is used for a crew training on manual-mode control of the "Soyuz-TM" space vehicle and its systems in the course of approach and docking to the orbital station; . ...

... The Story of the Christmas Star continues in Northern Ireland: on Friday 11 December 2009, at the Windmill Integrated Primary School in Dungannon. During the UNAWE Astro-Art Fun workshops, held by Miruna Popescu from Armagh Observatory, the children have listened to the story and then made their own interpretation of the story on the individually designed Christmas cards and creative paintings. ... International Year of Astronomy, Ireland National Node . ...

... Astrophysics Group . ... Integration of the NIRSpec instrument . ... SKA AAVS0 array . ... One of the major milestones for the James Webb Space Telescope (JWST) has been, in September 2013, the completion by ESA of NIRSpec, the first multi-object spectrograph to be operated in space. ... Cambridge, and in particular the Cavendish Astrophysics Group and the Kavli Institute for Cosmology, is heavily involved in NIRSpec by hosting one of the Instrument Science Team members (R. Maiolino). ...

... Appropriate values of DIT the integration time (DIT secs) for each individual integration, are lmited by various considerations. N.B. Ndit individual Integration s each of DIT secs are coadded to form a single Exposure of time Ndit*DIT]. The recommended minimum DIT is one sec (the minimum possible exposure time) or the value at which the noise becomes sky (rather than detector) limited. ... The recommended maximum DIT is such as to keep the detector wells less than half full. ... 40 sec . ...

... Features . ... The C2400-75i is the simplest CCD camera for fluorescence imaging. A 1/2 inch Hyper HAD CCD chip provides good signal to noise images in all light conditions. ... Combined with the frame grabber in the ARGUS-20 Image Processor and realtime background subtraction features, high quality fluorescence images are produced very economically. ... Hyper HAD CCD with On-Chip Integration . Fluorescence image acquisition with the ARGUS-20 Image Processor . ... Sample Images . ...

... Galactic Cirrus (Integrated Flux Nebula / IFN) - газопылевая туманность MW 3 Volcano Nebula в созвездии Большой Медведицы (Ursa Major) .. ... Просмотр полной версии : Galactic Cirrus (Integrated Flux Nebula / IFN) - газопылевая туманность MW 3 Volcano Nebula в созвездии Большой Медведицы (Ursa Major) .. ... Galactic Cirrus (Integrated Flux Nebula / IFN) MW 3 Volcano Nebula .: ... Galactic Cirrus - гигантские газопылевые облачные агломерации (interstellar cloud of dust), часть межзвездной среды .. ...