... Dear FIRPO friends, I have quickly looked at the data freshly sent by Bringfried after his run at the 1.23m in the current situation of "poor" (to say the least) mirror. I have measured the SNR on two stars: V Sp K(assumed) SNR ------------------------------- 7.9 K4/5 4.5? ... For comparison, my experience from two seasons ago at the 1.23m was that the limit was K=7.5 for SNR=1. So at least for faint stars, it seems that the situation with the mirror does not preclude useful work. ...

... These are the filter transmission, the field of view (determined by the NICMOS optics external to the dewar, in combination with the HST mirrors), the reflectivities of the various external mirrors and the transmission of the dewar window. ... The sensitivity will obviously be affected by the pixel field of view. ... Finally, the optical efficiency will be degraded further by the reflectivities of the aluminum with MgF 2 overcoated HST primary and secondary mirrors. ... Primary mirror temperature . ...

Next: Release of 1 Aug. Up: Old Releases Previous: Release of 18 Nov. ... Fixed 5 Aug 1997. RCW. ... 5 Aug 1997. ... Because of the digital patch panel at the VLA and the effort by sched to understand which IFs are needed to support the specified phasing modes (VL, VR, and VA), CHNSTA is no longer needed. ... Add barrel=roll_off to the vsop setup files. ... 15Aug1997. ... Protect against requesting VLBI in non-VLBI modes at the VLA. ... Fixed keeping track of use of VLA modes. ...

... Preliminary results demonstrated uncorrected DSB noise temperature of the Nb-AlN-NbN SIR below 250 K at frequencies around 600 GHz August 30, 2006 ASC-2006 Seattle Nb-AlN-NbN SIR 3EG08 2 TELIS - TErahertz LImb Sounder TELIS Objectives: Measure many species for atmospheric science (ClO, BrO, O3, HCl, HOCl, etc); ...

Figure 10. The circles show the thermal defocus corrections that were observed on August 15, 2000. These data were derived by combining the defocus measurements seen in Figure 6 with the thermal measurements of the truss seen in Figure 7. ... I then fit the thermal defocus data given by the circles above using only the thermal time constant and an arbitrary "zero-point" constant as fit parameters. ... M1 corresponds to a thermal time constant of 0.37 hours (22 minutes) for the rods. ...

... SiD workshop, Fermilab, April 9-11 2007 April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 1 Topics 1. ... What and how was simulated What and was One column clusters effects Accepted background density Hit reconstruction efficiency Hit efficiency How to improve efficiency Conclusions April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 2 What is this April 9, 2007 Nick Sinev, SiD design Workshop, Fermilab 3 Marty's idea Shift charge in neighboring columns in opposite directions. ...

... It was discovered that it would pass about 0.02 AU (about 3 million miles) from the Earth on 1998 August 11 --- close enough to be observed by the Arecibo Planetary Radar and (at much lower S/N) by the Goldstone Solar System Radar. ... Even at this distance, the Arecibo Planetary Radar can obtain images at up to 7 meter resolution. ... This delay-Doppler image of asteroid 1998 ML14 was taken on UTC 1998 August 15 12:45. ... A higher-resolution image taken on Aug 16. ... The Arecibo Observatory . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. August 24, 1999 . A Network of Microlensing Caustics . ... In microlensing , the gravity of stars near the line of sight can act to magnify the light of background objects such as distant stars , or quasars . ... When a background quasar moves across a microlensing caustic, it can appear dramatically brighter . ... About APOD > . ...

... Archive for August 2008 . Aug 28th, 2008| 08:44 pm | Posted by hlee . ... Tags: book , computing , methods and techniques , new edition , Numerical Recipes . Category: Algorithms , Data Processing , Languages , Methods | ... Aug 27th, 2008| 08:08 pm | ... Tags: blackbody , EotW , Equation , Equation of the Week . Category: Astro , Jargon , Physics , Spectral | ... Tags: 1989 , David Mermin , EotW , Equation , Equation of the Week , formatting , Physics Today , Quotes . ...

NEWS FEDERATION rus ENCYCLOPEDIA rus HISTORY rus MIR STATION RUSSIAN . ... Cosmonauts. ... Military Space . Space Science . ... Heroes Of Space Remember . This is on-line version of Russian magazine Novosti Kosmonavtiki. This electronic version covers Russian and International space news. Those who wish to obtain the full, translated copy of an article will be charged an additional price, which varies with the size of the article. ... 2002 CosmoWorld.ru. ...

... Fittingly named The Horsehead Nebula it is embedded in the immense complex of star forming gas and dust surrounding the Orion Nebula some 1,500 light-years distant. ... Since it peaked on the other side of the Earth's orbit, however, the comet appeared only brighter than any comet in two decades. ... NGC 1850: Gas Clouds and Star Clusters . ... The December solstice brings the beginning of Winter to Earth's Northern Hemisphere and Summer time to the South! ... Consider this "star in a box". ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

... OM source rates le (output from evselect) 2. ... PPS product OM OSW FITS source timeseries 8 Algorithm subroutine omlcbuild read parameters xmmsas\_20050815\_1803-6.5.0 XMM-Newton Science Analysis System Page: 4 loop i=0, nSources get handle on source rates file get handle on source region file if (exposure IDs are different) issue warning get handle on background rates file get handle on background region file if (exposure IDs are different) issue ...

The study of energetic particles acceleration and transport within the magnetosphere and on its boundaries is the main goal of DOK-2 experiment on Auroral Probe in a frame of INTERBALL project. ... DOK-2 uses two pairs of energetic particle telescopes . ... This information is available only during the most informative Real Time mode of DOK-2. ... Full 56-57 channel spectra accumulated during time intervals from 10 s to 1464 s depending on a particle intensity. ... For this time interval: . ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

Astronomy Discussion Forums . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... Discussion Forums . ... SETI a great idea and a complete waste - brooksquest - October 3, 2007 - 13:35 UTC . ... Tholzel - tholzel - September 12, 2003 - 14:11 UTC . Here's another way of looking at it - dnj23 - August 20, 2003 - 04:44 UTC . ... SETI and TESLA - stevec - November 30, 2002 - 10:40 UTC . ... TEAM SETI X - FILES - gcypher - August 17, 2002 - 17:17 UTC . ... www.astronomy.net . ...

Next: Critical Frequencies and Gravitational Previous: Extragalactic Gravitational Wave Background . The number of binaries per frequency decade per solid angle from a separate stellar system (galaxy or cluster of galaxies) is . ... For example, for the Andromeda galaxy M31 ( rad, ) one gets . ... If the angular size of the galaxy is less than the angular resolution of the detector, the critical frequency is independent of the angular resolution, . ...

... Measurement of the MASS detectors parameters with mass program January 24, 2015 [112707] . MASS/DIMM electronics. ... Turbina-core(D): Dimm User Guide. ... N.Shatsky, V.Kornilov, The revision of the MASS/DIMM star catalogue. ... О.Возякова, В.Корнилов, Н.Шатский, Новое программное обеспечение прибора MASS/DIMM. ... V.Kornilov, N.Shatsky, S.Potanin, O.Voziakova, B.Safonov Preliminary results of astroclimate parameters measurements at the Sternberg 2.5m telescope installation site. ...

... Science . ... Science Users Information > Science Publications > Archive of the ESO Enews > ESO-Enews #6: August 2007 . ... Phase 1 Proposals . ... Instrument Pipelines . ... NEW DEADLINE FOR PROPOSALS FOR SCIENCE DEMONSTRATION OBSERVATIONS WITH MAD . ... Given the importance of finding appropriate asterisms, and in order to avoid overlap with the deadline for Hawk-I Science Verification proposals, the deadline for submission of such proposals has been postponed, and is now 10 September 2007. ...

NASA JOHNSON SPACE CENTER ORAL HISTORY PROJECT BIOGRAPHICAL DATA SHEET NAME: Sigurd A. Sjoberg O RAL H ISTORY: 8 July 1997 24 August 1998 EDUCATIONAL BACKGROUND: BS in Aeronautical Engineering, University of Minnesota, Minneapolis, Minnesota, 1942 PRE- NASA CAREER: National Advisory Committee for Aeronautics, Langley, VA Aeronautical Engineer, Langley Research Center (1942-1946) Aeronautical Research Scientist, Langley Research ... Johnson Space Center Oral History Project, Houston, TX. ...