... W. Steffen , T.P. Krichbaum , S. Britzen and A. Witzel . ... Such oscillations can result from precession of the jet, helical magnetic fields, or helical instabilities. ... VLBI monitoring of the milliarcsecond scale structure shows stationary components at about 5, 1.4 and 0.4 mas separation from the core ( Eckart et al. ... The accumulated VLBI data show that the observed components and the continuous jet structure are aligned along a curved, oscillating ridge line (see Figure 1 ). ...

The Cycle 11 calibration program will be defined a few months after the Phase II deadline for approved programs. ... In special situations it is possible that observers may find the STScI calibration programs do not meet their needs. ... In these cases observers may propose to obtain their own calibration data. ... During Cycles 9 and 10, two WFPC2 Calibration Outsource programs were awarded. ... Results of both programs will be disseminated via the WFPC2 WWW site, as results become available. ...

... INSTRUMENT: SurveyCam FILTERS: Stromgren uvby, 2" square COMMENTS: remote observations are expected BRIEF SCIENCE JUSTIFICATION: Last decade numerous faint structures at the periphery of regular galaxies, as arcs, tails, or streams, have been discovered (see e.g. Martinez-Delgado et al., ... The broad-band photometry is used for observing the faint structures, but it does not allow to break the age-metallicity degeneracy efficiently. ... The standard Stromgren set is available at APO. ... 2014). ...

Full Stokes 327-MHz Continuum Observations of the GALFACTS Pilot Region Wasim Ra ja, Avinash Deshpande, Tapasi Ghosh, Chris Salter & Andrew R. Taylor Background and Scientific Justification Several existing surveys have mapped the polarized intensity of the extended Galactic emission at various frequencies using single dish as well as synthesis imaging. ... The underlying distribution of the polarized emission and the magneto-ionic medium would be apparent in the images resolved across Faraday depth. ...

... 227Wink This paper containes an investigation of 91 sources which appear to be point sources when observed with the angular resolution of the 100-m telescope at 4.9 GHz, teta_a = 2.6', and which we expected to be HII regions. The basic search list was prepared from the 4.9 GHz survey of the galactic plane by Altenhoff et al. ... In the present paper we list 4.9 GHz flux densities only for sources for sources for which we present new observations. ... source structure indicated . ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... Flights Chronology . ... Project History . ISS Russian Segment . Steps of ISS Assembly . Spaceflights Chronology . Chronology of Extravehicular Activity . ISS 45/46 . ... Rocket Space Complexes . ... Launches Chronology . ... Automatic Space Systems . ... HISTORY . ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

XMM-Newton CCF Release Note XMM- CCF -REL-176 RGS QUANTUMEF Shortest-Wavelength Correction Factors A.M.T. Pollock July 27, 2004 1 CCF components Name of CCF VALDATE List of Blocks changed XSCS ag RGS1 QUANTUMEF 0013 1998-01-01T00:00:00 RGA EFFAREACORR NO SI1 SI2 SI3 SI4 SI7 RGS2 QUANTUMEF 0014 1998-01-01T00:00:00 RGA EFFAREACORR NO SI1 SI2 SI3 SI4 SI5 SI7 2 Changes Near the short-wavelength end of the RGS bandpass, the instrument ... The best- t power-law indices, , are shown. ...

Next: Transparency of the Stochastic Up: Model of the Galaxy Previous: Frequency distribution of galactic . ... The parameters of the model resulted from a numerical fitting of various data, such as the observed distribution of the young star population and neutral hydrogen, the density of population II stars in the vicinity of the Sun, the galactic rotation curve and the dynamics and distribution of globular clusters   and dwarf irregular satellites of the Galaxy. ...

Lunar occultation of the quasar 3C273 observed on Calar Alto Christoph LeinertН , Klaus MeisenheimerН , Andrea Richichi Н MPI fur Astronomie, Heidelberg, О ESO, Garching ? О In lunar occultations, high spatial resolution information on the object is contained in the occultation light curve. ... Two Saros cycles later, on May 31, 2001, 19:59 UT, again a lunar occultation occured, this time observable from Calar Alto. We wanted to take advantage of this opportunity by near-infrared observations. ...

... In this section, we develop a physical model of the secondary as a disk that is centrifugally supported in the radial direction and hydrostatically supported in the vertical direction. We assume that the disk is vertically isothermal and well mixed. ... where is the mean molecular mass of the gas, is the orbital period at the outer edge of the disk in years, and all of the mass of the secondary has been assumed to be concentrated near its center, so the Keplerian approximation is valid. ...

... EXPN DNO D A T E UT TIME FQ SOURCE CORR-Telescopes VT734 355-MO Dec 21 08:00-21:00 C TAU-A Pointing VT735 356-TU Dec 22 08:00-21:00 C TAU-A Pointing VT736 358-TH Dec 24 09:00-20:00 K ORIONKL Pointing VT737 359-FR Dec 25 09:00-20:00 K ORIONKL Pointing VT738 360-SA Dec 26 09:00-20:00 C 0528+134 Mitk-UD KA SH W018c 364-WE Dec 30 06:00-15:00 L 0552+398 Socr-VLBA W071n 6-WE Jan 06 10:00-17:00 L J0745+10 Mitk-AT HO MP UD SH KA W059e 7-TH ...

DFS Trouble Shooting . ... According to symptoms usually observed by users, the most probable causes are described, and corresponding solutions proposed. First symptom as it can be observed by a user . Optional) Second symptom as it can be observed by a user First possible cause . Optional) Second possible cause First proposed solution: Describe step by step the procedure to fix the problem. ... Optional) Second proposed solution: Describe step by step the procedure to fix the problem. ...

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

Blackholes2 Forum Message . ... Post . ... Shifts Are As Would Be Expected. ... Post Message | ... Red and blue shifts can be caused by velocities also. ... The expectd result would be a red or blue shift proportional to the aparent distance an object is from the observer. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Astronomy Picture of the Day . Rays from an Unexpected Aurora . ... 20.11.2005 . ... For starters, on this Friday morning in August 2002, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Mirroring the green rays is a red band, somewhat rare in its own right. ... November 2005 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: aurora . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Comet C/2011 L4 (PANSTARRS) on 2012 August 9th. Images obtained using the Faulkes Telescope South, operated by Las Cumbres Observatory. The Faulkes Telescope Project and Las Cumbres Observatory Global Telescope Network kindly gave us the opportunity to use the Faulkes Telescope South in 2012 August. ... More astronomical projects with the Faulkes Telescopes . Last Revised: 2012 August 13th . ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2008 January 1 . Rays from an Unexpected Aurora . ... Explanation: This aurora was a bit of a surprise. ... Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Note: A German language mirror of APOD is now available . ... NASA Official: Phillip Newman Specific rights apply . ...

... Space Research Institute . Main . ... Main results of the experimental and theoretical research completed in 2009 . ... Direct Measurement of the Contribution of Point Sources to the Galactic Ridge X-ray Emission in Record Deep Observations by the Chandra Observatory . ... These demonstrate that electrons generating hard X-ray intensity have been an initiator and main source of flare plasma heating, the particle acceleration and the plasma heating is a system with positive feed back. ...

... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... First galaxies were born much earlier than expected . ... Using the amplifying power of a cosmic gravitational lens, astronomers have discovered a distant galaxy whose stars were born unexpectedly early in cosmic history. ... However, the newly discovered galaxy has dramatically different features from other distant galaxies that have been observed, which generally shine brightly with only young stars...