CATS home ] [ Back to CATS list ] [ ftp ] . ... 53Swarup+ list 1 ADS . ... The paper also included a breif summary of the 293 sources whose occultations were observed with the Ooty radio telescope during 1970-71. ... A resolution of Ooty Lunar Occultation observations of 122 radio sources at 327 MHz: List 8 . ... 91Singal: Ooty list 10 Ooty lunar occultation survey of radio sources We present here accurate radio positions and the arcsec angular structural infirmation for 239 radio sources. ...

FGS Instrument Handbook for Cycle 24 . ... Fine Guidance Sensor Instrument Handbook for Cycle 24 > Chapter 5: FGS Calibration Program > 5.3 Linking Transfer and Position Mode Observations . ... Observations . ... As was mentioned in Section 3.4 , by using Transfer mode observations to determine a binary system?s true relative orbit, and using Position mode observations of nearby reference stars (and perhaps the binary as well) to determine the binary?s parallax, the system?s total mass can be derived. ...

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

... We will consider the rms, (K), for observations with a receiver of system temperature, T , frequency resolution, per polarization, and total integration time per observing cycle, . ... For ``in-band'' frequency switching, the line under investigation is always in the observing band. ... Position Switching or ``Out-of-Band'' Frequency Switching: Here the line is only observed for one half of the time, with noise being present all of the time. ...

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. ...

... High spectral, spatial and temporal resolution UV observations of the quiet Sun transition region show a highly structured and dynamical environment where transient supersonic flows are commonly observed. ... Estimates of the kinetic and enthalpy fluxes associated with these events show that explosive events are not important so far as solar coronal heating is concerned. ... In some cases, non-Gaussian line profiles are associated with supersonic flows in small magnetic loops. ...

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

Spatially Resolved MidIR Observations of the Disk Surrounding Par 21 Mario van den Ancker 1 1 European Southern Observatory, KarlSchwarzschildStrasse 2, D85748 Garching bei MЭnchen, Germany 1. Introduction The small group of YSOs known as FU Orionis stars provide striking evidence for the importance and irregularity of disk accretion during early stellar evolution. ... Fig. ... Par 21 is clearly resolved into an elongated structure with a size of a few hundred AU (Figs. ...

... For each observed position the table contains designation of object as in file of observations, the time of observation, the number and name/ preliminary designation of minor planet supposedly identical with observed object, the values of O – C (observed position minus computed one) in right ascension and declination expressed in arcsec, the difference O – C between observed magnitude and computed one, the code of observatory in the Observatory list (see Observatories section). ...

Since the 1980s VLBI observations at two frequencies, 8.4 (X-band) and 2.3 GHz (S-band) have been used to locate the positions of compact radio sources with unprecedented accuracy. ... Observations of selected strong compact extragalactic radio sources, using this now mature technique, have been used to define and maintain a radio reference frame with sub-milli-arcsecond (mas) precision. ... Additionally, it will provide more reference sources for phase referencing VLBI observations. ... References . ...

... There are result from two global VLBI observations at 3.6 cm spaced about 2 years. ... The analysis of the apparent motion, indication of the jet flow trajectory and the other implications for the CSS quasars are discussed. ... The quasar 3C380 ( ; thus 1 arcsec corresponds to 4 kpc for , ) is one of the most powerful radio sources (its radio luminosity at 2.7 GHz is ) ( Wilkinson et al. ... 3C380 is a member of the class of Compact Steep Spectrum (CSS) sources. ...

... Herschel Mission . ... Water along the outflow from a young nearby protostar: a Herschel view . ... Figure 1 shows a detailed view of the IRAS4A outflow through the comparison between the H 2 O emission and the emission from several other molecular tracers of gas with different excitation conditions: H 2 , CO(3-2), CO(14-13), and CO(6-5). The figure nicely reveals where shocks deposit energy into the molecular cloud, lighting up the water emission along the outflow . ...