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... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... PULSE@Parkes . ... The project does not assume any detailed prior knowledge of pulsar astronomy though students should have studied astronomy as a component of Stage 4 Science (Years 7-8). ...

90%) of STIS and WFPC observations. Assuming no interaction with non-MAMA visits, we find that the maximum sustained MAMA orbits scheduled per week can be no greater than 41. Including interactions between MAMA and non-MAMA visits, and assuming the structure of non-MAMA visits is changed to make them more schedulable in SAA-intersected orbits, the maximum sustained number of MAMA orbits per week is 33. ...

... 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. ...

PHYSICS Part IA Wednesday 19 January 2009 SELWYN COLLEGE REVISION TEST Attempt all three questions from section A and any two from section B. SECTION A ­ answer all questions. ... 5] A2 A3 SECTION B ­ answer two questions B4. ... 5] A uniform solid cylinder rolls from rest without slipping down a rough inclined plane, then along a horizontal section where the surface texture changes from rough to smooth, and finally up a second inclined plane with a perfectly-smooth surface. ...

... Searching for Far Out and Wandering Worlds . ... The Real Reality Show: Would aliens be anything like us? ... The SETI Institute is after alien signals. Assuming another world is beaming a 1-million-watt radio signal in our direction, how far away can that source be before the signal is lost in intergalactic noise? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

For non-spherical isotropic particles, the classic variant of the RDG approximation does not include the anisotropy of the shape and hence does not give the correct Rayleigh limit, say, for small ellipsoids. ... We call this variant a modified RDG approximation (MRDG). ... First, the MRDG leads to the correct Rayleigh limit. ... The second approach to generalization of the RDG is connected with the use of the Born iterations for the scattering integral equation [ 95 , 124 , 132 , 264 ]. ...

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...

... List of SAS threads . This thread contains a (very!) simple standard XSPEC session for fitting data from the X-ray cameras. ... Start XSPEC . ... Load spectrum data: . ... response 1 PN.rmf . ... plot data . Fig.1: XSPEC data plot . Ignore bad channels in data: . ... The latter, the maximum number of channels to bu summed. plot data with model adjustment and e.g. the residuals (alternatives, ratio data/model, absolute chi-squared, etc) . ... Fig.2: XSPEC data, model and residual plot . ...

... fit_opt] [mean_opt] . This command determines the characteristics (position, width, height) of each selected stellar object through a non--linear best fit to the data. ... Besides the best fit, FIT/ROMAFOT also computes the quality of the fit by the test and the semi--interquartile interval for each individual object. ... This happens when the command is requested to fit a window with several objects and when one or more of these falls into the category ``NO CONVERGENCY''. ...

... Generalized maximum entropy method and its application to antenna pattern reconstruction. In this paper the Generalized maximum entropy method and its application to the reconstruction of two-dimensional complex functions (namely, far-field antenna pattern distribution) from nonuniformly distributed samples are considered. ... It is shown that the Generalized maximum entropy method is sufficiently stable in the presence of errors. ...

... Problem 5. ... See figure 1 for the light curve of these narrow Nitrogen lines. ... Figure out the behaviour of each parcel of gas, and then add them all up to find the light curve. 5.4 (3pts) Using expression from problem 5.2, derive the expression for the time after SN explosion date, when the first light from the ionised ring reaches Earth. Using the expression from problem 5.2, derive the expression for the time after SN explosion date when the maximum brightness of the ring occurs. ...

L-Narrow Cal Values . On 18 December, 2000, the L-Narrow cals were re-measured, with the results shown below. Prior to 18 December, '00, the L-narrow Cal values were assumed to be 1.85 1.91 for A B polarizations, respectively, at all frequencies. This means that gain curves obtained before 18 Dec '00 assume old cal values, and curves determined after 18 Dec '00 assume new cal values. ... lbn cal values measured 18dec00 . ... calval polA [K] . calval polB [K] . ... 1.81 . ...

By using the tools of sections (20) and (21), the mathematics of approximate solutions developed in (M-5), and assuming all orbits are circles, it is a relatively straightforward job to calculate the distance to the Lagrangian L1 point (or to L2). ... Let the gravitational constant be denoted by G , the mass of the Sun by M , that of Earth by m , the Earth's distance from the Sun by r and its velocity in its orbit by v . ... GMm / r 2 = mv 2 / r . and multiplying both sides by r / m . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Science Fiction . ... The New Horizons science team€а is inviting everyone worldwide to vote for the names that will be given to the most prominent features on Pluto and Charon, Pluto?s largest moon. The pre-listed names are€а an eclectic mix from mythology and the literature and history of exploration. You can even nominate names to be added to the list. ... Yuggoth (H. P. LovecraftтАЩs name for Pluto) . ... Name * . ...

... Read in a hires optical spectrum and mask out lines to be ignored ! ... a) just calculate a spectrum with fixed abundances ! ... c) Solve for all light elements abundances { 1 8.53 0.0 2 11.54 0.0 5 0.10 0.0 6 8.00 1.0 7 7.81 1.0 8 7.10 1.0 12 7.01 1.0 13 5.73 1.0 14 6.94 1.0 15 5.50 1.0 16 6.75 1.0 18 6.10 1.0 20 5.10 1.0 21 1.70 0.0 22 3.84 0.0 23 2.82 0.0 24 4.06 0.0 25 3.71 0.0 26 6.18 0.0 27 4.26 0.0 28 5.05 0.0 29 3.20 0.0 30 4.34 0.0 39 1.42 0.0 40 2.40 0.0 -1 0 0 } synth save end ...

... By using the tools of sections (20) and (21), the mathematics of approximate solutions developed in (M-5), and assuming all orbits are circles, it is a relatively straightforward job to calculate the distance to the Lagrangian L1 point (or to L2). ... Let the gravitational constant be denoted by G , the mass of the Sun by M , that of Earth by m , the Earth's distance from the Sun by r and its velocity in its orbit by v . ... GMm / r 2 = mv 2 / r . and multiplying both sides by r / m . ...

... Find here a description of how to setup a new operational dfos installation. ... Therefore, we focus on the aspect of how to adapt the .dfosrc file and assume that anything else is then simply copied from the old ("reference") site to the new installation. ... dfos . ... click on 'download dfosExplorer' ; click on 'Save link target as' ; download dfosLog.tar into your $DFO_INSTALL_DIR; untar it (tar -xvf dfosExplorer.tar). click on 'description: dfosExplorer' and read the documentation . ...

Azimuth Drive Box Replacement . ... A. Start with drive box with soft spring preload Drive #2 . ... Loosen horizontal foot . ... Loosen horizontal foot the remaining amount , push preload foot in to ring and work drive box away from disc. Once clear of disc raise hoist and remove drive box . ... Lift new box in place - do not contact drive disc with box . ... Connect tangential link and set alignment using drive box to disc clearance and foot centering as metrics . ... Repeat for each box. ...