Considerable effort has gone into the modeling of the HST point spread function (PSF), both in order to measure the optical aberrations in support of the WFPC2, COSTAR, and advanced scientific instruments, and to provide PSFs for image deconvolution in the aberrated telescope. ... As a consequence of the under-sampling in the WFPC2, the limiting magnitude attainable in the background limit varies by about 0.5 magnitude, depending on the position of the source within the CCD pixel. ... 0.9 . ...

... Next: Cheating Poisson: A Up: Statistical Analysis Previous: Spatial Models and . ... The spatial distribution of stars in the Local Group dwarf irregular galaxy NGC 6822 has been studied, using recent positions and deep photometry for about 15,000 stars in the galaxy. Based on photometrical data, OB stars and red stars could be studied separately. Spatial statistical tools have been applied to the analysis of the spatial structure. ... Figure: Model selection by the aid of CAIC . ...

... I would several points which we faced during our everysolved for better quality of individual ACs' and EOP products · There are two main EOP products provided by two IERS Product Centers on Earth Orientation (Earth Orientation Center (EOC) and Rapid Service/ Prediction Center (RSPC)). ... However, the latter is not provided by the IERS. ... ITRF · Using ITRF in computation of EOP series produced by various ACs seems to be a necessary condition to provide the consistency between the IERS products. ...

February 4, 2008 (Monday) Gabriella Sciolla, Massachusetts Institute of Technology . ... This detector, which will be operated underground in 2008-2009, will allow us to set limits on spin-dependent Dark Matter interactions using a directional detector. 4:00 pm, 472 Willamette Hall . ... return to top . ... This seminar will briefly review the role of axions in particle and astrophysics, and will describe the progress we have made in the experimental search. 4:00 pm, 472 Willamette Hall . ...

... The first EGRET catalog ([ Fichtel et al. 1994b ]) used the galactic diffuse gamma radiation model of Bertsch et al. (1993b). ... For the results presented by Bertsch et al. (1993b), the HI and W radio data were deconvolved by integrating the radio data over a velocity interval determined by the endpoints of each distance interval ( ). ... The Galactic radius limit used in the model has been increased to 30 kpc. ... The CR electron spectrum of Fichtel et al. (1991) was used by Bertsch et al. ...

... Archives . ... On the other hand, CHASC scientists relate more general and broad statistical inference problems in estimating the intensity map, like intensity uncertainties at each point and the scientifically informative display of the intensity map with uncertainty according to the Poisson count model and constraints from physics and the instrument, where the field, multiscale modeling is associated. As the post title [MADS] indicates, no abstract has keywords multiscale modeling. ...

... The plots show the pointing errors mar10-jun10(.ps) ( .pdf ) (24mar10 thru 03jun10 morning) . ... The rms errors are: za 9.73 asecs, az 10.38 asecs . ... The errors were fits to yfit=c0 + c1*cos(az) +c2*sin(az)+c3*cos(2az)+c4*sin(2az)+c5*cos(3az)+c6*sin(3az) . ... Model Term . ... Page 2: the pointing errors with the za sin(3az) error included . ... the 4.82 za error is from the large 3az term from the incorrect model parameter . Page 3: the pointing errors with the correct za sin(3az) model term. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

SXG Data Center . ... SXG instruments models . Data archive . ... SXG Scientific Data Output Modelling . The task of SPECTRUM-XG Scientific Data Output Modelling is multifold: Utilization of experiment data output computer simulations in pre-flight calibration of mission instruments. ... Utilization of computer simulations in the data analysis software development. The prototype of SXG X-model project is being realized at IKI. ...

... We now describe the input parameters to the self-calibration tasks. ... For selfcal , you need not perform source , dra , or ddec selection if you use the selradec option (see below). minants : The minimum number of antenna that must be present before the tasks will attempt to find a solution. ... and phase : This determines whether the self-calibration tasks solve for just phase ( options=phase , which is the default) or amplitude and phase solution ( options=amplitude ). mfs : . ...

... The axial support is provided by 78 air pistons. ... The transverse support is provided by 38 air pistons, supported by cantilevers from the mirror cell, that act on the mirror local center of gravity surface. ... The locations where the transverse mirror support forces should be applied to the mirror are listed in Table 1 and illustrated in Figure 1. ... Figure 1: CAD drawing showing the 2.5-m primary mirror and the locations of the transverse support posts (black) and axial pneumatic pistons (blue...

SAVE_PHOTO_WHEN_TERMINATE=T, CREATE_PRE_MAIN_SEQUENCE_MODEL=T, PRE_MS_RELAX_NUM_STEPS= 200, LOAD_SAVED_MODEL=F, SAVED_MODEL_NAME=' undefined ', CREATE_INITIAL_MODEL=F, INITIAL_MODEL_RELAX_NUM_STEPS= 10, INITIAL_MODEL_EPS= 5.0000000745058060E-002, RADIUS_IN_CM_FOR_CREATE_INITIAL_MODEL= 0.0000000000000000 , MASS_IN_GM_FOR_CREATE_INITIAL_MODEL= 0.0000000000000000 , STEPS_TO_TAKE_BEFORE_TERMINATE= -1, STOP_IF_THIS_FILE_EXISTS=' ', SET_INITIAL_AGE=F, INITIAL_AGE= ...

Next: The Model Up: No Title Previous: Radiopulsars as Sources of . In this section, we study the evolution of stellar populations on a time-scale of 10 Myr for a starburst љ occurring under conditions similar to those in the Galactic Center (see Lipunov et al. (1995d)[ 126 ]). We estimate the expected number of X-ray transient љ sources (NS + MS star), super accreting BH, and BH + supergiant binaries, all as functions of time elapsed after the burst. ...

Blackholes Forum Message . ... Quicksand As Black Hole Model? ... For the hole to be black it must have a fuzzy edge i.e. something one is sinking into (like a black hole is like quicksand that you discover by sinking partly into it?) ... A number of oranges "probes" what it is to be an orange so "black hole" = "number" you might suppose. ... The rest of their body not in the quicksand (i.e. not in the black hole) equates to the "collection of anti-matter near the blackhole"? ... www.astronomy.net . ...

. Produced by the Sloan Digital Sky Survey, this 3-D map of the distribution of galaxies shows Earth at the center, and represents each galaxy with a single point . Large astronomical surveys, such as SDSS, rely upon a model of Baryon Acoustic Oscillations to provide a cosmological тАЬstandard rulerтАЭ for determining length scale. Ohio State UniversityтАЩs Chris Orban and David Weinberg have employed Ohio Supercomputer Center resources to simplify and better characterize that BAO model. M. Blanton and SDSS

... Fitting and Modeling of AXAF Data with the ASC Fitting Application S. Doe, M. Ljungberg, A. Siemiginowska and W. Joye AXAF Science Center, MS 81, Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 USA Abstract. ... Fitting and Modeling of AXAF Data 159 MODEL MANAGER FIT STATISTIC MANAGER MANAGER SRC BKGD INSTR MODEL = SRC + BKGD * INSTR MODELS MODELS MODELS MANAGER MANAGER STATS METHODS OPTIMIZATION METHOD MANAGER Figure 3. The Model, Method, and Statistic Managers. ...

The conference program included eleven one-hour talks and four free discussions. ... The talk also discussed different models for Internet traffic and quality of Service measures. ... The talk by Nikolai Vereschagin (Moscow State University) "The Kolmogorov complexity of approximate descriptions" discussed different notions of descriptive complexity of computable sequences which can be used in Internet measurements. ... What mathematics does Internet need?" ...

XMM ­Newton CCF Release Note XMM ­ CCF ­REL­2 Point Spread Function of the X­ray telescopes P. Gondoin October 4, 2000 1 CCF components Name of CCF VALDATE Blocks changed CAL VERSION XSCS flag XRT1 XPSF 0006 2000­01­13T00:00:00 ALIGNMENT, FIT PAR, 3GAUSS PAR, IMAGE sas 20000903 1900 NO XRT2 XPSF 0002 2000­01­13T00:00:00 ALIGNMENT, FIT PAR, 3GAUSS PAR, IMAGE sas 20000903 1900 NO XRT3 XPSF 0002 2000­01­13T00:00:00 ALIGNMENT, ... In­orbit calibration of the XMM­Newton telescopes. ...