... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

Top] [Prev] [Next] . In order to discover and determine some characteristics of extra-solar earth-like planets, J. R. P. Angel has defined several spacecraft experiments (labelled Oases 1 and 2). We have examined some aspects of these experiments and believe at least one, and possibly two, significant improvements could be made economically. The paper briefly discusses several features of redundant coronagraphs, and indicates one way that they might be incorporated into flight apparatus. ...

Next: The Orion OB1 Up: Contents Previous: This work . In this chapter, I will define the sample of stars which will be discussed throughout the remainder of the dissertation. I define two coeval sets of PMS stars located in the Orion OB1 association. ... I then describe the X--ray observations which were used to find the PMS stars in this association. After this, I spend several sections detailing the photometric observations and difficulties in placing objects on the H--R diagram. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . Here you can find freeware programs that help you calculate lunar occultations. Their main program is called "Lunar Occultation Workbench." ... Web Site . ... Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

. Gravitational Lensing and Dark Matter . Gravitational lensing by objects having intermediate massises is discussed in: . Yu.Baryshev, Yu.Ezova, "Gravitational Mesolensing by King Objects and Quasar-Galaxy Associations" Astronomy Reports, Vol. 41, No 4, 1997, pp. 436 - 446. Catalog of associations of Quasars and Galaxies see QSO_Gal.txt and file with description QSO_Gal_readme.txt

... Fortran . Storage rules Dummy argument is a quantity in the specification of a procedure, function or subroutine. Actual argument is a quantity in the call of a procedure, function or subroutine. ... Becomes 101 END PROGRAM EXAMPLE SUBROUTINE SUB(X, Y, Z) IMPLICIT NONE REAL, INTENT(IN) :: X REAL, INTENT(INOUT) :: Y REAL, INTENT(OUT) :: Z Y = Y**2 Z = X + Y END SUBROUTINE SUB In Fortran there is really only one kind of argument usage, called argument association. ...

spaceweb@oulu.fi - last update: 25 November 1998, 1130 UT (RR) . During increased geomagnetic activity , the quiet auroral arcs become more active, producing forms like spirals, curls and folds (e.g., Hallinan and Davis, 1970; Davis and Hallinan, 1976). Localized upward field-aligned currents (Rostoker, 1987; Bythrow and Potemra, 1987) are associated with these structures. ... 92 , 8691-8699, 1987. ... Hallinan, T. J., and T. N. Davis, Small-scale auroral arc distortions, Planet. ... 1987. ...

... In collaboration with Drs Van Genderen (Leiden, Holland) and Sterken (Brussels, Belgium) papers XV and XVI in the series `Light Variations of Massive Stars' were published. These dealt with the brightness variations of several massive stars in the two nearest neighbour galaxies, namely six stars (R85, R99, R103, R110, R123 and R128) in the Large Magellanic Cloud (LMC) and two (R42 and R45) in the Small Magellanic Cloud (SMC). ...

... The cross entropy for this complex image is given by ( 16 ) and ( 17 ). ... Differentiating ( 31 ) with respect to and , we find the gradient of is given by . and upon differentiating once more we find the Hessian (curvature) matrix of has the form . ... and its Hessian matrix reads . ... From ( 16 ) and ( 17 ), we find the components of the gradient vector of the cross entropy are given by . ... Differentiating once more we find the components of the Hessian of the cross entropy to be given by . ...

... Astronomical image processing applies a large variety of numerical methods to extract scientific results from observed data. The standard computational techniques used in this process are discussed with special emphasis on the problems and advantages associated with them when applied to astronomical data. ... In Section the transformation of raw observed data into intensity calibrated values is discussed while general image processing techniques are reviewed in Section . ... Basic Concepts . ...

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

... An Association Block (AB) contains for a set of raw frames all information about associated other files. ... associated calibration products . It also hosts information about pipeline reduction (recipe name, parameters for execution). ... set of specific keys (name=value) used to group the raw input files . ... column 5: associated AB of that product (pointing to the associated calib raw files) . ... further associated information: . ... name(s) of associated further information (e.g. QC1 plots) . ...