Baan, W.A.,, Salzer, J.J. and LeWinter, R.D., Optical Classification of Megamaser Galaxies , Astrophys. J., 509, 633, 1998. Balick, B., Hajian, A. R., Terzian, Y., Perinotto, M., and Patriarchi, P., FLIERs and other Microstructures in Planetary Nebulae IV: Images from the Hubble Space Telescope , Astron.J., 116, 360, July, 1998. ... 104 E, 1897, 1999. ... Kukula, M.J., Ghosh, T., Pedlar, A. and Schilizzi, R.T., "Parsec-Scale Radio Structures in the Nuclei of Four Seyfert Galaxies , Astrophys. ...

Next: Data analysis and Spatial Up: Spatial Corrections of ROSAT Previous: Spatial Corrections of ROSAT . ... We start with an observation for which the PRF is much worse than it should be; caused by residual wobble errors or other causes. ... Spatial analysis of ROSAT HRI observations are often plagued by poor aspect solutions, precluding the attainment of the potential resolution of about 5''. ... A recent example showed one obi for which the source was 10 north of its position in the other 17 obis. ...

XMM-Newton Science Analysis System . ... Technical Report XMM-PS-GM-20, ESA/SSD, Jan 14 2000. ... I.M. George K.A. Arnaud and A.F. Tennant. The OGIP Spectral File Format . Technical Report OGIP/92-007, NASA/GSFC, Sept 1992. ... The Calibration Requirements for Spectral Analysis. Technical Report OGIP/92-002, NASA/GSFC, Dec 1998. ... SSC. XMM Survey Science Centre to Science Operations ICD for SSC Products. Technical Report XMM-SOC-ICD-0006-SSC Issue 2.1, SSC, Mar 2000. ...

... We describe image compression based on the pyramidal median transform, introduced as an alternative to the use of a wavelet transform. The use of a multiresolution support allows ``protection'' of astronomical objects in the image. ... We describe an approach to astronomical image compression through noise removal. ... We begin by explaining why transforms other than the wavelet transform are important for astronomical image compression. ... Negative Values. ... The image dimensions were . ...

Next: The Formation and Evolution Up: NICMOS Science Previous: NICMOS Observes the Galactic . ... We have taken diffraction-limited ( 0.15") near-infrared F160W (henceforth H-band, for convenience) images with NICMOS on HST of the center of the R136 cluster (age 3.5 Myr) in the core of the 30 Dor giant HII region in the Large Magellanic Cloud. ... 1996, ApJ 466, 274) can sample only M >2M , while previous V and I band HST images with WFPC2 (Hunter et al. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Most of the Abstracts and Full Papers that appear here are in Postscript Format . ... 272 Randomly sampling the chromospheric peak power distribution J.G. Doyle, G.H.J. van den Oord and E. O'Shea . A 327, 365 (1997) . ... Full Paper . ... C.I. Short and J.G. Doyle . ... R. Erd lyi, I. Ballai and M. Goossens . ... R. Erd lyi and B. Pint r . ... J.G. Doyle, E. O'Shea, R. Erd lyi, K.P. Dere, D.G. Socker and F.P. Keenan . ...

... Publications . ... D. F. Buscher, M. Creech-Eakman, A. Farris, C. A. Haniff, and J. S. Young, The conceptual design of the magdalena ridge observatory interferometer, Journal of Astronomical Instrumentation , vol. 02, p. 1340001, Dec. ... DOI | ... Opt. , vol. 34, pp. ... N. D. Thureau, R. C. Boysen, D. F. Buscher, C. A. Haniff, E. Pedretti, P. J. Warner, and J. S. Young, Fringe envelope tracking at COAST, in Interferometry for Optical Astronomy II (W. A. Traub, ed.), vol. 4838 of procspie , pp. ...

lsst.coordConv љ unknown . ... Files . ... include . ... physConst.h . ... 17 љ const double Pi = std::atan(1.0)*4; . 18 љ const double HoursPerDeg = 24.0 / 360.0; // hours per degree . 19 љ const double RadPerDeg = Pi / 180.0; // radians per degree . 20 љ const double KmPerAU = 149597871.0; // kilometers per astr. unit (Astr. ... 38 љ // const double JY_per_BY = 36524.2198781 / 36525.0; // Julian years per Besselian (troPical) Years (Taff) . ... Definition: physConst.h:26 . ...