The results of a search for ultrarapid variability of galactic water maser sources at the wavelength 1.35 cm on a timescale of several minutes to 1 h are reported. A special observational technique was developed. ... Among those, several sources that have shown such variability were found. ... Clear evidence for such a variability type was found in at least two sources: W49N and W33B. Variability of this kind displays itself only in certain states of the water masers. ...

... Average effective wavelengths and band widths for various sp ectra Lyrae spectrum f flat k е 1014 Hz 5386 ± 18 4.66 ± 0.04 5714 ± 12 4.1 6234.5 ± 0.5 1.03 5372 ± 18 4.69 ± 0.04 eff 2 Optical Filter ID 1 2 3 4 a Fo c -6 10 erg/cm2 s 12.55 ± 0.10 11.04 ± 0.01 2.77 ± 0.004 12.63 ± 0.10 fo d 6 10 photons/cm2 s 3.40 ± 0.02 3.18 ± 0.004 0.87 ± 0.002 3.42 ± 0.02 Power-law eff f 2 е 5746 ± 317 6197 ± 253 6305 ± 31 5736 ± 316 spectra pl k 1014 Hz 3.70 ± 0.26 3.14 ± 0.16 0.88 ± 0.01 3.70 ± 0.27 Table 1. ...

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... 000, 1­12 (2009) Printed 11 February 2010 A (MN L TEX style file v2.2) Analytical approximations of K -corrections in optical and near-infrared bands I1gor V. Chilingarian1 2 ,2,3 , Anne-Laure Melchior 1,4 and Ivan Yu. ... Received 2010 February 01; in original form 2009 August 14 ABSTRACT To compare photometric properties of galaxies at different redshifts, the fluxes need to be corrected for the changes of effective rest-frame wavelengths of filter bandpasses, called K -corrections. ... Table 1. ...

Mark your calendars to reserve Tuesday, December 13 for a sensational astronomy meeting! The Amateur Astronomers Association of Princeton is presenting astronomer and author Kim Weaver for a presentation titled: "New Eyes on the Universe: Observing Beyond Hubble with the Chandra and Spitzer Space Telescopes," and will highlight violent processes and dust-enshrouded objects revealed only by searching for signatures in x-ray and infrared light. ...

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... Data from the early universe could further constrain Omega, the cosmological parameter defining the curvature of space. ... November November Earth, 1:25 November November 2 November November November November November November November November November November Earth, 1:56 7 Moon lies near Mars in evening twilight. ... The presence of water ice in the regolith was confir med. ... One of these small bodies could be maneuver ed into Mars-stationary orbit and used to anchor a Mars space elevator. ...

2 June 2006 2007-2009 Work Plan v1 2007-2009 WORK PLAN: TOWARD CONVERGENCE DRAFT 1 for Technical Review COVER NOTE The following is the first version for a three-year plan for GEO, 2007 to 2009. ... Page 1 of 38 2 June 2006 2007-2009 Work Plan v1 ACRONYMS ADM AMDAR AMMA APAN AVHRR CBD CEOS CERN DAPHNE DEM EC EPA EPIDEMIO FAPAR FDSN GEAN