Astronomy Letters -- August 2004 Volume 30, Issue 8, pp. 509-581 Hydrogen Absorption Lines in the Cosmic Microwave Background Spectrum V. K. Dubrovich and N. N. Shakhvorostova pp. 509-513 Full Text: PDF (154 kB) Galactic Bars and Spirals as Slow Modes of Stellar Disks E. V. Polyachenko pp. 514-518 Full Text: PDF (160 kB) UGC 5119: A Galaxy with a Stellar Polar Ring? V. A. Yakovleva and G. M. Karataeva pp. 519-526 Full Text: PDF (3375 kB) A Hard X-ray Sky Survey with the SIGMA Telescope of the GRANAT Observatory M. G. Revnivtsev, R. A. Sunyaev, M. R. Gilfanov, E. M. Churazov, A. Goldwurm, J. Paul, P. Mandrou, and J. P. Roques pp. 527-533 Full Text: PDF (386 kB) A Hard X-ray Survey of the Sagittarius Arm Tangent with the IBIS Telescope of the INTEGRAL Observatory: A Catalog of Sources S. V. Molkov, A. M. Cherepashchuk, A. A. Lutovinov, M. G. Revnivtsev, K. A. Postnov, and R. A. Sunyaev pp. 534-539 Full Text: PDF (628 kB) Observations of the X-ray Pulsar GX 301-2 with the ART-P Telescope of the Granat Observatory S. S. Tsygankov, A. A. Lutovinov, S. A. Grebenev, M. R. Gilfanov, and R. A. Sunyaev pp. 540-548 Full Text: PDF (269 kB) JHKLM Photometry for Carbon Stars O. G. Taranova and V. I. Shenavrin pp. 549-565 Full Text: PDF (393 kB) Influence of Uncertainties in the Rate Constants of Chemical Reactions on Astrochemical Modeling Results A. I. Vasyunin, A. M. Sobolev, D. S. Wiebe, and D. A. Semenov pp. 566-576 Full Text: PDF (270 kB) On the Variations in the Parameters of High-Degree Acoustic Modes with Solar Cycle Sh. S. Kholikov, O. S. Burtseva, A. V. Serebryanskiy, and Sh. A. Ehgamberdiev pp. 577-581 Full Text: PDF (342 kB)