... CV & PUBLICATIONS | ... Nicholls, DC, Dopita, MA, Sutherland, RS, Jerjen, H, & Kewley, LJ " Metal-poor Dwarf Galaxies in the SIGRID Galaxy Sample. ... Nicholls DC, Jerjen, H, Dopita MA, & Basurah, H. (2014) " Nebular Metallicities in Two Isolated Local Void Dwarf Galaxies ", Astrophysical Journal 780, 88 * . ... Sweet SM, Drinkwater MJ, Meurer G, Bekki K, Dopita MA, Kilborn V, & Nicholls DC, " CHOIRS H I Galaxy Groups: The Metallicity of Dwarf Galaxies" , (2014) Astrophysical Journal , 782, 35 * . ...

XMM-Newton SAS Scientific Validation and Data . ... the level of accuracy associated with those products The outcome of the SAS science validation for each test dataset is summarized in a report, available along with the dataset. ... The Scientific Validation Report v2.1(.ps.gz) is available for the SAS v6.5 Scientific Validation SAS v6.5 Scientific Validation Preliminary Report . The Preliminary Report (.ps.gz) is still available for SAS v6.5 Scientific Validation SAS v6.0 Scientific Validation . ...

... Seminar archive . ... 30 min. ... Липунов В. М. ( МГУ, ГАИШ МГУ ) . ... Горбовской Е. С. ( ГАИШ МГУ, от группы МАСТЕР ) . Тюрина Н. В. ( ГАИШ МГУ ) . ... Руденко В. Н. ( ГАИШ МГУ ) . ... Пустовойт В. И. Download presentation . Липунов В. М. Download presentation . ... А.В.Тутуков(ИНАСАН), Л.Р.Юнгельсон, А.М.Черепащук (ГАИШ МГУ), Н.С.Кардашев, И.Д.Новиков, В.Н.Лукаш, А.Г.Дорошкевич (АКЦ ФИАН), А.Ф.Захаров (ИТФ), Г.С.Бисноватый-Коган (ИКИ), М.Е.Прохоров, К.А.Постнов (ГАИШ МГУ) , . ...

... Astronomical Institute "Anton Pannekoek", Amsterdam of Univeristy, Amsterdam, Netherlands . ... Astronomical Institute, St.Petersburg University, St.Petersburg, Russia . ... Technical report on computer codes for Separation of variables and T-matrix methods (LaTeX file) . Technical report on WWW database of optical constants (LaTeX file) . Technical report on calculation of spheroidal wavefunctions and the eigenvalues (LaTeX file) . Annual report (1998) (LaTeX file) . ...

http ://www.cbat.eps.harvard.edu/iau/cbet/003900/CBET003962.txt Electronic Telegram No.3962 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University ; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau en eps.harvard.edu (alternate cbat en iau.org) URL http ://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA ...

... Chandra Survey . ... Optical Database . ... The R (1200 sec total exposure time), I (540 sec), and Halpha (4500 sec) images show a source at RA(J2000)=17h 49m 55.34s, Dec(J2000)=-29d 19m 19.7s. At an offset of 0.16", this is consistent with the Chandra position. ... Given the error on the Faulkes position (0.3"), and the absence of other sources in the Mosaic and Faulkes images within 1.8" of the Chandra position, we consider our Mosaic source and the proposed optical counterpart to be the same. ...

The weather throughout this year was so extremely favorable that I have been able to observe the Sun clearly on 312 days; however, I counted only 34 groups of sunspots.. From my earlier observations, which I have reported every year in this journal, it appears that there is a certain periodicity in the appearance of sunspots and this theory seems more and more probable from the results of this year.. ... 244 . ... 149 . ... Exploration" home page (index) Glossary . Official GSFC Home Page .. ...

RELATIVE SUNSPOT NUMBERS Description of Data from SGD Explanation of Data Reports: Relative Sunspot Numbers -- The relative sunspot number is an index of the activity of the entire visible disk of the Sun. ... The provisional daily Zurich relative sunspot numbers, Rz, were based upon observations made at Zurich and its two branch stations in Arosa and Locarno and communicated by M. Waldmeier of the Swiss Federal Observatory. ... This indicates the uncertainty above and below the predicted number. ...

MAIN PAGE . ... Nova Cygni August 1975! ... 1975/76: Comet West! ... Dr. Richard West (4th from left) & AAL members visiting SES Betzdorf on occasion of our club's 25th anniversary - October 1996 . Comet West Information . ... It was the brightest comet visible from Earth since Comet West in 1976. ... 1997: Comet Hale-Bopp! ... Thus Comet Hale-Bopp never got closer to Earth than Earth gets to the Sun. ... Comet Hale-Bopp JPL Page . ... 1999: Total solar eclipse over Luxembourg! ...

... One striking feature is a small source of almost pure H 2 line emission, which is located near one of the compact sources in Orion reported by O'Dell and collaborators (HST-18 = 203-504). ... H-H objects, Proplyds, Orion Bar, H 2 . ... We obtained a series of images across the bright rim of the Orion Bar near the peaks of mm-wave molecular line emission with NICMOS cameras 1-3 (NIC1, NIC2, NIC3) in several filters on 1998 February 18. ... The suggestion of an H-H object does not seem compelling. ...

... 9) Oknyanskij V.L. 1994, "Optical-radio time delays in Q0957+561", Odessa Astronomical Publ., ... 11) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", in Proceedings of Int. Conf. ... 1994. 12) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NG