3,907 research outputs found
A dust-parallax distance of 19 megaparsecs to the supermassive black hole in NGC 4151
No full textThe active galaxy NGC 4151 has a crucial role as one of only two active galactic nuclei for which black hole mass measurements based on emission line reverberation mapping can be calibrated against other dynamical techniques1, 2, 3. Unfortunately, effective calibration requires accurate knowledge of the distance to NGC 4151, which is not at present available4. Recently reported distances range from 4 to 29 megaparsecs5, 6, 7. Strong peculiar motions make a redshift-based distance very uncertain, and the geometry of the galaxy and its nucleus prohibit accurate measurements using other techniques. Here we report a dust-parallax distance to NGC 4151 of megaparsecs. The measurement is based on an adaptation of a geometric method that uses the emission line regions of active galaxies8. Because these regions are too small to be imaged with present technology, we use instead the ratio of the physical and angular sizes of the more extended hot-dust emission9 as determined from time delays10 and infrared interferometry11, 12, 13, 14. This distance leads to an approximately 1.4-fold increase in the dynamical black hole mass, implying a corresponding correction to emission line reverberation masses of black holes if they are calibrated against the two objects with additional dynamical masses
Nancy Dingham Watson Correspondence
No full textEntries include a typed letter of correspondence from children\u27s author Nancy Dingham Watson on Aldren A. Watson, Illustration & Design, Putney, Vermont, stationery with a red-inked print image of a train, in reply to the Maine State Library concerning her recent book When is Tomorrow? dedicated to her father and illustrated by her husband, and visits to Vinalhaven, Maine, prompted (in part) by a seasonal allergy to ragweed, with typed correspondence from Aldren Watson discussing his father-in-law\u27s delight on reading the book, a typographical error, notice of new farm book What Does A Begin With?, and a typed letter from the Maine State Library on receipt of her book gift for the Maine Author Collection
2004-2005 Brad Watson
No full textBrad Watson is the author of two collections of stories and two novels, The Heaven of Mercury, which was a finalist for the 2002 National Book Award, and Miss Jane, longlisted for the 2016 National Book Award. His fiction has been published in The New Yorker, Granta, Ecotone, Electric Literature, and the Idaho Review, among other publications. He teaches at the University of Wyoming, Laramie.https://egrove.olemiss.edu/grisham_res/1015/thumbnail.jp
Reflections on the Life and Times of Alan Watson
No full textThe author summarizes the career of Alan Watson, J.D. and University of Georgia Law School faculty member
Land lease statement from Watson Land Company to Torakichi Isono, July 1, 1938
No full textStatement reflects payment due for second half of the year 1938 in the amount of $275. The statement is generated by the Watson Land Company, however, the lease is originated from the Dominguez Estate Company
Watson-Russell Children - 02
No full textPhotograph - Five of the six children of Thomas Watson and Cassie Russell, Athabasca, Alberta. Left to right: William S. Watson, T. Russell Watson, Cecilia B. Watson, H. Bertram Watson, and Helen E. Watso
Watson-Russell Children
No full textPhotograph - Five of the six children of Thomas Watson and Cassie Russell, Athabasca, Alberta. Left to right: William S. Watson, T. Russell Watson, Cecilia B. Watson, Helen E. Watson, and H. Bertram Watso
Dr. Robert Watson Presents His Latest Novel, “When Washington Burned”
No full textDr. Robert Watson presents his latest novel, When Washington Burned, at the Mandel JCC Boynton Beach on Aug. 28, 2024, with a discussion of current events and author book signing to follow
Ford Evening Book Talk: Robert P. Watson
No full textMount Vernon welcomes author Robert P. Watson to the Robert H. and Clarice Smith Auditorium to discuss his book The Ghost Ship of Brooklyn: An Untold Story of the American Revolution on Thursday, December 6, 2018. Presented as part of the Ford Evening Book Talks in the Robert H. and Clarice Smith Auditorium, George Washington\u27s Mount Vernon, Mount Vernon, Virginia
Watson Family
No full textPhotograph - A group of people sitting on the steps of a house, Athabasca, Alberta. Adults, left to right: Thomas Watson, Cecilia Barbara Wright (Watson), Bessie Finlayson (Bell), and Agnes Bell (sister of Thomas Watson). The Wright children, clockwise from top: George, Robin, Charles and Mari
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