955 resultados para Sloper, William, fl. 1740.


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Each vol. has added engraved t.p. with vignette.

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Mode of access: Internet.

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Mode of access: Internet.

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With reproduction of original t.p., dated 1600.

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Mode of access: Internet.

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Observations of the Galactic center region black hole candidate 1E 1740.7-2942 have been carried out using the Caltech Gamma-Ray Imaging Payload (GRIP), the Röntgensatellit (ROSAT) and the Very Large Array (VLA). These multiwavelength observations have helped to establish the association between a bright emitter of hard X-rays and soft γ-rays, the compact core of a double radio jet source, and the X-ray source, 1E 1740.7-2942. They have also provided information on the X-ray and hard X-ray spectrum.

The Galactic center region was observed by GRIP during balloon flights from Alice Springs, NT, Australia on 1988 April 12 and 1989 April 3. These observations revealed that 1E 1740.7-2942 was the strongest source of hard X-rays within ~10° of the Galactic center. The source spectrum from each flight is well fit by a single power law in the energy range 35-200 keV. The best-fit photon indices and 100 keV normalizations are: γ = (2.05 ± 0.15) and K_(100) = (8.5 ± 0.5) x 10^(-5) cm^(-2) s^(-1) keV^(-1) and γ = (2.2 ± 0.3) and K_(100) = (7.0 ± 0.7) x 10^(-5) cm^(-2) s^(-1) keV^(-1) for the 1988 and 1989 observations respectively. No flux above 200 keV was detected during either observation. These values are consistent with a constant spectrum and indicate that 1E 1740.7-2942 was in its normal hard X-ray emission state. A search on one hour time scales showed no evidence for variability.

The ROSAT HRI observed 1E 1740.7-2942 during the period 1991 March 20-24. An improved source location has been derived from this observation. The best fit coordinates (J2000) are: Right Ascension = 17^h43^m54^s.9, Declination = -29°44'45".3, with a 90% confidence error circle of radius 8".5. The PSPC observation was split between periods from 1992 September 28- October 4 and 1993 March 23-28. A thermal bremsstrahlung model fit to the data yields a column density of N_H = 1.12^(+1.51)_(0.18) x cm^(-2) , consistent with earlier X- ray measurements.

We observed the region of the Einstein IPC error circle for 1E 1740.7-2942 with the VLA at 1.5 and 4.9 GHz on 1989 March 2. The 4.9 GHz observation revealed two sources. Source 'A', which is the core of a double aligned radio jet source (Mirabel et al. 1992), lies within our ROSAT error circle, further strengthening its identification with 1E 1740.7-2942.

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Contains an itemized list of costs for painting and glazing tasks to be completed and supplies needed by Watson for Holden Chapel. Tasks include painting Doctor Warren's room twice, painting window sashes and shutters, transporting glass from Boston, and setting each window pane. Supplies needed include oil, white lead, and putty.

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President Edward Holyoke and Tutors Henry Flynt, Joseph Mayhew, and Thomas Marsh accused Prince of "sundry crimes & misdemeanors" and "sundry evil actions," including weakening and undermining the College government, showing contempt towards his fellow Tutors and towards Hollis Professor John Winthrop (who he claimed "knew no more of Philosophy than a Brute"), and making insulting remarks on numerous occasions. Prince was accused of calling others "Fool, Rogue, Rascal, Puppy &c." and of calling Col. Brattle "a Devilish Lyar." He was also accused of "appearing often times, to be what is commonly stil'd the worse for Drink" and of neglecting his duties towards his students.