Simultaneous optical and X-ray observations of flares and rotational modulation on the RS CVn binary HR 1099 (V711 Tau) from the MUSICOS 1998 campaign

We present simultaneous and continuous observations of the Hα, Hβ, He I D_3, Na I D_1,D_2 doublet and the Ca II H&K lines for the RS CVn system HR 1099. The spectroscopic observations were obtained during the MUSICOS 1998 campaign involving several observatories and instruments, both echelle and long-slit spectrographs. During this campaign, HR 1099 was observed almost continuously for more than 8 orbits of 2^d.8. Two large optical flares were observed, both showing an increase in the emission of Hα, Ca II H K, Hβ and He I D_3 and a strong filling-in of the Na I D_1, D_2 doublet. Contemporary photometric observations were carried out with the robotic telescopes APT-80 of Catania and Phoenix-25 of Fairborn Observatories. Maps of the distribution of the spotted regions on the photosphere of the binary components were derived using the Maximum Entropy and Tikhonov photometric regularization criteria. Rotational modulation was observed in Hα and He I D_3 in anti-correlation with the photometric light curves. Both flares occurred at the same binary phase (0.85), suggesting that these events took place in the same active region. Simultaneous X-ray observations, performed by ASM on board RXTE, show several flare-like events, some of which correlate well with the observed optical flares. Rotational modulation in the X-ray light curve has been detected with minimum flux when the less active G5 V star was in front. A possible periodicity in the X-ray flare-like events was also found.

Letters from William Tudor to his father, William Tudor, approximately

Two letters in which Tudor carefully debates the merits of careers in law versus mercantilism, and discusses the business prospects of several young merchants, a journey Tudor took with his brother, Frederic, throughout New England, and the state of politics, including the election to Congress of James Otis, and Thomas Jefferson’s prospects for the presidency.

Deeds for properties in Boston [and Cambridge?], 1798-approximately 1945 (inclusive); approximately 1880-1920 (bulk)

This group of records contains deeds and related documents for a selection of properties owned by Harvard University in Boston and possibly Cambridge and other nearby communities through the mid 1940s. Documents include deeds, assignments of mortgages, receipts, correspondence, and other legal documents. Many of the documents record property transfers prior to Harvard's acquisition of the property, and often the documents do not fully identify Harvard's involvement with the property. The bulk of the documents date from the late 19th and early 20th centuries.