We obtained K-band (2.0--2.5 mu m) infrared spectra of the visually obscured superluminal source GRS 1915+105 at three different epochs of 1995, at times when it was detected as a hard X-ray source. The three spectra exhibit H I Br gamma (2.167 mu m) and He I (2.058 mu m) emission lines. The spectral morphology, absolute magnitude, and time

Light curves of the very low-mass member of the alpha Persei open cluster, AP J0323+4853, obtained during two different observing runs in 1994 and 1995, display a starspot rotational modulation of period ~7.6h. With a most likely mass of 0.09 Msolar, close to the substellar limit, AP J0323+4853 is the lowest mass star so far for which a photometric

The symbiotic nova RR Telescopii has been observed with the 1.5 m telescope of the Cerro Tololo Inter-American Observatory (CTIO), using the 1.5 m bench-mounted echelle spectrograph in conjunction with a Tektronix CCD. It displays a rich emission-line spectrum, ranging in excitation from O I to [Ni VIII]. We present a list of 491 measured lines

We report intermediate resolution H alpha spectroscopy of the black hole candidate Nova Muscae 1991 during quiescence. We classify the companion star as a K3-K4V which contributes 85 plusmn 6 percent to the total flux from the binary. The photospheric absorption lines are broadened by 106 plusmn 13 km s^-1 with respect to template field stars

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This paper discusses the Galactic plane as a case history of the application of different kinds of data bases to the problem of the large-scale Galactic structure. The shape of the Galaxy, and tilts and warps in the Galactic plane are examined.