354 citations · 3.5k across the 72 of their papers we have counts for
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Time-series Spectroscopy and Photometry of the Pulsating Subdwarf B Star PG 1219+534 (KY UMa)
M. D. Reed, J. R. Eggen, S. L. Harms +7
We present observations and analysis of time-series spectroscopy and photometry of the pulsating subdwarf B star PG 1219+534 (KY UMa). Subdwarf B stars are blue horizontal branch s…
The Afterglows of Swift-era Gamma-Ray Bursts. I. Comparing pre-Swift and Swift era Long/Soft (Type II) GRB Optical Afterglows
D. A. Kann, S. Klose, B. Zhang +73
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for a total of 76…
Multiperiodicity in the newly discovered mid-late Be star V2104 Cygni
K. Uytterhoeven, E. Poretti, E. Rodriguez +5
We obtained the first long, homogenous time-series of V2104Cyg, consisting of 679 datapoints, with the uvbybeta photometers of Sierra Nevada and San Pedro Martir Observatories with…
On the H emission from the Cephei system
R. S. Schnerr, H. F. Henrichs, R. D. Oudmaijer +1
Be stars, which are characterised by intermittent emission in their hydrogen lines, are known to be fast rotators. This fast rotation is a requirement for the formation of a Kepler…
The orbit of the close spectroscopic binary epsilon Lupi and the intrinsic variability of its early B-type components
K. Uytterhoeven, P. Harmanec, J. H. Telting +1
We subjected 106 new high-resolution spectra of the double-lined spectroscopic close binary epsilon Lupi, obtained in a time-span of 17 days from two different observatories, to a…
Multi-Site observations of SU Aurigae
Y. C. Unruh, J. -F. Donati, J. M. Oliveira +20
We present results from the 1996 MUSICOS (MUlti-SIte COntinuous Spectroscopy) campaign on the T Tauri star SU Aurigae. We find a 2.7-d periodicity in the He I (587.6 nm) line and s…
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
D. Garcia-Alvarez, B. H. Foing, D. Montes +2
We present simultaneous and continuous observations of the H, H, He {\sc i} D, Na {\sc i} D,D doublet and the Ca {\sc ii} H & K lines for the RS CVn system…
The mass of the neutron star in Vela X-1
O. Barziv, L. Kaper, M. H. van Kerkwijk +2
We measured the radial-velocity curve of HD77581, the B-supergiant companion of the X-ray pulsar Vela X-1, using 183 high-resolution optical spectra obtained in a nine-month campai…
An Early-Time Infrared and Optical Study of the Type Ia Supernova 1998bu in M96
M. Hernandez, W. P. S. Meikle, A. Aparicio +22
We present first-season infrared (IR) and optical photometry and spectroscopy of the Type Ia Supernova 1998bu in M96. We also report optical polarimetry of this event. SN1998bu is…
Optical and Infrared photometry of the type IIn SN 1998S:Days 11-146
A. Fassia, W. P. S. Meikle, W. D. Vacca +1
We present contemporaneous optical and infrared photometric observations of the type IIn SN 1998S covering the period between 11 and 146 days after discovery. The infrared data con…
Spectral Energy Distributions and Light Curves of GRB 990123 and its Afterglow
T. J. Galama, M. S. Briggs, R. A. M. J. Wijers +38
Gamma-ray bursts (GRBs) are thought to result from the interaction of an extremely relativistic outflow interacting with a small amount of material surrounding the site of the expl…
Long- and short-term variability in O-star winds II. Quantitative analysis of DAC behaviour
L. Kaper, H. F. Henrichs, J. S. Nichols +1
A quantitative analysis of time series of ultraviolet spectra from a sample of 10 bright O-type stars (cf. Kaper et al. 1996, Paper I) is presented. The migrating discrete absorpti…
Optical follow-up of GRB 970508
T. J. Galama, P. J. Groot, J. van Paradijs +14
We report on the results of optical follow-up observations of the counterpart of GRB 970508, starting 7 hours after the event. Multi-color U, B, V, R and I band observa…