4 papers
Parallaxes of Brown Dwarfs at USNO
H. C. Harris, C. C. Dahn, F. J. Vrba +10
Trigonometric parallaxes have been measured by Dahn et al. (2002) for 28 cool dwarfs and brown dwarfs, including 17 L dwarfs and three T dwarfs. Broadband CCD and near-IR photometr…
The optical afterglow and host galaxy of GRB000926
J. U. Fynbo, J. Gorosabel, T. H. Dall +27
We present the discovery of the Optical Transient (OT) of the long-duration gamma-ray burst GRB000926. The optical transient was detected independently with the Nordic Optical Tele…
K band monitoring of GRS 1915+105 during 1999/2000
J. Greiner, F. J. Vrba, A. A. Henden +2
We report on long-term K band photometry of the galactic microquasar GRS 1915+105 since March 1999. We see variations of more than 1 mag, which are seemingly correlated with variat…
The optical/IR counterpart of the 3 July 1998 gamma-ray burst and its evolution
A. J. Castro-Tirado, M. R. Zapatero-Osorio, J. Gorosabel +21
We imaged the X-ray error box of GRB 980703, beginning 22.5 hours after the gamma--ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detect…