47 citations · 47 across the 3 of their papers we have counts for
6 papers
PHL 1811: The Local Prototype of the Lineless High-z SDSS QSOs
Karen M. Leighly, Jules P. Halpern, Edward B. Jenkins
Abridged) In the SDSS, several unusual QSOs have been discovered that have very blue rest-frame UV spectra but no discernible emission lines. Their UV spectra strongly resemble tha…
Long Term Profile Variability of Double-Peaked Emission Lines in AGNs
Karen T. Lewis, Michael Eracleous, Jules P. Halpern +1
An increasing number of AGNs exhibit broad, double-peaked Balmer emission lines, which are thought to arise from the outer regions of the accretion disk which fuels the AGN. The li…
Multiwavelength Searches of Unidentified EGRET Sources
N. Mirabal, J. Halpern, R. Mukherjee +2
3EG J1835+5918 is the brightest of the so-called unidentified EGRET sources at intermediate galactic latitude (l,b)=(89,25). We obtained complete radio, optical, and X-ray coverage…
The afterglow and complex environment of the optically dim burst GRB 980613
Jens Hjorth, Bjarne Thomsen, Svend R. Nielsen +15
We report the identification of the optical afterglow of GRB 980613 in R- and I-band images obtained between 16 and 48 hours after the gamma-ray burst. Early near-infrared (NIR) H…
The New Gamma-ray Pulsar PSR J2229+6114, its Pulsar Wind Nebula, and Comparison with the Vela Pulsar
J. P. Halpern, E. V. Gotthelf, F. Camilo +2
With a period of 51.6 ms and spin-down power 2.2x10^{37} erg s^{-1}, PSR J2229+6114 is a compelling identification for the EGRET source 3EG J2227+6122 in which error circle it resi…
The transient X-ray source SAX J2239.3+6116 and its optical counterpart
J. J. M. in 't Zand, J. Halpern, M. Eracleous +4
We have discovered with the Wide Field Cameras on board BeppoSAX the weak transient X-ray source SAXJ2239.3+6116 whose position coincides with that of 4U2238+60/3A2237+608 and is c…