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Mass limits for the progenitor star of supernova 2001du and other Type II-P supernovae
Smartt, S. J.; Benetti, S.; Maund, J. R. +3 more
The supernova SN 2001du was discovered in the galaxy NGC 1365 at a distance of 19+/-2Mpc, and is a core-collapse event of Type II-P. Images of this galaxy, of moderate depth, have been taken with the Hubble Space Telescope approximately 6.6 yr before discovery and include the supernova position on the WFPC2 field of view. We have observed the supe…
Spectroscopic characteristics of polar plumes
Mason, H. E.; Del Zanna, G.; Bromage, B. J. I.
Extreme ultraviolet observations of plumes in polar coronal holes are presented and their spectroscopic signatures discussed. The study focuses on the base of plumes seen on the disk of the Sun with the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) satellite. Spectroscopic diagnostic techniques are applied …
The HELLAS2XMM survey. III. Multiwavelength observations of hard X-ray selected sources in the PKS 0312-77 field
Maiolino, R.; Perola, G. C.; Fiore, F. +11 more
We present extensive optical, radio and infrared follow-up observations of a sample of 35 hard X-ray (2-10 keV) selected sources discovered serendipitously in the PV XMM-Newton observation of the radio-loud quasar PKS 0312-77 field, for which also an archival Chandra observation is available. The observations have been carried out as part of the H…
XMM-Newton and the Pleiades - I. Bright coronal sources and the X-ray emission from intermediate-type stars
Briggs, K. R.; Pye, J. P.
We present results of X-ray spectral and timing analyses of solar-like (spectral types F5-K8) and intermediate-type (B4-F4) Pleiads observed in a 40-ks XMM-Newton EPIC exposure, probing X-ray luminosities (LX) up to a factor 10 fainter than previous studies using the ROSAT PSPC. All eight solar-like members have `quasi-steady'LX
Infrared spectroscopy of faint 15 mu m sources in the Hubble Deep Field South: First hints at the properties of the sources of the IR background
Berta, S.; Aussel, H.; Elbaz, D. +8 more
We present a spectroscopic analysis of a sample of 21 galaxies with z = 0.2-1.5 drawn from a 25 square arcmin ultra-deep ISOCAM survey at lambdaeff =15 mu m centered in the WFPC-2 Hubble Deep Field South. Near-infrared spectra are reported for 18 ISO sources, carried out with ISAAC on the VLT, aimed at detecting the redshifted Halp…
Hubble Space Telescope imaging and ground-based spectroscopy of old nova shells - II. The bipolar shell of the slow nova HR Del
O'Brien, T. J.; Harman, D. J.
We present Hubble Space Telescope (HST) WFPC2 imaging of HR Del in filters centred on the lines of Hα, [N II] and [O III], with corresponding William Herschel Telescope (WHT) ISIS slit spectroscopy for the lines of Hα, Hβ, [N II] and [O III]. The data show that the ejected shell of HR Del is composed of many small bright knots. These are distribut…
On the structure and kinematics of nebulae around LBVs and LBV candidates in the LMC
Weis, K.
We present a detailed analysis of the morphology and kinematics of nebulae around LBVs and LBV candidates in the Large Magellanic Cloud. HST images and high-resolution Echelle Spectra were used to determine the size, shape, brightness, and expansion velocities of the LBV nebulae around R 127, R 143, and S 61. For S Dor, R 71, R 99, and R 84 we dis…
Chandra Observation of the Edge-on Galaxy NGC 3556 (M108): Violent Galactic Disk-Halo Interaction Revealed
Wang, Q. Daniel; Irwin, Judith A.; Chaves, Tara
We present a 60 ks Chandra ACIS-S observation of the isolated edge-on spiral galaxy NGC 3556, together with a multiwavelength analysis of various discrete X-ray sources and diffuse X-ray features. Among 33 discrete X-ray sources detected within the IB=25 mag arcsec-2 isophote ellipse of the galaxy, we identify a candidate for…
X-Ray Evidence of a Buried Active Galactic Nucleus in UGC 5101
Nakagawa, Takao; Imanishi, Masatoshi; Terashima, Yuichi +1 more
We present X-ray observations of the ultraluminous infrared galaxy, UGC 5101, thought to contain a buried active galactic nucleus (AGN) based on observations in other wave bands. We detected an absorbed hard component at greater than 3 keV, as well as soft emission in the energy range 0.5-2 keV. The soft X-ray component, possibly due to a modestly…
The Canada-UK Deep Submillimeter Survey. VII. Optical and Near-Infrared Identifications for the 14 Hour Field
Clements, D. L.; Dunne, L.; Eales, S. +5 more
We present the multiwavelength identifications for 23 sources in the Canada-UK Deep Submillimeter Survey (CUDSS) 14h field. The identifications have been selected on the basis of radio and near-infrared data, and we argue that, to our observational limits, both are effective at selecting the correct counterparts of the SCUBA sources. We…