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An unusually fast interplanetary coronal mass ejection observed by Ulysses at 5 AU on 15 November 2003
St. Cyr, O. C.; McComas, D. J.; Balogh, André +7 more
On 15 November 2003, at ∼2030 UT, Ulysses/SWOOPS observed the onset of a large, unusually fast interplanetary coronal mass ejection (ICME) in the solar wind at 5.2 AU. Ulysses measured the peak solar wind flow speed associated with this event, vmax = 993 km s-1, in the turbulent sheath region preceding the ICME. This is the f…
An X-Ray Transient and Optical Counterpart in the M31 Bulge
Williams, Benjamin F.; McClintock, Jeffrey E.; Kong, Albert K. H. +3 more
We have obtained snapshot images of a transient X-ray source in M31 from Chandra ACIS-I and the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS). The Chandra position of the X-ray nova was R.A.=00h42m56.038s+/-0.08", decl.=+41deg12'18.50"+/-0.07". The transient was active for at least 6 mon…
Evaluation of the sensitivity to mechanical vibrations of an IR Fourier spectrometer
Saggin, B.; Comolli, L.
This article presents an experimental and theoretical investigation of the sensitivity to mechanical disturbances of a Fourier-transform infrared spectrometer, the Planetary Fourier Spectrometer, currently orbiting around Mars onboard ESA Mars Express orbiter. A theoretical analysis has been performed in order to highlight the expected effects of …
Saturn's Variable Magnetosphere
Hansen, Kenneth C.; Gombosi, Tamas I.
Since the Cassini spacecraft reached Saturn's orbit in 2004, its instruments have been sending back a wealth of data on the planet's magnetosphere (the region dominated by the magnetic field of the planet). In this Viewpoint, we discuss some of these results, which are reported in a collection of reports in this issue. The magnetosphere is shown t…
Structure of the interplanetary magnetic field during the interval spanning the first Cassini fly-through of Saturn’s magnetosphere and its implications for Saturn’s magnetospheric dynamics
Jackman, C. M.; Milan, S. E.; Cowley, S. W. H. +2 more
We examine the interplanetary magnetic field (IMF) data obtained by the Cassini spacecraft during a 5 month period spanning the first fly-through of Saturn's magnetosphere, this interval corresponding to six solar rotations at the spacecraft. It is shown that the structure of the interplanetary medium was consistent with expectations for the decli…
Near-relativistic electron emission following the 28 October 2003 X17 flare
Simnett, G. M.
The 28 October 2003 solar flare event was one of the largest electron events above 50 keV of the current solar cycle. The event was associated with a major flare, at least one fast coronal mass ejection (CME), and a prominence eruption. The evolution of the electron spectrum for this event enables us to resolve three, or possibly four, separate el…
VINCI-VLTI measurements of HR 4049: The physical size of the circumbinary envelope
Paresce, F.; Wittkowski, M.; Antoniucci, S.
We present the first detection of the envelope which surrounds the post-AGB binary source HR 4049. VINCI-VLTI K-band interferometric observations of this source imply the existence of a large structure with a Gaussian angular FWHM 22.4 ± 1.4 mas or uniform disk diameter of 34.9 ± 1.9 mas. With the Hipparcos parallax of 1.50 ± 0.64 mas these values…
A cold globule with a Class 0/I embedded source
Lemke, D.; Lehtinen, K.; Mattila, K.
Infrared observations of the dark cloud DC 303.8-14.2 and the embedded point source IRAS 13036-7644 have been made with the ISOPHOT instrument aboard ISO at 7.7 µm, 60 µm, 100 µm and 200 µm. We have compared the properties of dust in DC 303.8-14.2 and the Thumbprint Nebula (TPN), a morphologically similar globule but withou…
On the Discovery of the First Galaxy Selected at 350 Microns
Eisenhardt, Peter R.; Clements, David L.; Gonzalez, Anthony H. +17 more
We report the detection of a 3.6 σ source selected at 350 µm in the Boötes Deep Field. The source, the first short-wavelength submillimeter-selected galaxy (SSG 1), was discovered as part of a blank-field extragalactic survey using the 350 µm-optimized Submillimeter High Angular Resolution Camera (SHARC II) at the Caltech Submillimeter…
Comparison of blinkers and explosive events: A case study
Innes, D. E.; Parnell, C. E.; Brown, D. S. +1 more
Blinkers are brightenings at network cell junctions that are traditionally identified with SOHO/CDS and explosive events or high velocity events are identified in high resolution UV spectra obtained from HRTS and SOHO/SUMER. Criteria are determined to facilitate objective automatic identification of both blinkers and explosive events in both SOHO/…