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Sunspot plume observations in the EUV. The gas pressure differential between the umbra and surrounding region
Doyle, J. G.; Madjarska, M. S.
The electron density over a bright sunspot plume region was evaluated using lines within the O V 760 Å multiplet. The plume showed an intensity enhancement factor of ~9 in the O V lines compared to regions outside the sunspot umbra. Internal agreement between the various ratios is excellent which would suggest that the O V lines do not suffer from…
The quest for hot gas in the halo of NGC 1511
Ehle, M.; Jansen, F.; Heckman, T. M. +3 more
XMM-Newton observations of the starburst galaxy NGC 1511 reveal the presence of a previously unknown extended hot gaseous phase of its ISM, which partly extends out of the disk plane. The emission distribution is asymmetric, being brightest in the eastern half of the galaxy, where also radio continuum observations suggest the highest level of star…
INTEGRAL results on GRB 030320: A long gamma-ray burst detected at the edge of the field of view
Covino, S.; Götz, D.; Mereghetti, S. +9 more
GRB 030320 is the 5th gamma-ray burst (GRB) detected by INTEGRAL in the field of view (FoV). It is so far the GRB with the largest off-axis angle with respect to the INTEGRAL pointing direction, near to the edge of the FoV of both main instruments, IBIS and SPI. Nevertheless, it was possible to determine its position and to extract spectra and flu…
Discovery of a faint R-band drop-out: A strongly reddened lensed star forming galaxy at z = 1.68
Kneib, J. -P.; Schaerer, D.; Pelló, R. +2 more
We report the discovery of an unusual emission line galaxy at redshift z=1.68 found from near-IR imaging and spectroscopic observations with ISAAC/VLT of a faint gravitationally lensed R-band drop-out behind the lensing cluster Abell 1835. From the emission lines of [O II] lambda 3727i, and Hβ this galaxy shows a moderate to high excitation and li…
Abundances of the planetary nebula Hu 1-2
Pottasch, S. R.; Beintema, D. A.; Feibelman, W. A. +4 more
The ISO and IUE spectra of the ``elliptical'' nebula
An extension of Herschel's method for dense and extensive catalogues. Application to the determination of solar motion
Bongiovanni, A.; Vieira, K.; Abad, C. +2 more
We present a way of handling and interpreting stellar proper motions, in which the idea of substituting them by great circles, proposed by Herschel in 1783, allows us to take the entire celestial sphere as a field of application, making possible the study of dense and extensive stellar zones. A suitable mathematical processing of data together wit…
Castor A and Castor B resolved in a simultaneous Chandra and XMM-Newton observation
Burwitz, V.; Stelzer, B.
We present a simultaneous Chandra and XMM-Newton observation of the Castor sextett, focusing on Castor A and Castor B, two spectroscopic binaries with early-type primaries. Our study represents the first unambiguous X-ray detection of all three visual components in the Castor sextett making use of the unprecedented spatial resolution of Chandra. O…
First results of IBIS/ISGRI Cygnus X-3 monitoring during INTEGRAL PV phase
Goldoni, P.; Bonnet-Bidaud, J. M.; Falanga, M. +1 more
We report on preliminary results of IBIS/ISGRI serendipitous observations of Cygnus X-3 in the 15-100 keV energy range during the INTEGRAL Performance and Verification phase. This peculiar microquasar was inside IBIS/ISGRI field of view at a ~ 9deg distance from the pointing direction during Cygnus X-1 staring observations in November a…
JEM-X inflight performance
Andersson, H.; Frontera, F.; Costa, E. +46 more
We summarize the inflight performance of JEM-X, the X-ray monitor on the INTEGRAL mission during the initial ten months of operations. The JEM-X instruments have now been tuned to stable operational conditions. The performance is found to be close to the pre-launch expectations. The ground calibrations and the inflight calibration data permit to d…
A gas and dust rich giant elliptical galaxy in the ISOPHOT Serendipity Survey
Krause, O.; Lemke, D.; Klaas, U. +3 more
We present a multi-wavelength study of the unusual galaxy ISOSS J 15079+7247. With a bolometric luminosity of LFIR ~ 2 x 1012 Lsun this object is one of the most luminous galaxies detected by the 170 µm ISOPHOT Serendipity Survey (ISOSS). We have obtained 1.2 mm continuum and CO (1-0) line observations, optic…