Search Publications

The first GRB survey of the IBIS/PICsIT archive

Mereghetti, S.; Foschini, L.; Di Cocco, G. +6 more

Context. The multi-purpose INTEGRAL mission is continuously contributing to Gamma Ray Burst (GRB) science, thanks to the performances of its two main instruments, IBIS and SPI, operating in the hard X-ray / soft γ-ray domain.
Aims: We investigate the possibilities offered to the study of GRBs by PICsIT, the high-energy detector of the IBIS in…

Filament destabilization and CME release during a long duration flare

Romano, P.; Contarino, L.; Zuccarello, F. +3 more

Context. During complex and long duration solar flares, several filament destabilizations or eruptions can occur that are often related to coronal mass ejections (CMEs).
Aims: We describe the study of an X3.8 long duration event (LDE) that occurred in NOAA 10720 on 17 January 2005 and was characterized by three filament destabilizations and t…

Filaments and the magnetic configuration. I. Observation of the solar case

Meunier, N.; Delfosse, X.

Context. The emission of Ca and Hα is correlated for the Sun, but this does not seem to be true for other stars. We previously demonstrated that this lack of correlation could be due to the presence of filaments.
Aims: We aim to establish a link between the activity level, the magnetic configuration, and the number of filaments, and therefore…

VLT/FORS2 observations of the optical counterpart of the isolated neutron star RBS 1774

Haberl, F.; Motch, C.; Treves, A. +5 more

Context. The X-ray observations performed with the Röntgen Satellite (ROSAT) have led to the discovery of a group (seven to date) of X-ray dim and radio-silent, middle-aged isolated neutron stars (a.k.a. XDINSs), which are characterised by pure blackbody spectra (kT ≈ 40-100 eV) and long X-ray pulsations (P = 3-12 s), and appear to be endowed with…

The effect of environment on star forming galaxies at redshift 1 First insight from PACS (Corrigendum)

Berta, S.; Magnelli, B.; Nordon, R. +33 more

Observations of the recurrent M 31 transient XMMU J004215.8+411924 with Swift, Chandra, HST, and Einstein

Pietsch, W.; Barnard, R.; Garcia, M. +2 more

Context. The transient X-ray source XMMU J004215.8+411924 within M 31 was found to be in outburst again in the 2010 May 27 Chandra observation. We present results from our four Chandra and seven Swift observations that covered this outburst.
Aims: X-ray transient behaviour is generally caused by one of two things: mass accretion from a high m…

V2368 Ophiuchi: an eclipsing and double-lined spectroscopic binary used as a photometric comparison star for U Ophiuchi

Wolf, M.; Harmanec, P.; Yang, S. +8 more

The A-type star HR 6412 = V2368 Oph was used by several investigators as a photometric comparison star for the known eclipsing binary U Oph but was found to be variable by three independent groups, including us. By analysing series of new spectral and photometric observations and a critical compilation of available radial velocities, we were able …

Photometric and spectroscopic observations of asteroid (21) Lutetia three months before the Rosetta fly-by

Lara, L. M.; Lin, Z. -Y.; Duffard, R. +1 more

Context. On its journey to comet 67P/Churyumov-Gerasimenko, the International Rosetta Mission (ESA) was planned to fly-by two asteroids: (2867) Steins and (21) Lutetia. Although classified as an M-type asteroid because of its high albedo, its reflectance spectrum in the near and mid-infrared region, suggests a primitive composition, more typical o…

The plasma emission model of RBS1774

Chkheidze, N.

In the present paper we construct a self-consistent theory, interpreting the observational properties of RBS1774. It is well known that the distribution function of relativistic particles is one-dimensional at the pulsar surface. However, cyclotron instability causes an appearance of transverse momenta of relativistic electrons, which as a result,…

X-ray spectral evolution of TeV BL Lacertae objects: eleven years of observations with BeppoSAX, XMM-Newton and Swift satellites (Corrigendum)

Tramacere, A.; Giommi, P.; Perri, M. +2 more