See the News item for more information. 25 February 2019 Today, the Director of Science (Prof. Guenther Hasinger) has released the 17th Announcement of Opportunity (AO-17) for observing proposals with INTEGRAL. The analysis of safe-mode entry and subsequent de-pointing together with dedicated thruster calibrations of both the standard and redundant Reaction Control Systems (comprising of tanks, fuel pipes and thrusters) showed that INTEGRAL experienced a reduction in pressure (from 5.5 to ~5 bar) in the propellant system; thrusters on both chains are found to be underperforming since then at ~50% level with irregular thrust levels.
1626 for ISGRI. ISOC and MOC teams are on a steep learning curve gaining experience in the new way of operating INTEGRAL. For details, see the website: https://indico.ict.inaf.it/event/1001/overview. Spacecraft operations are managed at ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany. Aims:The galactic black hole candidate XTE J1817-330 was discovered in outburst by RXTE in January 2006. A Thruster Torque calibration with RCS-A will start at 15.00 today.
Two other physical properties characterise a neutron star: their fast rotation and strong magnetic field. In principle, Mars Express, Cluster and INTEGRAL will need to prepare for an end of operations by Dec 2022. Integral, artist’s impression Until now, scientists could not test their predictions, because it is not possible to produce such ultra-strong magnetic fields in laboratories on Earth.
Calibration files for ISGRI before revolution 1626 are being produced and will be available in a few months, stay tuned. 13 October 2020 It was announced today that all ten missions, including INTEGRAL, that got an indicative extension in 2018 were approved by the SPC for operations in 2021 and 2022. Since measures deployed in the ESA’s Member States have disrupted scientific activities in those countries, the INTEGRAL AO-18 proposal submission deadline has been postponed from Friday, 3 April to Monday, 4 May 14:00 CEST. Proposers from all over the world are welcome to participate. ESA uses cookies to track visits to our website only, no personal information is collected. Download.
X-ray and gamma-ray data from ESA’s XMM-Newton and Integral orbiting observatories has been used to test, for the first time, the physical processes that make magnetars, an atypical class of neutron stars, shine in X-rays.
The results appear in ‘Resonant cyclotron scattering in magnetars’ emission’, by N. Rea, S. Zane, R. Turolla, M. Lyutikov and D. Gotz, published in the Astrophysical Journal on 20 October 2008.
Methods: The EPIC-pn camera on-board XMM-Newton was used in the fast read-out burst mode to avoid photon pile-up, while the RGS was used in spectroscopy high count rate mode. In order to further investigate the behaviour of the INTEGRAL system recovery after a RWB coinciding with propellant system pressure drop, and as a test to check a possible new operational approach delaying RWB momentum dumps and thruster usage, scientific operations have temporarily been interrupted in revolution 2243 (that started on the evening of June 22).
The decision was taken during the SPC meeting held on 1 October and follows a comprehensive review of the scientific merits and technical status of the missions. This new strategy involves spending approximately half the observing time pointing to opposite directions in the sky in order to cancel out as much as possible the accumulation of angular momentum caused by the radiation pressure on the solar panels. Contact the organizers at integral2020 (at) inaf.it for further information. Apologies for any inconvenience this may cause. The INTEGRAL Flight-Control and Flight-Dynamics teams managed (working almost completely remotely) to achieve IPS mode during the evening of 17 May. You have already liked this page, you can only like it once.
Notice, Smithsonian Terms of While in the stable Sun pointing safe mode under redundant thruster attitude control, a significant de-pointing took place, automatically recovered within minutes.
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