H.E.S.S. observations (2004-2006) have revealed extended VHE gamma-ray emission in several parts of the W28 complex, hosting the Supernova remnant (SNR)G6.4-0.1. The strongest gamma-ray emission is however located in a regionoutside of the SNR boundary towards the South of W28. We propose XMM-Newtonobservations (60 ks in 2x30 ks pointings) of this southern gamma-ray source forwhich, at present, no dedicated coverage at X-ray energies exists. A potentialcounterpart for this VHE gamma-ray source is the ultra-compact HII region W28A2,exhibiting a powerful bipolar molecular outflow and being a bright radio and IRsource. With the X-ray data, we will can test this hypothesis, and also tounveil the role of the relatively old SNR G6.4-0.1 in this part of the unique W28 complex.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-04-03T07:50:05Z/2008-04-03T16:58:42Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Stefan Funk, 2009, 'Disentangling the multiwavelength picture of the VHE gamma-ray emission in W28', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fjtu5qi
