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Hubble Space Telescope
XMM-Newton Joint Program Information

XMM-Newton Cycle 18/HST Cycle 26/27
Joint Program Overview

By agreement with the HST Project, the XMM-Newton Project may award up to 30 orbits of HST observing time each observing cycle. Similarly, the HST Project may award up to 150 ks of XMM-Newton time. The time will be awarded only for highly ranked proposals that require the use of both observatories and shall not apply to usage of archival data. The only criterion above and beyond the usual review criteria is that both sets of data are required to meet the primary science goals. Proposers should have taken special care in justifying both the scientific and technical reasons for requesting observing time on both missions. For these solicitations, no HST time will be allocated without the need for XMM-Newton time on the same target to complete the proposed investigation.

For XMM-Newton's Cycle 18 and HST's Cycle 26/27, the XMM-Newton Observing Time Allocation Committee (OTAC) met in the fall of 2018 and reviewed their proposals. The following six joint XMM-Newton proposals (listed below) have been approved for execution in HST Cycle 26/27. These observations have been loaded with the current Cycle 26 programs.

Discovering the X-ray Broad Line Region in AGN

Elisa Costantini
Space Research Organization Netherlands
Program ID: 15669

Thanks to high resolution spectroscopy, the X-ray emitting broad line region has been recently discovered and studied in few bright type 1 Seyferts. We propose to observe for 120 ks the bright AGN Mrk110, simultaneously with HST-COS. The goal is to model for the first time the panchromatic broad line region emission in a Narrow Line Seyfert~1 galaxy. We will use the broad lines from the optical, UV and X-rays in a global modeling that will characterize the stratification, extend and ionization of the broad line emitting region, whose Xray extension still awaits a full characterization.

MRK-110 09 25 12.8478 52 17 10.39 COS/FUV G130M and G160M 2

Studying Six Galaxy Clusters to be Used as Gravitational Lense Telescopes

Hans Boehringer
University Observatory, Ludwig-Maximilians-University, Munich
Program ID: 15670

The most massive galaxy clusters are extremely valuable study objects for a wide range of astrophysical and cosmological studies. In our completed all-sky X-ray cluster survey we found 6 rare, massive galaxy clusters (M500 greater than 6.4 x 10e14 Msun) in the redshift range z = 0.25 to 0.5 (sweet spot for gravitational lensing studies), which have not been observed in X-ray pointed observations so far (one has a short XMM exposure). We propose these objects for XMM-Newton and the two most interesting systems for HST observations, with a main goal to characterise their properties for lensing studies and their use as gravitational lensing telescopes. In addition these observations complete an important sample of massive clusters to be used for a range of cosmological studies.

RXCJ1310.9+21579 13 10 56.3800 27 57 42.48 ACS/WFC F814W 1
RXCJ1310.9+21579 13 10 56.3800 27 57 42.48 WFC3/IR F110W and F160W 1
RXCJ1717.1+2931 17 17 6.7 29 31 3.36 ACS/WFC F814W 1
RXCJ1717.1+2931 17 17 6.7 29 31 3.36 WFC3/IR F110W and F160W 1

Unveiling the Nature of Fossil Groups with XMM-HST II: Reducing Variance

Renato Dupke
Eureka Scientific Inc.
Program ID: 15671

Fossil groups (FGs) present a puzzle to theories of structure formation. Despite the low number of bright galaxies, their high velocity dispersions and high T X seem to indicate cluster-like potential wells. Their measured c200 are high indicating early formation epochs, in contradiction with the observed lack of expected large cool cores. We have proposed a discriminatory test, using the intracluster light to mass ratio (ICLf/M) in FGs, using XMM and HST. The pilot study was successful and suggests that FGs are not merging and show high ICLf/M ratios in comparison to relaxed systems. We propose to increase the sample of bonafide FGs complementing XMM and HST archived observations to account for sample variance, allowing us to reliably constrain their formation mechanisms and ages.

RXJ1136+0713 11 36 23.72 07 13 37.52 ACS/WFC F606W and F435W 3
RXJ1410+4145 14 10 4.19 41 45 20.88 ACS/WFC F606W and F435W 3
RXJ0856+0553 08 56 40.72 05 53 47.36 ACS/WFC F606W and F435W 3

Catching AGN in Deep Minimum States to Unveil Their Core Environment

Norbert Schartel
European Space Agency - ESTEC
Program ID: 15672

The deep minimum state of AGN is characterized by a strongly suppressed or even absent primary continuum. As the continuum disappears weak spectral features like relativistic iron lines or narrow soft X-ray emission lines from ionised plasmas become highly significant and their parameters can be determined. Therefore deep minimum states offer unique possibilities to investigate in detail the physics of the reprocessed components in AGN, including the immediate vicinity of the supermassive black hole. Applying our experience (several deep minimum observations) we propose 2 triggered 10ks XMM snapshot, one 80ks XMM follow-up simultaneous with one 80ks NuSTAR one 2-orbit HST observation of an AGN in deep minimum state.

AGN-Minimum-Long tbd tbd COS/FUV G130M and G160M 2

Shining light on obscuring outflows in AGN

Jelle Kaastra
Space Research Organization Netherlands
Program ID: 15673

AGN can be obscured by gas streams close to the black hole that shield remote regions from ionising radiation. We witnessed such an event in NGC 5548 and NGC 3783 where 90% of the soft X-rays are blocked by a dense gas stream close to the BLR. Our joint observations with XMM-Newton, NuSTAR and HST/COS showed UV broad absorption lines associated with the X-ray absorption and allowed us to characterise this unique obscuration event completely. We propose to investigate a similar event in another Seyfert 1 using the same instruments. Swift monitoring (98 ks) will be used to find the event, which will be characterised by joint ToO observations with XMM-Newton (150 ks), HST/COS (4 orbits) and NuSTAR (50 ks).

UGC-12163 22 42 39.3364 29 43 31.30 COS/FUV G130M and G160M 2
UGC-12163 22 42 39.3364 29 43 31.30 COS/FUV G130M and G160M 2

A new adventure of the musketeer PSR B1055-52

Bettina Posselt
The Pennsylvania State University
Program ID: 15676

The nearby, middle-aged neutron star PSR B1055-52, one of the so-called Three Musketeers, has been observed once by XMM-Newton in 2000 resulting in a detailed phase-resolved spectral analysis. Chandra observations in 2012 show spectral changes and an apparent greater than 30% flux decrease with respect to the 2000 XMM-Newton observation. These changes are too large to be due to cross-calibration problems. We propose new XMM-Newton observations to probe the apparent spectral changes. Using a better suited instrument mode than the 2000 observations, we will also be able to measure more accurately the magnetospheric spectral component and relate it to the radio and gamma-ray pulse profiles. Furthermore, we will search for phase-dependent absorption features in the new epoch data.

PSRB1052-52 10 57 58.97 -52 26 56.26 WFC3/IR F110W and F160W 1

The programs approved from the previous XMM Cycle 11-18 TACs can be found at the following links: