cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-8yspcnm
title: 084295

description: Fossil groups openParFGsclosePar present a puzzle to theories of structure formation. Despite the low number of bright galaxies comma  their high velocity dispersions and high T_X seem to indicate cluster-like potential wells. Their measured c200 are high indicating early formation epochs comma  in contradiction with the observed lack of expected large cool cores. We have proposed a discriminatory test comma  using the intracluster light to mass ratio openParICLf-MclosePar in FGs comma  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 comma  allowing us to reliably constrain their formation mechanisms and ages.
DOI: 10.57780/esa-91r3p8i
title: 089065

description: We propose to monitor 1ES 2344+514 over seven months with the goal of better understanding its intermittent extreme behaviour. 1ES 2344+514 is a nearby openParz=0.044closePar high energy peaked BL Lac. So far comma  clear extreme behaviour of the source has been observed only in high states. During an X-ray flare in 1996 comma  a shift of the synchrotron peak to frequencies above 3*10**18 Hz was reported. A similarly extreme behaviour was not found in subsequent MWL campaigns during low states comma  thus suggesting the extreme behaviour being a feature of high states. Still comma  the small number of published MWL observations does not allow for a coherent picture of the complex spectral behaviour of 1ES 2344+514.
DOI: 10.57780/esa-947kw7f
title: 086190

description: In a recent survey by combining photometry of ASAS-SN and spectroscopy of LAMOST comma  a sample black hole binary candidates were selected. We speculate that they are X-ray binary systems in the quiescent state. To distinguish them from chromospherically active binaries comma  we propose to use XMM-Newton observations to search for their X-ray counterparts. By measuring the X-ray spectrum and X-ray flux comma  we can select the most promising black hole candidates for follow-up observations.
DOI: 10.57780/esa-96gy8kq
title: 088184

description: The X-ray spectral analysis of new Compton thick openParCT-closePar active galactic nuclei openParAGNclosePar represents a fundamental step to understand the physics of the obscuring material surrounding accreting super-massive black holes. However comma  at the present day comma  CT-AGN remain extremely hard to detect. Implementing previously successful selection criteria comma  we propose to target 6 low-redshift candidate CT-AGN from the Swift-BAT 150-month catalog with 10 ks XMM-Newton observations each. This analysis will help determine the true intrinsic fraction of CT-AGN in the local universe and their contribution to the Cosmic X-ray Background openParCXBclosePar.
DOI: 10.57780/esa-98iea8k
title: 084031

description: gamma Cas stars are Oe-Be stars that display an intriguing bright and hard X-ray emission. The origin of this X-ray emission could be either accretion by a compact companion or an interaction between the Be star and its decretion disk. Evidence favouring the latter scenario was obtained over recent years. This includes observations of a quasi-simultaneous decrease by a factor 10 of the X-ray emission of HD45314 as the disk of this star nearly dissipated in 2016. We aim at further constraining the gamma Cas phenomenon by taking advantage of such spectacular variations. For this purpose comma  we propose observing a gamma Cas star next time that its disk undergoes either an outburst or in case it clears away.
DOI: 10.57780/esa-9bzcyqj
title: 089102

description: Understanding the emission from X-ray binaries in high-redshift galaxies is of utmost importance to understanding the heating of the primordial IGM. This program comma  to observe five starbursting comma  High Mass X-ray Binary openParHMXBclosePar-dominated galaxies comma  for a total of 1.49 Ms with NuSTAR and 207 ks with XMM-Newton comma  will provide a representative sample of starburst galaxies for establishing the connection between the 12-25virgulkeV emission arising from neutron star and black hole populations and their host galaxy properties that is highly relevant to high-z galaxies.
DOI: 10.57780/esa-9f3nfdc
title: 086551

description: We have discovered a previously unnoticed X-ray source 3.2 elevkeyOpen circkeyClose   away from the Galactic Center. Its XMM-MOS light curve has a periodic variability at 614.28sopenPar approx 3.8 sigma closePar. Its X-ray spectrum is perfectly described by an absorbed 1.8keV blackbody plus Fe-line features. It has an  L_keyOpen mathrmkeyOpen XkeyClose keyClose   about  1.2times10elevkeyOpen 34keyClose times openParD-10 kpcclosePar elevkeyOpen 2keyClose   erg s elevkeyOpen -1keyClose   and has no obvious optical counterpartopenParfx-fo > 1600closePar. We argue it is most likely a neutron-star ultra-compact X-ray binary with the shortest orbital period so far. We propose an XMM-PN observation to constrain its nature bydoublePoint 1closePar verifying the 614s signal and looking for a possible rotational period comma  2closeParchecking its new spectral shape and whether other spectral components exist with more X-ray photons.
DOI: 10.57780/esa-9j946na
title: 084123

description: Chromospheric activity cycles are often found in old stars comma  but their coronal X- ray counterparts have been difficult to catch. Thanks to XMM-Newton comma  X-ray cycles have been detected in four stars comma  moving forward an exploration of the parameters space of dynamo cycles openParactivity level comma  cycle length comma  etc.closePar. Two stars with known X-ray activity cycles are relatively young openPar500MyrclosePar comma  rising the question at what age and activity level X-ray cycles set in. We propose here 4 short openPar6ksecclosePar observations of Kepler63. It is younger openPar250MyrclosePar comma  has higher activity openParlogLx=29.02CORCHETE_OPENerg-sCORCHETE_CLOSEclosePar and a shorter cycle openPar1.27yrclosePar that the previous targets for such dedicated studies. A single XMM-Newton observing season can cover 1-2 of a full cycle with short snapshots.
DOI: 10.57780/esa-9m4kzsx
title: 084268

description: With the advent of large-scale optical photometric monitoring and exoplanet search programs comma  the number of stars with known stellar cycles has rapidly grown. In parallel comma  advances in theoretical modeling are leading to a revolution in our understanding of stellar structure and magnetic field generation in late-type stars. Still comma  many questions remain comma  and new puzzles have arisen comma  such as the existence of cycles in fully convective stars. X-ray emission is a key diagnostic of stellar magnetic activity comma  and X-ray cycle amplitudes are much larger than in the optical comma  but of the hundreds of stars with confirmed cycles comma  only seven have been monitored in X rays. We request XMM-Newton observations of three stars that will significantly broaden the X-ray perspective on stellar cycles.
DOI: 10.57780/esa-9m6xjic
title: 086020

description: Ongoing studies of magnetic activity at the end of the stellar main-sequence have revealed an emerging dichotomy in the X-ray and radio properties. The hetero- geneous properties of ultracool dwarfs openParspectral type M7 and laterclosePar display either strong coronal-like X-rays with low radio luminosities or predominantly planet-like strong radio emissions with weak X-ray luminosities. This bifurcation is likely driven by the properties of the magnetic field and the stellar rotation. We will explicitly test this hypothesis by filling the parameter space with a TESS-selected sampledoublePoint The new TESS rotation period will be complemented here with both radio and X-ray data spanning the rotation period threshold across which the dichotomy appears.
DOI: 10.57780/esa-a3bme8j
title: 088601

description: Covering the central 20*2.5deg2 of the Milky Way disc with 20ks XMM exposures will allow us to measure the flows of hot baryons emerging from the energetic activity in the disc comma  to detail their impact on the surroundings and to connect the sources in the disc with the base of the Galactic outflow. By connecting the requested XMM scan with the shallow all sky eROSITA survey comma  we will determine whether the activity in the Galactic disc is important for feeding and sustaining the Galactic corona. This study will provide us with an excellent archetype for advancing our understanding of galaxy evolution theory in a Milky-Way-class galaxy. This project will produce a legacy dataset that will be used in the future for multiple purposes comma  including multi-wavelength and time-domain investigations.
DOI: 10.57780/esa-a8f7osp
title: 088076

description: This is a proposal for reobservation of two clusters with highly flared observations from a systematic AO18 programme to study the most massive clusters at z = 0.25 - 0.5 - ideal candidates for gravitational lens telescopes - which had no pointed X-ray observations so far. A major goal is to characterise their properties for lensing studies and their use as gravitational lens telescopes. In addition these X-ray observations complete an important volume-limited sample of massive clusters to be used for a range of cosmological studies. Both clusters with insufficient data show peculiar structure which makes their study exciting on their own. To better resolve crucial structures in the cluster centres we also ask for Chandra exposures.
DOI: 10.57780/esa-a9jrsjz
title: 088163

description: Our successful incursion via XMM-AO18 into the X-rays of newly discovered magnetic cataclysmic variable openParmCVclosePar candidates revealed a promising strategy to identify further X-ray low-luminous intermediate polars openParLLIPsclosePar. We noticed that there seems to be comma  although not a rule comma  common signatures in their optical spectra. Here we propose to take advantage of what we learned and the Fulfil XMM Program to continue a foray into mCV candidates never investigated in X- rays. This time we target handpicked systems that are similar to LLIPs in the optical regime. LLIPs are short orbital period systems pushing forward the understanding of evolution and physics of mCVs comma  and seem to be numerous in an unexplored subclass of intermediate polars openParIPsclosePar.
DOI: 10.57780/esa-aasysjz
title: 088213

description: Iron lines are observed ubiquitously in AGN comma  offering a powerful probe of the black hole surroundings. Mrk 841 provides a puzzling case in which the narrow iron line comma  usually associated with the torus or the broad line region comma  varies on hours time scales. This can be due either an unusually small emission region for the narrow line comma  or due to hot spots orbiting very close to the black hole whose emission is occasionally Doppler-boosted. With the source visibility now allowing for long exposures comma  we propose to observe it for two orbits comma  simultaneously with NuSTAR comma  to solve the puzzle. Confirming any of the proposed mechanisms offer an exciting opportunity to unravel unprecedented details about the line emission region.
DOI: 10.5281/zenodo.7805093
title: Il torrente Enza nelle carte dell'Ufficio dei Confini dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del torrente Enza nel fondo archivistico dell’<em>Ufficio dei Confini </em> dell'Archivio di Stato di Parma
DOI: 10.57780/esa-ab7b1n2
title: 087040

description: No abstract found for current proposal
DOI: 10.5281/zenodo.7805092
title: Il torrente Enza nelle carte dell'Ufficio dei Confini dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del torrente Enza nel fondo archivistico dell’<em>Ufficio dei Confini </em> dell'Archivio di Stato di Parma
DOI: 10.57780/esa-afaxbt7
title: 088055

description: This proposal aims at catching comma  for the first time comma  fast openParhour time scaleclosePar variability in two RQ AGN simultaneously in X-ray and millimeter wavelength. A NOEMA proposal has been submitted at the last AO openPar10 Sept. 2020closePar and we ask in this proposal for 50 ks per object of openParstrictly simultaneousclosePar XMM time. Hour time-scale variability corresponds to 10-100 gravitational radii light travel time around a supermassive black hole of 10elev7 Msun. A correlated variability observed between both wavelengths would be a direct proof that the mm emission in RQ AGN is produced very close to the black hole comma  in a region consistent with the so-called X-ray hot corona.
DOI: 10.57780/esa-ahyx6lh
title: 086403

description: Changes in the amount of material reaching the accretion disk boundary layer can drastically modify its structure. We are witnessing such changes in a symbiotic recurrent nova comma  T CrB comma  for the first time. Two observations with NuSTAR and XMM have revealed that the accretion rate has increased by a factor of about 10 and that the boundary layer has become optically thick. The next step toward our understanding of the current state is to observe T CrB when it returns to its quiescence level comma  which may happen during AO19. This ToO observation will allow us to test the idea that nova eruptions in T CrB follow after multi-year periods of enhanced accretion onto the white dwarf due to an accretion disk instability. It will also help us study disk instablity events in large accretion disks.
DOI: 10.57780/esa-akb2nll
title: 086443

description: We propose to observe the bright quasar 3C 234 for 160 ks using the RGS as prime instrument. This observation will provide the first deep high-resolution X-ray spectrum ever obtained of a narrow-line radio-loud AGN. Our preliminary RGS data of April 2019 display comma  for the first time comma  a clear evidence of soft X-ray emission lines in an obscured radio-loud AGN. The superior spectral quality that will be achieved with the new observation will allow us to unambiguously determine the physical conditions of the ionized gas. This will provide an unprecedented insights on the longstanding debate about the nature of the soft X-ray emission in radio-loud type 2 AGN.
DOI: 10.57780/esa-atimc5y
title: 088486

description: During AO 18 our team discovered the presence of two IR bursts lagging thermonuclear Type-I X-ray burstsdoublePoint this allowed us to put the first constraints on the orbital period of the source 4U 1728-34. Moreover comma  the profiles of the newly discovered IR bursts showed intriguing .dips. just after the onset of the X-ray bursts. The aim of this proposal is to use the novel method of X-ray-IR burst lag to measure the orbital period of 4U 1728-34 and two other sources comma  and to quantify the presence of .dips. in their IR reverberation comma  signatures that would indicate burst-induced changes in the geometry of the accretion flow. We therefore ask to perform 4 openPartotal 56ksclosePar XMM pointings to be matched by 4 openPartotal 14hclosePar HAWK-IarrobaVLT observations of 4U 1728-34 comma  4U 1705-44 and 4U 1636-53.
DOI: 10.57780/esa-awtxc3g
title: 088170

description: We propose for 68 ksec of observing time on XMM-Newton to monitor X-ray activity on four pairs of virtually identical twin M dwarfs. These twin wide binaries are comprised of stars with nearly identical masses comma  ages comma  and compositions. Evolutionary models and conventional thinking suggest that such sets of twin stars should evolve nearly co-equally comma  resulting in similar levels of magnetic activity. These XMM-Newton data will be used in concert with optical monitoring that provides information about short-term flaring comma  medium-term rotation periods comma  and long-term stellar spot cycles comma  which can then be correlated with X-ray activity. This work is carried out as part of CoI Couperus. Ph.D. thesis. This will be a robust test of magnetic predictability.
DOI: 10.57780/esa-awweqaw
title: 091039

description: We propose a 80 ks ToO observation of a high-redshift openParz>=3closePar blazar during a gamma-ray flare detected by Fermi-LAT. So far comma  only 12 high-redshift blazars have been detected in IquestionMark-rays. These objects are the most luminous and massive objects in the Universe comma  which allow to study the formation of active galactic nuclei in the early Universe. Because the high-energy hump of their SED peaks in the MeV range comma  X-ray and gamma-ray data is needed to constrain the hump s shape. We propose to get high-sensitivity comma  simultaneous X-ray data during enhanced IquestionMark-ray activity of a blazar at high redshift. The data will be complemented by triggered radio observations. The resulting multiwavelength data set will yield important knowledge on the behaviour of flaring MeV blazars for future MeV telescopes.
DOI: 10.57780/esa-axdu4mw
title: 086264

description: Surveys in the 2020s comma  notably the CMB-S4 program and Athena comma  will reveal galaxy clusters at high redshifts comma  all the way back to zvirgul3 comma  when they first formed. Unveiling the properties openPardensity comma  temperature comma  entropy comma  metallicityclosePar and evolution of the intracluster medium and the galaxy-halo connection in these early-forming systems will be among the primary science goals of both Athena and any Chandra successor. While many of the most exciting questions about the initial formation of galaxy clusters must wait for next-generation X-ray missions comma  we can lay an important foundation now by extending studies of statistical cluster samples into the z>1 regime.
DOI: 10.57780/esa-b5ftyhm
title: 086496

description: In May 2019 the black hole GRS 1915+105 underwent a transition to a new .obscured X-ray state. comma  characterised by markedly increased radio flaring activity. Despite the apparent drop in the X-ray output comma  the radio jet seems to be fed at high rates comma  similarly to what has been observed in V404 Cyg in 2015. We are observing the target on October 12th comma  2019 simultaneously with XMM and INTEGRAL openParDDTclosePar comma  and a number of radio facilities. Here we propose a follow-up Target of Opportunity observation of GRS 1915+105 comma  to be performed simultaneously by XMM and INTEGRAL openPar45ks eachclosePar when GRS 1915+105 evolves away from this new obscured state openParand perhaps to quiescence after 27 yearsclosePar comma  to probe the accretion-ejection processes. Similar length radio coverage is guaranteed through pre-approved time.
DOI: 10.57780/esa-b7ab2jg
title: 088003

description: gamma Cas objects are Be stars presenting an unusually intense and hard X-ray emission. Currently comma  25 such objects are known but the origin of their X-ray peculiarities remains debated. By means of snapshots of carefully selected objects comma  we propose to sensitively test one of the competing scenarios aiming at explaining this phenomenon.
DOI: 10.57780/esa-b7yp05r
title: 089045

description: Active galactic nuclei openParAGNclosePar comma  which represent the growing phase of supermassive black holes openParSMBHsclosePar comma  allow us to study the accretion history of the SMBH. Population synthesis models predict that comma  at the peak of the global SMBH growth openParzvirgul1.5--3closePar comma  nearly 50 % of all AGN should be Compton thick openParCTclosePar. Discovery of CT-AGN at high-redshift is still a challenging task. Here comma  we propose to observe jointly with NuSTAR and XMM-Newton a bright CT-AGN candidate at redshift z=2.99 comma  selected from the XMM serendipitous source catalog. The unabsorbed rest-frame 2-10 keV luminosity of the source is found to be Lxvirgul5e46 erg-s comma  which potentially makes it the largest intrinsic luminosity quasar ever observed in X-rays comma  and currently the only CT-AGN candidate that is observable by NuSTAR at z>virgul3.
DOI: 10.57780/esa-bcxucr1
title: 086191

description: A new type of X-ray transients was very recently discovered and named X-ray Quasi-Periodic Eruptions openParQPEsclosePar. This phenomenon likely traced comma  around a black hole openParBHclosePar of a few hundred thousands solar masses comma  the ongoing formation and stabilization of an accretion flow analogous to the one that we observed in more massive sources. Combining the scanning capabilities of eROSITA comma  launchen in July 2019 comma  with subsequent deeper XMM-Newton observations comma  we can continuously identify QPE candidates with the former and confirm their nature with the latter. This synergy will provide precious insights on BH growth and evolution.
DOI: 10.57780/esa-bms6zhf
title: 086396

description: The dark matter self-interaction cross-section depends on velocity and their model claims to explain observations from dwarfs to massive clusters. We need to test these models at galaxy group scales comma  where no usable data exist. Analysis from even a single system will be valuable. We propose a 40 ksec observation of a massive galaxy group HSC J1441-0053 to put the first constraints in this mass range. This is no ordinary openParlensingclosePar galaxy-group -it has lensed images of different sources at varying angular radii which allows us to get more accurate constraints on the inner density profile than any other openParnon-closePar lensing galaxy groups at similar masses and redshift. The accurate centroid determination and independent mass estimation with XMM are vital to derive accurate mass model.
DOI: 10.57780/esa-bnq7joh
title: 086184

description: Blazars are AGN with powerful relativistic jets. While their high energy emission processes are still poorly understood comma  upcoming X-ray polarization observations can shed much needed light. ISP blazars are particularly interesting since their X-ray emission falls in the transition region between synchrotron and Inverse-Compton openParICclosePar providing ideal laboratories to test emission scenarios. Here we propose an keyOpen it XMMkeyClose  observation of one of the best ISP candidates aiming to quantify its synchrotron and IC contributions through the 1-10 keV band. The proposed observations will allow for a detailed prediction of the X-ray polarization and a deeper understanding of the blazar SED.
DOI: 10.57780/esa-bqo8u6b
title: 084088

description: Symbiotic binaries---compact objects openPartypically white dwarfsclosePar accreting from cool giants--- are laboratories for accretion physics and the progenitors of some supernovae. The giant outshines many optical signatures of accretion comma  so almost all known symbiotics have been found through emission line surveys. Symbiotics identified in this way often contain luminous WDs with shell burning on their surfaces. But now comma  using the SkyMapper survey comma  we are using uvg colors and variability to find both burning and non-burning symbiotics. Here we request sensitive X-ray exposures and UV light curves of our best candidates comma  which only XMM can provide. Detecting X-ray emission with EPIC or UV flickering with the OM will validate our method and reveal a hidden population of non-burning symbiotics.
DOI: 10.57780/esa-brvcnc1
title: 086381

description: Sloshing cold fronts observed at intermediate radii of galaxy clusters carry essential information on the macro-scale dynamical history and the micro-scale cluster physics. Previous Suzaku studies of the nearest cluster comma  Virgo comma  revealed two promising cold fronts at radii of 200-300 kpc to the south and west of M87 with pronounced temperature and density discontinuities. We propose three XMM-Newton EPIC observations to map the entire underlying sloshing front and to characterize its properties to a significantly better accuracy than was achieved with Susaku. The proposed study will allow us to test the suppression of fluid instabilities in the intracluster medium and to probe the evolution of the sloshing cold front over the past few billion years in this dynamically young cluster.