cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-sl43i4z
title: 086401

description: PSR J1023+0038 is a binary system that hosts a neutron star and a low-mass comma  main-sequence companion star. It has been observed to switch on timescales of years between a radio millisecond pulsar and a disc-dominated state comma  of uncertain origin. After its last switch to a disc-dominated state in 2013 comma  the source has been the object of extensive multi-wavelength monitoring campaigns comma  during which the continuous switch between three X-ray modes openParhigh comma  low and flareclosePar on timescales of 10 s has been observed. Here we propose the ultimate  comma  strictly simultaneous comma  multi-wavelength campaign to study in detail this unique phenomenon. We will involve NuSTAR comma  XMM-EPIC comma  Swift-UVOT comma  XMM-OM comma  VLT-HAWK-I comma  VLA observations to probe models using correlations and lags comma  as well as to study the pulsed signal.
DOI: 10.57780/esa-sowyeaw
title: 084404

description: We have discovered an unprecedentedly long openPar > 10 yrsclosePar X-ray tidal disruption event candidate. It showed several interesting signatures of super-Eddington accretiondoublePoint quasisoft X-ray spectra comma  Eddington-limited luminosity comma  and later transition to the thermal state of much softer spectra. Therefore this event provides a unique opportunity for study of super-Eddington accretion onto supermassive black holes. The source now apprears to be in the thermal state. we request XMM-Newton to have one more observation in AO18 on this target comma  two years after the last monitoring and when the event is turning to a phase of faster decay. Continued monitoring is critical for the modeling of the event and confirmation of its nature as the most spectacular tidal disruption event known.
DOI: 10.57780/esa-ssax3zv
title: 086026

description: We propose observations of the southern disk of M31 comma  which will comma  together with our AO14 observations of the northern disk comma  yield a deep full-coverage map of the hot ISM of the star-forming disk of M 31 on sub-kpc scales out to a radius of virgul10 kpc. The southern disk hosts the intriguingly large stellar association NGC 206 in the major ring comma  where it was most likely disturbed by an encounter with the satellite galaxy M 32. New deep observations will enable us to 1closePar study the morphology as well as temperature comma  density comma  pressure comma  and filling factor of the hot ISM comma  in particular around NGC 206 and 2closePar probe the X-ray source population differences associated with the M 32 interaction by obtaining a complete sample of X-ray sources down to the confusion limit of a few 10elev34 erg-s.
DOI: 10.57780/esa-sxjz08l
title: 086290

description: From a systematic study of the radio properties of luminous red quasars in the SDSS comma  we have found clear evidence that distinguishes them from the more normal blue quasars comma  suggesting that they are a special stage in the co-evolution of AGN. To complement an on-going VLT-XSHOOTER program exploring the differences in the accretion disks of red quasars at z=1.5 comma  we propose new XMM-Newton observations of 5 carefully selected targets comma  which comma  in combination with an archival dataset of normal quasars comma  will allow a controlled study of differences in openPar1closePar nuclear obscuring columns comma  openPar2closePar intrinsic X-ray to optical spectral slope comma  and openPar3closePar coronal properties. Our study is designed to uncover whether red quasars have systematically different accretion disks from normal quasars.
DOI: 10.57780/esa-szbw9kr
title: 089241

description: As a unique nearby analog of high-redshift galaxies at the peak of cosmic star-formation comma  the starburst ESO 338-4 provides a key laboratory to study stellar feedback. We propose deep Chandra observations of this template starburst to determine the luminosity function of X-ray binaries comma  establish their association with star clusters comma  and measure energetics of hot bubbles. Existing HST images will allow to identify optical counterparts of the X-ray sources. Detecting a well sampled population of X-ray binaries is required to measure the X-ray radiative field in the galaxy and to probe the theory of massive binary evolution. Fulfilling these goals demands 300 ks ACIS-I time. We further request 80 ks XMM to probe ULX pulsations and to spectroscopically map the hot galactic corona.
DOI: 10.57780/esa-sziypb8
title: 086215

description: Very recently comma  it has been discovered that ZTF J213056.71+442046.5 is a binary system composed of a white dwarf orbiting a hot subdwarf star in only 39 min. This is the shortest orbital period of any sdOB+WD binary. The orbital separation implies that the subdwarf fills its Roche-lobe comma  making this system an optimal candidate for observations at X-ray energies. The likely presence of X-ray emission is further strengthened by the finding that the periodic modulation of the optical light curve can be explained only invoking the presence of an accretion disk around the white dwarf comma  which occults the subdwarf mass donor star. X-ray observations can give important information on the mass transfer rate comma  on the properties of the WD and on the evolution of this unique binary.
DOI: 10.57780/esa-t1vwmlv
title: 086053

description: There are few intrinsically X-ray weak AGNs reliably identified to date. Such systems may exist preferentially in broad absorption line openParBALclosePar quasars comma  where it is challenging to ascribe the observed X-ray weakness to absorption vs. intrinsic X-ray weakness. We selected two candidates for intrinsically X-ray weak BAL quasars from the well-defined z virgul 2 LBQS BAL quasar sample. These objects are only weakly detected in the current Chandra observations comma  hampering rigorous conclusions about their nature. We thus propose 85 ks XMM-Newton observations for the two candidates comma  in order to confirm their intrinsically X-ray weak nature comma  obtain the fraction of intrinsically X-ray weak BAL quasars comma  and probe the underlying physics.
DOI: 10.57780/esa-t27jnn4
title: 086408

description: The Dark Energy Survey openParDESclosePar is currently the pre-eminent optical-near-IR survey for cosmology. DES uses four probes to study the physical nature of dark energy comma  including clusters of galaxies. To unlock the full potential of DES clusters comma  we require precise information of the galaxy-richness to halo-mass scaling relation comma  i.e. its slope comma  normalisation comma  and scatter. Of these comma  the least well known is the scatter. Therefore comma  one of the highest priorities for DES is to improve measurements of the scatter openParand its evolutionclosePar. For this comma  X-ray observations of a statistically complete sample are essential openPararchival comma  including serendipitous comma  observations are insufficientclosePar. We propose XMM observations of 14 DES clusters comma  to complete a sample of 40 of the richest clusters in DES.
DOI: 10.5281/zenodo.7804994
title: Il fiume Po nelle carte dell'Ufficio dei Confini dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del Po nelle carte dell'<em>Ufficio dei Confini </em>dell'Archivio di Stato di Parma
DOI: 10.5281/zenodo.7804993
title: Il fiume Po nelle carte dell'Ufficio dei Confini dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del Po nelle carte dell'<em>Ufficio dei Confini </em>dell'Archivio di Stato di Parma
DOI: 10.57780/esa-t8u3ozr
title: 086251

description: A remarkable recent development is the discovery of cold fronts at very large radii in the Perseus cluster comma  that are much older than those in cluster cores. Because of this comma  diffusion processes have had much longer to broaden the edge comma  while instabilities have had longer to grow. Recently we extended the XMM mosaic of Perseus to reach the virial radius to the west comma  and have confirmed suggestions from ROSAT that the sloshing extends to the virial radius. Remarkably comma  our new XMM mosaic shows 2 edges near the virial radius. However we are only seeing a small section of themdoublePoint the full scale of the sloshing is yet to be revealed. We propose 4 observations to extend the Perseus mosaic to fully cover the sloshing near the virial radius comma  and fully reveal the extent of the mysterious double edge.
DOI: 10.57780/esa-tcftkig
title: 086108

description: We propose a unique XMM study of 7 galaxy groups selected by UV absorption in HST-COS spectra. Combining XMM observations and UV absorption spectroscopy of these group will yield new constraints on the state of the intra-group medium. The targets are similar in velocity dispersion openParsigmavirgul300-500km-sclosePar and richness. All have broad Ly-a absorption comma  and but only 4 have detectable OVI absorption. The 3 groups with XMM observations show that two with OVI are associated with clear X-ray dominant groups comma  while the other with no OVI is not. We will test the ideas from numerical simulations comma  where the relationships between thermodynamic properties of the hot gas and the presence of multiphase gas depend significantly on feedback mechanisms comma  merger history comma  and star formation history.
DOI: 10.57780/esa-td2cyuj
title: 088265

description: In the low-redshift universe comma  a fraction of the baryons remains unaccounted for on the largest scales and on the galaxy scales comma  which define the global and local missing baryon problems. A promising approach to resolve these problems is to probe X-ray absorption lines imprinted on the spectrum of background quasars. By utilizing our novel stacking method comma  we detected an OVII absorption line in the spectrum of PKS0405-123. We propose deep XMM-Newton observations that will boost the stacked exposure time to 10.4 Ms comma  allowing us to probe the absorption lines to unprecedented depths. We will demonstrate the robust nature of the detection comma  increase its significance to >5sigma comma  and build an accurate gas density profile comma  thereby addressing the global and the local missing baryon problems.
DOI: 10.57780/esa-tdrgf9n
title: 086316

description: V2731 Oph is an intermediate polar with a complex X-ray spectrum including a hot openParkTvirgul100 eVclosePar blackbody component comma  according to a previous short XMM-Newton observation comma  indicative of a locally super-Eddington accretion rate. However comma  it is possible that the temperature measurement was incorrect because V2731 Oph is overabundant in nitrogen comma  which went unnoticed in the previous analysis due to the lack of high S-N RGS spectrum. If overabundance is confirmed comma  it can both solve the hot blackbody puzzle and have important implications on the past evolutionary history of V2731 Oph. We therefore propose a much longer XMM-Newton observation to obtain high quality RGS data. We also request a simultaneous NuSTAR observation to break potential degeneracies among soft and hard component parameters.
DOI: 10.57780/esa-tdu1pj2
title: 086371

description: In solar-type stars comma  rotational shear at the tachocline is thought to power a dynamo comma  generating a magnetic field that heats the star.s corona comma  which produces X-rays. X-ray flux and rotation rates measurements therefore provide insight into the strength of the underlying magnetic field and its dependence on rotation. But this rotation-activity relation remains unconstrained for the slowest rotators openPari.e. comma  Rossby number > 0.8closePar. We propose to observe six 700-Myr-old solar-type slowly rotating Praesepe stars comma  for a total of 157 ks of exposure with the EPIC camera. Our data will provide invaluable information on the rotation-activity relation for the slow rotators comma  enabling tests of dynamo theory in a largely unconstrained regime.
DOI: 10.5281/zenodo.7804982
title: Il fiume Po nelle carte della Raccolta di Mappe e Disegni dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del Po nella <em>Raccolta di Mappe e Disegni </em> dell'Archivio di Stato di Parma
DOI: 10.5281/zenodo.7804981
title: Il fiume Po nelle carte della Raccolta di Mappe e Disegni dell'Archivio di Stato di Parma

description: Schedatura e metadatazione dei contenuti delle carte inerenti il corso del Po nella <em>Raccolta di Mappe e Disegni </em> dell'Archivio di Stato di Parma
DOI: 10.57780/esa-tfbv8tw
title: 090154

description: Radio and X-ray imaging of a newly discovered comma  transient X-ray binary reveals a supernova remnant.  High extinction prevents a mass function for the binary comma  but every available diagnostic signals that the primary is a black hole.  IR imaging suggests a high- or intermediate-mass companion star.  The structure of the SNR is particularly clear in radio comma  and similar to Cas A.  However comma  the X-ray structure is not clearly revealed in a prior XMM-Newton snapshot.  We request 90 ks of good exposure openPar150 ks totalclosePar to reveal the X-ray morphology of the SNR comma  obtain basic age constraints from spectral modeling comma  and to make a test of the remnant type that could reveal the X-ray binary-SNR association as spurious.
DOI: 10.57780/esa-tktokdf
title: 084049

description: Recently comma  very high energy TeV gamma-rays have been detected from the extended source W50-SS433 using the High-Altitude Water Cherenkov Observatory openParHAWCclosePar. Multi-wavelength observations suggest that the extended lobes of W50 are being impacted by the SS433 jets tens of parsecs away. X-ray emission is found to fill the radio lobe out to the radio .ears. comma  softening away from the black hole and with evidence of hard X-rays in the innermost regions pointing to an extreme accelerator. We propose a joint XMM-NuSTAR observation of the HAWC emission comma  coincident with the inner eastern lobe of W50. This broadband X-ray study will comma  for the first time comma  resolve and constrain both the non-thermal and thermal X-ray emission comma  providing a key insight into the nature of this Galactic PeVatron.
DOI: 10.57780/esa-tpa0poc
title: 086198

description: The filamentary dark cloud in Norma is undergoing active star-formation as revealed by a diverse population of protostars comma  T Tauri stars comma  Herbig-Haro objects openParHH 56-57closePar comma  and the peculiar young star V346 Nor. We propose to obtain the first pointed X-ray observation of the Norma cloud. The deep EPIC exposure in combination with archival IR data will allow us to identify comma  classify comma  and map the spatial distribution of X-ray emitting young stellar objects openParYSOsclosePar in the cloud for the first time. We will characterize the X-ray emission of the eruptive star V346 Nor comma  which shows similarities to FU Orionis stars. EPIC will provide a sensitive search for soft X-ray emission from shocked plasma in HH 56-57 comma  as detected in other HH jets.
DOI: 10.57780/esa-ts7tbv5
title: 086065

description: Gamma-Cas analogs are early Be stars displaying very unusual hard X-ray emission with a luminosity intermediate between normal massive stars and XRBs. Both an unexpected magnetic activity in a critically rotating star comma  or accretion in a Be + white dwarf openParor neutron starclosePar binary comma  have been invoked to account for these outstanding features. We request follow-up observations to better characterise the high-energy properties openParX-ray temperatures comma  local absorption and variability patternsclosePar of those Gamma-Cas analogs and candidate analogs lacking sensitive enough observations. The new X-ray data together with the existing optical data will allow us to bring stronger constraints on the X-ray emitting mechanism.
DOI: 10.57780/esa-twpv3g8
title: 088455

description: We ask for 20 ks of XMM-Newton observation of the High Mass X-ray Binary candidate 1H 1255-567 comma  the first pointed observation of this source with a modern imaging X-ray instrument. The aim of the observation is to confirm or refute the X-ray binary nature of the system comma  and to test the hypothesis that this source might instead be a gamma Cas analogue.
DOI: 10.57780/esa-tzw345u
title: 088142

description: PSR B1259-63 is one of only two known GRLBs that hosts a pulsar orbiting a Be star. Close to periastron the system is detected from radio through X-ray up to 10 TeV energies. The latest TeV analysis indicates that in the very high energy domain comma  it exhibits a 3-peak light curve around periastron. While two of the maxima roughly coincide with the periods when the pulsar crosses the Be-star disc and can be explained within existing models comma  the origin of the third peak remains elusive. We ask for joint H.E.S.S.-XMM-Newton observations of this peak in 2021 to probe its periodic appearance in the TeVs and to search for and investigate its X-ray counterpart. Due to ground-based visibility constraints comma  this will be the only opportunity to observe in periastron in TeV and X-rays for next 7 years.
DOI: 10.57780/esa-ubcpji5
title: 086233

description: We request to observe 7 Roma-BZCAT high redshift openParz>3closePar blazars with XMM. These sources are some of the most powerful of their class but crucially lack of X-ray measurements. We propose to observe them in the X-ray with XMM comma  and in the optical with the supplementary observations from the optical monitor openParOMclosePar. The XMM observations will allow us to accurately measure the rising part of the inverse Compton spectrum comma  which is expected to be very hard. The X-rays will be fundamental to determining the power of the jet and to deriving the shape of the underlying electron population responsible for the emission. The optical data will reveal the powerful accretion disk emission that will enable us to measure accretion disk luminosity and derive the black hole mass of these sources.
DOI: 10.57780/esa-ucoi9jv
title: 084302

description: Super-Eddington accretion periods are expected to be extremely important to explain the fast growth of the first supermassive black holes. We propose here a systematic broad-band X-ray study of super-Eddington AGN openPar Edd = 15 to Edd = 427closePar at z < 0.1 by simultaneously observing five of them with XMM-Newton and NuSTAR. We use the best sample available comma  SEAMBHs comma  which contain objects with black hole masses estimated from reverberation mapping comma  making the Eddington ratio estimates extremely reliable. The broad-band observations will allow to shed light on a large number of fundamental issues comma  such as the behaviour of the cutoff energy comma  of the reprocessed radiation comma  of the iron complex and of the soft excess at extreme Eddington ratios.
DOI: 10.57780/esa-ucx30bd
title: 086035

description: Among the unassociated sources detected by the Fermi Gamma-ray Space Telescope comma  we find one 2.5-hr binary from our multi-wavelength studies. The source comma  with an X-ray counterpart comma  has an optical spectrum typical of accretion disks in X-ray binaries comma  and thus is likely a transitional millisecond pulsar openParMSPclosePar system in the disk state. Such systems can switch between the states of being a pure MSP and having an accretion disk around the MSP. Here we request an 11-ks observation of the source for further studies. A spectrum of the source will be obtained to check whether its X-ray emission is consistent with those of redback type of MSPs. We will also search for fast and large-amplitude flux variations comma  which is a distinguishing feature of the transitional systems in the disk state.
DOI: 10.57780/esa-uk7yt9a
title: 086168

description: X-ray Reverberation tracks light travel delay between the continuum and the reflected iron line. Short openPar1e2-1e3 sclosePar iron band delays have been observed in many sources and are attributed to relativistic reverberation. The bright NGC4151 was the first to show these lags comma  but recent data is not consistent with simple reverberation models. On longer time scales comma  the narrow Fe K line was also found to lag the continuum by 3 days. XMM has been instrumental in both measurements. The delays at intermediate timescales openParhours to 1 dayclosePar have however been inaccessible due to visibility constraints. Here comma  we propose to observe NGC4151 for two consecutive orbits to bridge this gap. This will be a significant step towards building a complete picture of the circumnuclear reprocessing material.
DOI: 10.57780/esa-umy70pd
title: 086117

description: The reason why the Herbig Ae-Be stars emit X-rays is not understood. A popular scenario is that the Herbig Ae-Be stars are not the sources of this emission comma  but rather the X-rays come from unresolved low-mass companion stars openParT-Tauri starsclosePar. However comma  our archival study shows that the most luminous Herbig Ae-Be stars can emit X-rays much above what is seen from T- Tauri stars comma  suggesting that -- at least for the most luminous  L>10elev3 comma L_keyOpen odotkeyClose   Herbig Ae-Be stars -- some other mechanism must be responsible for the X-ray emission. Only 8 Herbig Ae-Be stars in this key luminosity range have been observed in X-rays comma  and thus we propose a survey for XMM-Newton to measure the X-ray luminosities of a sample of 24 additional luminous Herbig Ae-Be stars.
DOI: 10.57780/esa-v2muxo7
title: 086145

description: We propose continuation of our long-term monitoring program to identify and study the cyclic behavior of the coronal emission of stars similar to our Sun comma  that has been ongoing since XMM.s AO-1. Five stars in three stellar systems have been monitored at regular cadence for almost two decades comma  providing for the first time clear evidence of long-term cycles in the coronal activity of normal stars. Thanks to the program.s continuity comma  this is a data set with unique legacy value for the understanding of ..normal stellar coronae. Continuation of the program into AO-19 is needed to progress in the understanding of the coronal behavior across different activity cycles comma  and to link the extant time series of XMM data with the photometric X-ray monitoring that will be performed by eROSITA.
DOI: 10.57780/esa-v5pufby
title: 087083

description: What dictates the formation of luminous black hole openParBHclosePar versus neutron star openParNSclosePar X-ray binaries openParXRBscloseParquestionMark Recent studies have shown that some ultraluminous X-ray sources in starburst and high specific star formation rate openParsSFRclosePar galaxies are pulsars comma  while low sSFR galaxies such as M31 have a dearth of accreting BHs. These discoveries have challenged our understanding of XRB evolution and the associated accretion processes. We request a 420 ks NuSTAR observation simultaneous with a 50 ks XMM-Newton observation of the starburst galaxy NGC 6946 openParThe Fireworks GalaxyclosePar to characterize the accreting BH and NS populations and investigate the black hole fraction at luminosities below the NS Eddington limit.
DOI: 10.57780/esa-v8ojrro
title: 089082

description: Fast radio bursts openParFRBsclosePar are millisecond pulses discovered at radio wavelengths. The number of FRB detections has increased rapidly in the last year comma  culminating in the detection of bursts from a Galactic magnetar and the extragalactic source FRB180916 comma  but the mechanism powering FRBs is still unknown. As the Galactic magnetar was detected at radio and hard X-ray wavelengths and theoretical models that associate these bursts with relatively long-lived openParseconds to minutesclosePar non-thermal radiation comma  X-ray follow up is the most promising avenue to explore the spectral energy distribution of FRB emission. We propose a 20 ks NuSTAR-XMM-Newton observation coordinated with CHIME of the periodic FRB180916 during one of its aquestionMarkquestionMarkactiveaquestionMarkquestionMark phases when one or more high fluence radio bursts are expected.