cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-cv2pvpo
title: 088090

description: We propose a 70 ks XMM-Newton observation with simultaneous NuSTAR coverage of the HMXB GX 301-2 at phi = 0.5-0.7 at apastron of the highly eccentric orbit when the wind of the companion is less disturbed by tidal interaction with the neutron star and the source is bright enough to enable studies of short-term absorption variability. This will only be the second XMM-Newton observation of GX 301-2 and the first outside of the pre-periastron flare. It will allow us to study the structure of the dense slow wind of the B1 Ia+ companion Wray 997 and to probe wind accretion in such an extreme environment. We will additionally illuminate the properties of the accretion columns through pulse-phase resolved spectroscopy and through variability studies of the cyclotron lines. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-73281
title: Lake Hughes fire, 1953

description: 17 images. Lake Hughes fire, 24 August 1953. General views of brush fire at Lake Hughes.; Caption slip reads: "Photographer: Olmo. Date: 1953-08-24. Reporter: Adler. Assignment: Lake Hughes fire. Brush fire near Lake Hughes. Firemen & boys trying to keep flames from jumping firebreak; County Fire Chief Keith Klinger".
DOI: 10.57780/esa-d20zsu1
title: 090086

description: A substantial fraction of accreting IMBHs show suppressed X-ray emission compared to the expectation from the active galactic nuclei (AGNs) accretion disk-corona connection. They also show unusally strong X-ray variability. We propose a systematic XMM-Newton survey (8-25 ks exposures) of the 14 extremely X-ray weak (by factors of  and amp amp amp gt 10) accreting IMBHs selected from previous Chandra snapshot coverage. We aim to identify large-amplitude X-ray variability and characterize X-ray spectral properties. We will determine whether absorption from clumpy disk wind associated with super-Eddington accretion is responsible for the extreme X-ray weakness and X-ray variability and thus to unify these IMBHs and super-Eddington accreting AGNs under the same physical scenario. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-d7dlw6l
title: 090473

description: Every major modern hydrodynamical simulation suite now includes a prescription for AGN feedback to reproduce realistic populations of galaxies. However these simulations generally do not offer much insight into the nature of feedback. On the other hand the hot gas content of galaxy groups is highly sensitive to the implemented feedback scheme: the predicted gas fraction differs by an order of magnitude from one simulation to another. Here we propose to observe a sample of 40 galaxy groups exhibiting X-ray emission on scales  and amp amp amp gt 12 with the aim of providing benchmark thermodynamic and gas fraction profiles out to R500 without requiring any extrapolation. The proposed program will gather a well controlled sample of systems spanning an order of magnitude in mass 1e13  and amp amp amp lt  M500  and amp amp amp lt  1e14 Mo. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dcqkfeo
title: 088421

description: SN 1987A was the first naked eye supernova since Kepler.s SN of 1604. In the last few years the blast wave has been interacting with the dense circumstellar material which provided us the first opportunity to monitor the evolution from a supernova to a supernova remnant. SNR 1987A is now entering a new evolution stage. We expect to detect for the first time the X-ray emission from the shocked ejecta and the high-latitude material beyond the equatorial ring in the nearest future. This new information will allow us to deeper study the explosion mechanism and progenitor properties. It could be also important to look for non-thermal X-rays related to the particle acceleration. Aiming at these new features we propose a 90 ks XMM-Newton observation of SNR 1987A. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dqcmzi6
title: 090300

description: Our HST and Keck observational campaigns have detected for the first time escaping atmospheres around multiple young mini-Neptunes.  Photoevaporation from these planets shapes exoplanet demographics but one of the biggest sources of uncertainty in modelling the outflow is the X-ray and extreme UV spectrum of the star.  Stellar EUV cannot be measured due to interstellar absorption and must be inferred from the X-ray luminosity.  We propose a survey to measure the X-ray spectra of four new young active stars hosting small ( and amp amp amp lt 3.5 R_Earth) planets all of which we are targeting for helium outflow observations with Keck.   As a bonus XMM.s OM will measure the MUV (virgul200 nm) flux which destroys metastable helium and is therefore critical to modelling the helium signal we observe. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dsdobq9
title: 088621

description: The growth of Supermassive Black Holes powering luminous quasars at the Epoch of Reionization (EoR z and amp amp amp gt 6) is a hot topic in astrophysics. These quasars are being characterized with large multiwavelength campaigns with current flagship observatories. X-ray observations performed so far provided mostly  and amp amp amp lt  15 counts in 0.5-10 keV spectra and thus a poor characterization of their properties. We propose HYPERION a 2.3 Ms Multi-Year Heritage programme to dramatically improve data quality to 100 counts for 15 luminous quasars at EoR delivering unprecedented constraints on nuclear properties accretion ejection disc/corona complex. It will nicely complement observations at other wavelengths enabling meaningful X-ray spectroscopic studies at EoR to begin. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-dt27knh
title: 090351

description: We propose a 73 ks observation of the spectacular merging cluster Abell 2061 that resides in the Corona Borealis supercluster and has a slingshot configuration. Previous X-ray investigations revealed the presence of a cold front and an indication of a shock front on the southwestern side of A2061. Interestingly  the shock candidate and a radio relic have an unexplained offset.  This unique feature is most likely originated from poorly understood slingshot activity. Towards better understanding of the unexplained offset between the shock and radio relic  the proposed observation aims to determine the spatial coincidence of the shock front and the relic. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-55064
title: Fare hearing Los Angeles Transit Lines, 1953

description: 2 images. Fare hearing Los Angeles Transit Lines (L.A.T.L.), 2 September 1953. Kenneth Potter (Public Utility Commissioner); C. Ray Bryant (Examiner); Stanley M. Lanham (Vice-President, L.A.T.L.); Henry E. Jordan (Engineer, representing City of Long Beach).; Caption slip reads: "Photographer: Miller. Date: 1953-09-02. Reporter: White. Assignment: Fare hearing. 23-24: Crowd at Public Utility Commission hearing protesting bus & streetcar fare hikes requested. Man (right) standing is Henry E. Jordan, engineer, representing City of Long Beach".
DOI: 10.57780/esa-dw2qh5s
title: 090017

description: It is a fundamental prediction from the LambdaCDM cosmology that massive galaxies have an extended X-ray emitting corona produced by the accreted gas from the intergalactic space. Massive isolated spirals provide the best place to search for this accreted hot CGM and the missing baryons contained in it. Previous X-ray observations target on massive spirals either too distant or too nearby (M31). We propose mosaic XMM observations covering r and amp amp amp lt 350kpc from the Sombrero the most massive spiral at d and amp amp amp lt 30Mpc. We will search for signatures of the accretion atmosphere via the radial distributions of the X-ray intensity as well as the density temperature thermal pressure radiative cooling timescale and metallicity of the hot gas. We will also quantify the baryon budget of this extended hot CGM. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-e7jfsrz
title: 090371

description: On behalf of the EHT.s Multiwavelength (MWL) Working Group we propose a joint campaign on M87* coordinated in part with EHT: 50 ks XMM-Newton 4 orbits Hubble  50 ks NuSTAR. These observations will improve constraints on (1) the SED of M87* and its particle acceleration processes as well as (2) the variability of the famous jet across the electromagnetic spectrum. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-efiiwvs
title: 093179

description: #1 SN2023ixf  #2 AT2021lwx  #3 AT2023cvb  #4 1E2259+586  #5 SAX J1324.4-6200  #6 GX 304-1  #7 ngc 5273  #8-12 WISEA J045649.8-20l #13 2MASX J02344872-4419325  #14 1ES 1927+654  #17 2SXPS J195654.1+304938 [truncated! Please see actual data for full text]
DOI: 10.57780/esa-elloeru
title: 090002

description: gamma Cas objects are Be stars presenting an unusually intense and hard X-ray emission but the origin of their X-ray peculiarities remains debated. By means of snapshots of carefully selected objects we propose to sensitively test one of the competing scenarios aiming at explaining this phenomenon. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-102361
title: St. Thomas Moore Guild, 1960

description: 3 images. St. Thomas Moore Guild. April 13 1960. Mrs. John Favero; Mrs. Henry Pfeil; Mrs. William Brown. (Sleeve reads: S-12746.); Caption slip reads: "Photographer: Wilson. Date: 1960-04-12. Reporter: 'Soc.' Assignment: St. Thomas Moore Guild, Alhambra. L. to r., 5/6/7: Mrs. John Favero; Mrs. Henry Pfeil (president); Mrs. Wm. Brown".; Supplementary material reads: "Photo assignment for Tuesday, April 12 at 1:30 p.m. Pls go to home of Mrs. Favero, 2801 Montezuma Drive, Alhambra, AT 49225, get shots of women from St. Thomas Moore Guild planning fashion show. Candid, Three cols. Contacts Wednesday. Thanks Carter Ludlow".
DOI: 10.57780/esa-f1tcyf3
title: 088247

description: We propose to observe the first gamma-ray emitting z and amp amp amp gt 3 BL Lac object 4FGL J1219.0+3653 (z=3.59) for 50 ksec with EPIC-PN CCD on XMM-Newton. It is the only spectroscopically confirmed BL Lac source beyond z=3. However this source has no previous X-ray spectral measurements. The XMM observations will allow us to characterize the X-ray spectral behavior of the source which will enables us to accurately determine the associated jet power and the particle population responsible for the observed emission. We will compare the derived results with other gamma-ray emitting z and amp amp amp gt 3 flat spectrum radio quasars. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-fcsoiil
title: 090220

description: We request 190 ks on a uniform sample of 12 optically-selected low-z radio-quiet SDSS quasars.  The range of L/LEdd complement the virgul60 well-studied but potentially biased (in terms of L/LEdd) ..reverberation mapped. (RM) quasars.   With both SDSS and HST spectroscopy we are able to estimate L/Ledd from 3 optical/UV-based estimators.  X-ray data from Chandra enables a 4th L/LEdd estimator (alpha_ox) for the full sample of 25 objects.  The 12 proposed targets lack sufficient Chandra counts to investigate the robustness of the hard X-ray spectral index Gamma as an indicator of  L/LEdd.   Our observations will enable intercomparison of 5 optical/UV and X-ray estimators of L/LEdd for a well-defined sample of quasars. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ffs98c5
title: 090028

description: We propose a deep observation of the CC cluster Abell 2667 where a recent study highlighted the presence of cold gas associated to an incipient cooling flow. The radio and the X-ray nuclear emission of the BCG depicts a situation similar to the Phoenix cluster but with a virgul20X lower nuclear power and 50X lower SF rate. Preliminary spectral analysis on a short XMM observation shows hints of a mass flow of virgul100 Msun/yr below 1 keV consistent with the onset of a massive cooling flow. Our main scientific goal is to measure the mass deposition rate in this ..young-Phoenix. BCG making use of the full strength of XMM by (EPIC + RGS data) to cover a new parameter range in the dot M-SFR plane and provide a more complete picture of the cycle of baryons in the central regions of clusters. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-fkw3ggc
title: 088418

description: X-ray data can help to better understand surface properties and atmospheric composition magnetospheric interactions and the geometry of neutron stars. Out of 2800 known radio pulsars only about %10 are detected in X-ray. Restricting ourselves to mainly bright sources or lucky finds may cause an observational bias in particular for pulsars with low spin-down powers where possible evidence for increased heating or non-dipole magnetic field components is observed. We propose a continuation of our deep legacy survey of nearby pulsars to obtain a less biased view of neutron stars X-ray properties. The proposed targets will fill in the crucial parameter space of the X-ray luminosity-spin-down power diagram which is essential to understand the physics of neutron stars and pulsars. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gdot9iv
title: 091307

description: The primary X-ray emission observed in AGN is believed to be produced from a tiny region surrounding the SMBH namely the corona.  A critical coronal compactness versus temperature threshold is predicted above which any increase in the source luminosity would then generate positron-electron pairs rather than continue heating the coronal plasma.  Current observations show that all local AGNs populate the region below this critical line. However these models have rarely been probed in the high-luminosity regime where the tightest constraints can be made on the coronal models.  Here we propose four high-luminosity quasars (zvirgul1-2) to more than double the current sample size of high-luminosity quasars to further constrain the coronal models and thus better understand the physics of coronae. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gh9gzrm
title: 090052

description: We propose to use the unmatched sensitivity of XMM-Newton to detect and characterize   X-ray emission of an enigmatic quasi-Wolf-Rayet star for the first time. Thousands members of this important class of post-interaction binaries are expected to lurk in the Milky Way  but  so far only one star  was positively identified -- our target HD 45166. To advance our understanding  of late stages of binary evolution and of the progenitors of stripped supernovae the X-ray examination of HD 45166 is urgently needed. We propose a low-risk high-gain XMM-Newton study designed to determine X-ray luminosity and measure the spectral hardness of this important object.  With only 17 ks of EPIC time we will explore a new  territory not yet charted in the X-ray . [truncated! Please see actual data for full text]
DOI: 10.57780/esa-gi2ew9q
title: 088177

description: We propose to observe 4 X-ray bright gravitationally lensed mini-BAL quasars. The main scientific goals are to: (a) Investigate whether relativistic outflows are a common property of high-z mini-BAL quasars (b) infer the range of outflow properties of quasars at a redshift range where AGN feedback is thought to have had its major impact of galaxy evolution. Specifically we propose to add to the current sample 4 lensed quasars with properties that will significantly increase the parameter space of our study in UV outflow velocity and (c) test for the possible co-presence of moderate velocity outflows of a few 1000 km/s detected in the UV at distances of virgul100 parsec and ultrafast outflows launched at 10-100 rg scales in high redshift quasars. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-101969
title: Trujillo's gal friend (sailed with him), 1958

description: 2 images. Trujillo's gal friend (sailed with him), 16 June 1958. Lita Milan -- 23 years (sailed with him); Gene Corman.; Caption slip reads: "Photographer: Wesselman. Date: 1958-07-16. Reporter: Farrell. Assignment: Trujillo's girl friend. Lita Milan, 23, with Gene Corman, co-producer of 'I Mobster' which she is to play in for National Pictures".
DOI: 10.57780/esa-gl3ct93
title: 088248

description: The overarching goal is to identify the unknown progenitors of both H-poor core- collapse and Calcium-Rich supernovae (SNe) by mapping the mass-loss history in the final years before explosion through the novel combination of X-ray emission and flash spectroscopy as a probe of the circumstellar environment. This coordinated observational technique is now possible with our access to the Young Supernova Experiment (YSE) a new untargeted transient survey designed to systematically discover SNe in the first days after explosion. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-glmhriq
title: 091419

description: No abstract found for current proposal  (This is a scientific proposal for an ESA mission. For specific information please contact ESDC Helpdesk -  https://support.cosmos.esa.int/esdc)
DOI: 10.57780/esa-gvhqzrr
title: 093239

description: #1: ESO 184-G042         #2: The Cloverleaf ORC          #23: Sgr A* #3: V404 Cyg             #4: 2SXPS J195654.1+304938 #5: GX399-4              #6: GX13+1 #7: ZTF22abajudi         #8: J0704-37 #9: pi Aqr               #10: GRB231115A #11: GRB231117A          #12: ASASSN-14ko #13: AT2023lli           #14: eRO-QPE1 #15: AT2022upj           #16: ZTF21abccdld #17-18: NGC 4395         #19: ZTF20abwtifz #20-21: 1ES 1927+654     #22: AT2020ayl [truncated! Please see actual data for full text]
DOI: 10.57780/esa-h1symfu
title: 089063

description: Magnetars form a small group of isolated X-ray pulsars powered by the dissipation of their magnetic energy. The physical mechanism powering their activity is currently poorly understood. It is in particular debated whether the long-term evolution of their outbursts is due to the cooling of the stellar crust and/or the untwisting of complex magnetic field structures in the magnetosphere. We propose joint observations with NuSTAR and XMM-Newton of the latest discovered magnetar in outburst SGR 1830-0645 to map the thermal structures on its surface test the model predictions for magnetar outbursts and gain insights into the physics of magnetars. emission. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hkigfkz
title: 088176

description: 3C286 is one of only 5 gamma-ray detected CSS and spectroscopically classified as NLS1 galaxy. It is thus a good laboratory for studying the disk-jet connection. But our analysis of the previous few X-ray observations has raised a puzzle: a single unabsorbed powerlaw with index 2 well fits the data but is either inconsistent with the fact that 3C286 has a DLA with 2E+21 cm^-2 or with the jet model for its SED. Thus we propose for an observation to obtain for the first time ever a high S/N spectrum aiming at measuring the absorption and searching for the expected spectral break. Equally important safely confirming previous evidence for variability would question its radio-calibrator status if the variability can be traced back to the jet. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-101908
title: Horses -- Race -- Hollywood Park, 1958

description: 18 images. Horses -- Race -- Hollywood Park, 20 June 1958. Silky Sullivan. 35 mm. "Sports". Sleeve reads: SP 12375).
DOI: 10.57780/esa-hlwjpr7
title: 088489

description: The hyperluminous off-center X-ray source 3XMM J215022.4-055108 is the only known off-center tidal disruption event (TDE) harbouring one of the most solid intermediate mass black hole (IMBH) candidates. We request XMM-Newton to continue the long-term monitoring of this unique object in AO20 for 60 ks. The goals are (1) to test whether accreting massive black holes (BHs) exhibit similar spectral states as seen in accreting stellar-mass BHs and (2) to test whether its luminosity continues to follow the standard t^-5/3 decay for TDEs. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-hnkh14a
title: 089201

description: As we build towards robustly detecting and characterizing the atmospheres of terrestrial exoplanets with JWST we cannot forget to take a close look at the low-mass stars they orbit. Complete coverage of M dwarf ultraviolet spectra are needed to determine the photochemical production rates of molecular species in terrestrial planet atmospheres which will alert us to when disequilibrium chemistry a sign of surface processes or even life is present. High-energy spectra from the UV to X-ray are also needed to calculate mass loss rates from planetary atmospheres which can explain the lack of atmospheres around highly-irradiated terrestrial worlds. LTT 1445Ab and GJ 486b are two of the most spectroscopically accessible terrestrial exoplanets. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-i1q16zn
title: 089400

description: Deep good-seeing HAWK-I Ks images complemented with g+z photometry provide a cost-effective and similarly sensitive alternative to HST for deep weak lensing measurements of massive high-redshift clusters. We propose such observations for the nine z and amp amp amp gt 0.7 clusters with the strongest SZ signal in the new 2770 deg^2 SPTpol Extended Cluster Survey aiming to map their dark matter content and obtain accurate estimates of their true mass scale. [truncated! Please see actual data for full text]
DOI: 10.57780/esa-ibduv5o
title: 089041

description: The high-energy emission of AGNs is mostly studied in nearby Seyferts. Bright QSOs on the other hand offer the opportunity to study accretion processes and AGN-driven winds in the less explored high luminosity regime. We propose a joint NuSTAR and XMM (100 ks) observation of HE 1029-1401 the most X-ray luminous AGN among local (z and amp amp amp lt 0.1) unobscured radio-quiet QSOs and a very intriguing source showing a significant soft excess and a broad iron line. The unique joint capabilities of NuSTAR and XMM will allow us to constrain the properties of the X-ray corona to assess the contribution of relativistic reflection and to determine the nature of the soft excess. We will also be able to search for X-ray winds such as warm absorbers and more powerful ultra-fast outflows. [truncated! Please see actual data for full text]
DOI: 10.25549/examiner-c44-18508
title: University of Southern California swimmers -- divers, 1949

description: 16 images. University of Southern California swimmers -- divers, 15 March 1949. Tom Hairabedian, Wally Wolf; Bob King (back stroke).
DOI: 10.57780/esa-injlfmi
title: 088407

description: The growth of supermassive black holes (1e6 - 1e9 Msun) already observed at redshift as early as z  and amp amp amp gt  7 is an open question that may have deep implications for the formation and evolution of their host galaxies. This growth is likely to involve lighter mass black hole (BH) seeds the so-called intermediate mass BH (IMBH 1e3 - 1e5 Msun). However their existence is still elusive. Hyper Luminous extragalactic and off-nuclear X-ray sources (HLX) with LX  and amp amp amp gt  1e41 erg/s appear as good candidates to harbour IMBH but just a few of them are known. We request two XMM-Newton observations to follow two HLX candidates in NGC 5917  NGC 3583 recently identified from the 2SXPS Swift-XRT catalogue and never observed by XMM-Newton in order to constrain their spectral properties. [truncated! Please see actual data for full text]