Search results for "Sky"
showing 10 items of 1603 documents
A survey of active galaxies at TeV photon energies with the HAWC gamma-ray observatory
2020
The High Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) continuously detects TeV photons and particles within its large field-of-view, accumulating every day a deeper exposure of two thirds of the sky. We analyzed 1523~days of HAWC live data acquired over four and a half years, in a follow-up analysis of {138} nearby ($z<0.3$) active galactic nuclei from the {\em Fermi} 3FHL catalog culminating within $40^\circ$ of the zenith at Sierra Negra, the HAWC site. This search for persistent TeV emission used a maximum-likelihood analysis assuming intrinsic power-law spectra attenuated by pair production of gamma-ray photons with the extragalactic background light. HAWC clearly detects persi…
Finding a 61.0-day orbital period for the HMXB 4U 1036-56 with the Swift-BAT monitoring
2013
Since November 2004, the Burst Alert Telescope on board Swift is producing a monitoring of the entire sky in the 15-150 keV band, recording the timing and spectral behavior of the detected sources. Here we study the properties of the HMXB 4U 1036-56 using both the BAT survey data and those from a Swift-XRT observation. A folding analysis performed on the BAT light curve of the first 100 months of survey unveils a periodic modulation with a period of 61.0 days, tied to the presence in the BAT light curve of several intensity enhancements lasting ~1/4 of P_0. We explain this modulation as the orbital period of the binary system. The position of 4U 1036-56 on the Corbet diagram, the derived se…
The Swift-BAT survey reveals the orbital period of three high-mass X-ray binaries
2011
A growing number of previously hidden Galactic X-ray sources are now detected with recent surveys performed by the Integral and Swift satellites. Most of these new sources eluded past surveys due to their large local X-ray extinction and consequent low soft X-ray flux. The Swift-BAT performs daily monitoring of the sky in an energy band (15-150 keV) which is only marginally affected by X-ray extinction, thus allowing for the search of long periodicities in the light curve and identification of the nature of the X-ray sources. We performed a period search using the folding technique in the Swift-BAT light curves of three Integral sources: IGR J05007-7047, IGR J13186-6257 and IGR J17354-3255.…
Pinch technique and the Batalin-Vilkovisky formalism
2002
In this paper we take the first step towards a non-diagrammatic formulation of the Pinch Technique. In particular we proceed into a systematic identification of the parts of the one-loop and two-loop Feynman diagrams that are exchanged during the pinching process in terms of unphysical ghost Green's functions; the latter appear in the standard Slavnov-Taylor identity satisfied by the tree-level and one-loop three-gluon vertex. This identification allows for the consistent generalization of the intrinsic pinch technique to two loops, through the collective treatment of entire sets of diagrams, instead of the laborious algebraic manipulation of individual graphs, and sets up the stage for the…
Silver-Russell syndrome associated to Mayer-Rokitansky-Kuster-Hauser syndrome, diabetes and hirsutism
2001
We report an unusual association of two rare conditions, the Silver-Russell syndrome and the Mayer-Rokitansky-Küster-Hauser syndrome, with extra endocrine anomalies. A 15-year old Silver-Russell syndrome girl was referred to our Unit because of primary amenorrhea and hirsutism of adrenal origin. A thorough assessment confirmed previous diagnoses and revealed the presence of diabetes, hyperinsulinism and a complete Mayer-Rokitansky-Küster-Hauser syndrome with an ectopic localization of both ovaries. Although initial medical treatment was not unsatisfactory, future medical, psychological and social implications are expected.
De Carthage à la Shoah : tragédie de l’histoire, dignité du théâtre chez René Kalisky
2019
« Peu de gens devineront combien il a fallu être triste pour entreprendre de ressusciter Carthage. »Flaubert. Sur les ruines de Carthage est une pièce de René Kalisky écrite à Berlin en 1979, et dont l’action se situe en 2146 dans une contrée non définie. Au commencement, il y a « sur toute la surface de jeu, des rayonnages de livres, d’archives [...] à plusieurs niveaux », un réchaud à gaz, un évier, un lit et du linge sale en désordre. Koschitzke, historien spécialiste de Carthage,...
Religious thought and experience in the prison camps
2020
The development of religious thought has often been marked by discord and conflicts be tween religions (and/or individual religious thinkers) and the State, which at times led to the repression of individuals and or groups of people united by the same confession. The Russian case is fully in line with this unfortunate tradition: from Nikon’s schism to the re pression against all religions under the Soviet regime, Russian religious thought has of ten developed in repressive conditions. However, the Russian case has one distinguishing feature, that is, the extensive use of prison camps by Russian and Soviet authorities from the nineteenth century onwards, which has had a direct effect on some…
Anne Truelove e Baba the Turk: immagini del femminile in The Rake's Progress (1947-51) di Igor Stravinsky
2018
Il saggio ricostruisce la genesi di "The Rake's Progress" (La carriera di un libertino, 1947-51) di Igor Stravinsky, anche in relazione all'omonima serie di quadri e incisioni di William Hogarth e soffermandosi sulla contrapposizione rappresentativa e di linguaggio musicale che caratterizza i due personaggi femminili di Anne Truelove e Baba the Turk.
Liikkujien määrän mittaamisessa tarvitaan monia menetelmiä
2023
Liikuntatieteen ja maantieteen osaamista yhdistäneestä Yhdenvertainen liikunnallinen lähiö (YLLI) -hankkeessa kertyi tietoa Helsingin Kontulan ja Jyväskylän Huhtasuon liikuntapaikkojen käytöstä ja käyttäjistä. Samalla karttui kokemuksia eri mittausmenetelmistä. Käyttöä on niin laskureille, havainnoinnille, somedatalle kuin kyselyille. nonPeerReviewed
Liikkumisen esteiden poistaminen vie kohti yhdenvertaisuutta
2023
Väestön liikkumisen lisäämiseksi on keskityttävä esteiden poistamiseen. Liikuntamahdollisuuksien saavutettavuudessa ei ole kyse yksinomaan liikuntapaikkojen tarjonnasta. nonPeerReviewed