{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:VC2SGHPL2OCWI6B4D64ZZMEJX4","short_pith_number":"pith:VC2SGHPL","schema_version":"1.0","canonical_sha256":"a8b5231debd38564783c1fb99cb089bf3f978126901e444a41640f0f8832c51b","source":{"kind":"arxiv","id":"1512.04435","version":3},"attestation_state":"computed","paper":{"title":"Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"02540 Kylm\\\"al\\\"a, (10) Deutsches Elektronen-Synchrotron (DESY), (11) IFAE, 1216 East California Boulevard, 12489 Berlin Germany, 1290, (12) Universit\\\"at W\\\"urzburg, (13) Centro de Investigaciones Energ\\'eticas, 14), (14) Inst. de Astrof\\'isica de Canarias, 150 - Urca, (15) Universit\\`a di Padova, (16) Institute for Space Sciences (CSIC IEEC), (17) Technische Universit\\\"at Dortmund, (18) Unitat de F\\'isica de les Radiacions, (19) Universitat de Barcelona, 1 AF Bidhannagar, 1 UNF Drive, 20), (20) Japanese MAGIC Consortium, (21) Finnish MAGIC Consortium, 22290-180, (22) Inst. for Nucl. Research, (23) Universit\\`a di Pisa, (24) ICREA, (25) Universit\\`a dell'Insubria, 26), (26) now at Centro Brasileiro de Pesquisas F\\'isicas (CBPF MCTI), 27), (27) Humboldt University of Berlin, 28), (28) now at Ecole polytechnique f\\'ed\\'erale de Lausanne (EPFL), 29), (29) Istituto Nazionale di Fisica Nucleare, (2) Universit\\`a di Udine, 30), (30) now at Laboratoire AIM, 31), (31) now at Finnish Centre for Astronomy with ESO (FINCA), 32), (32) also at INAF-Trieste, (33) Istituto Nazionale di Fisica Nucleare, 34), (34) also at ISDC - Science Data Center for Astrophysics, (35) Department of Physics, (36) Universit\\`a di Pisa, 37), (37) W. W. Hansen Experimental Physics Laboratory, 38), (38) Dipartimento di Fisica, 39), (39) Dipartimento di Fisica e Astronomia \"G. Galilei\", (3) INAF National Institute for Astrophysics, (40) NASA Goddard Space Flight Center, 41, 41), (41) Department of Physics, 42), (42) Istituto Nazionale di Fisica Nucleare, 43), (43) Istituto Nazionale di Fisica Nucleare, 44), (44) Istituto Nazionale di Fisica Nucleare, 45), (45) Dipartimento di Fisica Generale \"Amadeo Avogadro\", (46) Laboratoire Univers et Particules de Montpellier, (47) Laboratoire Leprince-Ringuet, 48, 48), (48) Consorzio Interuniversitario per la Fisica Spaziale (CIFS), (49) INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica, (4) Universit\\`a di Siena, (50) Agenzia Spaziale Italiana (ASI) Science Data Center, 51, 51), (51) Istituto Nazionale di Fisica Nucleare, 52, 52), (52) INAF Osservatorio Astronomico di Roma, (53) INAF Istituto di Radioastronomia, 54), (54) Dipartimento di Astronomia, 55), (55) Universit\\`a Telematica Pegaso, (56) Universit\\`a di Udine, (57) Dipartimento di Fisica \"M. Merlin\" dell'Universit\\`a e del Politecnico di Bari, (58) Laboratoire AIM, 59), (59) NASA Postdoctoral Program Fellow, (5) Croatian MAGIC Consortium, (60) University of North Florida, (61) Department of Physics, 62), (62) The Oskar Klein Centre for Cosmoparticle Physics, (63) Space Science Division, 64), (64) Dipartimento di Fisica, 65, (65) Catholic University of America, 66), (66) University of Maryland, (67) Hiroshima Astrophysical Science Center, (68) Istituto Nazionale di Fisica Nucleare, 69), (69) Funded by contract FIRB-2012-RBFR12PM1F from the Italian Ministry of Education, (6) Saha Institute of Nuclear Physics, (70) Institut f\\\"ur Astro- und Teilchenphysik, (71) NYCB Real-Time Computing Inc., 72000 Puebla, (72) Solar-Terrestrial Environment Laboratory, (73) Department of Physical Sciences, 74), (74) Cahill Center for Astrophysics, (75) Tuorla Observatory, (76) Instituto Nacional de Astrof\\'isica \\'Optica y Electr\\'onica (INAOE), (77) Naturwissenschaftliches Labor f\\\"ur Sch\\\"uler, (78) Aalto University Mets\\\"ahovi Radio Observatory, (79) INAF-Istituto di Astrofisica e Planetologia Spaziale, (7) Max-Planck-Institut f\\\"ur Physik, 80), (80) Aalto University Department of Radio Science, (8) Universidad Complutense, (9) University of \\L\\'od\\'z, A-6020 Innsbruck, A. Antonelli (3), A. Babic (5), A. Berdyugin (75), A. Biland (1), A. Carosi (3), A. Carraminana (76), A. Chatterjee (6), A. De Angelis (15), A. Dom\\'inguez (35), A. Fern\\'andez-Barral (11), A. Gonz\\'alez Mu\\~noz (11), A. Hahn (7), A. La Barbera (3), A. L\\\"ahteenm\\\"aki (78, AlbaNova, A. L\\'opez-Oramas (11, A. Moralejo (11), A. Morselli (68), A. Niedzwiecki (9), A. Overkemping (17), Apartado Postal 51 y 216, A. Porras (76), A. Reimer (70, A. Sillanp\\\"a\\\"a (21), A. Stamerra (3), Astronomy, A. Treves (25), Austria, Baltimore, Baltimore County, B. Banerjee (6), B. Biassuzzi (2), B. De Lotto (2), BG-1784 Sofia, B. Marcote (19), Brazil, Bulgaria, CA 91125, CA 94305, California Institute of Technology, Campus UAB, C. Delgado Mendez (13), CEA-IRFU/CNRS/Universit\\'e Paris Diderot, CEA Saclay, CEA Saclay FR-91191 Gif-sur-Yvette Cedex, CERES-IEEC, C. Fruck (7), CH-8093 Zurich, Clemson, Clemson University, C. Lorey (77) L. Pacciani (79), CNRS/IN2P3, College Park, Como, Cosmology, Croatia, C. Schultz (15), C. Sgr\\`o (42), D-15738 Zeuthen, D-44221 Dortmund, D-80805 M\\\"unchen, D-97074 W\\\"urzburg, D. Bastieri (29, DC 20064, DC 20375-5352, D. Dominis Prester (5), D. Dorner (12), D. Eisenacher Glawion (12), D. Elsaesser (12), Departament de F\\'isica, Department of Astronomy, Department of Physics, D. Fidalgo (8), D. F. Torres (24), D. Galindo (19), D. Garrido Terrats (18), D. Gasparrini (50, D. Guberman (11), D. Hrupec (5), D. J. Thompson (40), D. Lelas (5), D. Mazin (7, D. Nakajima (20), D. Paneque (7), Dpto. Astrof\\'isica, DSM IRFU, D. Sobczynska (9), D. Tescaro (14), D. Wolfert (77), E-08028 Barcelona, E-08193 Barcelona, E-08193 Bellaterra, E-28040 Madrid, E-38200 La Laguna, E-38206 La Laguna, E. Bernardini (10, E. Bissaldi (43), E. Carmona (13), E. Cavazzuti (50), \\'Ecole polytechnique, E. Colombo (14), E. de O\\~na Wilhelmi (16), E. Hays (40), E. J. Siskind (71), E. Lindfors (21), E. Lorenz (7), E. Moretti (7), Engineering, E. Nuss (46), E. Orlando (37), E. Prandini (1, E. Recillas (76), E. Troja (40, F-91191 Gif sur Yvette, F. Borracci (7), F. D'Ammando (53, F. Dazzi (7), F. de Palma (43, F. Di Pierro (3), FERMI-LAT Collaboration: M. Ajello (35), F. Gargano (43), F. Giordano (57, FI-00076 Aalto, Finland, Finland.), FL 32224, F. Longo (33, F. Loparco (57, F. Piron (46), France, Friedrich-Koenig-Gymnasium, F. Spada (42), F. Tavecchio (3), G. A. Caliandro (37, G. Barbiellini (33, G. Bonnoli (3), G. Chiaro (39), Germany, G. Hughes (1), G. Maneva (22), G. Pivato (42), Greenbelt, G. Spandre (42), Hakubi Center, Higashi-Hiroshima, Hiroshima 739-8526, Hiroshima University, H. Kubo (20), H. Tajima (72, H. Takahashi (73), H. Takami (20), I-00040 Monte Porzio Catone (Roma), I-00133 Roma, I-00133 Rome, I-00136 Rome, I-06123 Perugia, I-10125 Torino, I-10133 Torino, I-20133 Milano, I-22100 Como, I-33100 Udine, I-34127 Trieste, I-35131 Padova, I-40127 Bologna, I-40129 Bologna, I-53100 Siena, I-56126 Pisa, I-56127 Pisa, I-70126 Bari, I-80132 Napoli, I. A. Grenier (58), ICC, ICRR, IEEC-UB, India, INFN, INFN Milano Bicocca, INFN Pisa, INFN Trieste, Institute for Space Sciences (CSIC IEEC), Institut f\\\"ur Theoretische Physik, I. Puljak (5), I. Snidaric (5), Istitut f\\\"ur Physik Newtonstr. 15, Istituto Nazionale di Fisica Nucleare, Italy, I. V. Moskalenko (37), I. Vovk (7), J. A. Barrio (8), Jacksonville, Japan, J. Becerra Gonz\\'alez (40, J. Bregeon (46), J. B. Thayer (37), J. Chiang (37), J. Cortina (11), J. E. McEnery (40, J. E. Ward (11), J. Herrera (14), J. Hose (7), J. Kania (77), J. Klamt (77), J. Kushida (20), J. L. Contreras (8), J. Leon-Tavares (76), J. Li (16), J. M. Miranda (4), J. M. Paredes (19), J. Palacio (11), J. Poutanen (21), J. Rico (11), J. Rodriguez Garcia (7), J. Sitarek (9), J. S. Perkins (40), J. Thaele (17), J.W. Hewitt (60), Kavli Institute for Particle Astrophysics, KEK, K. Frantzen (17), Kinard Lab of Physics, K. Kodani (20), K. Mallot (10), K. Mannheim (12), K. Nilsson (21, K. Nishijima (20), K. Noda (7), Kolkata 700064, K. Satalecka (8), K. S. Wood (63), KTH Royal Institute of Technology, Kyoto University, Lattingtown, Lausanne, L. Baldini (36, L. Carrasco (76), L. Di Venere (57), Leopold-Franzens-Universit\\\"at Innsbruck, L. Font (18), L. Li (61, L. Maraschi (3), L. Takalo (21), MAGIC Collaboration: M. L. Ahnen (1), M. Balokovic (74), M. Caragiulo (43), MD 20742, MD 20771, MD 21250, M. Doro (7, Medioambientales y Tecnol\\'ogicas, M. E. Monzani (37), Mets\\\"ahovintie 114, M\\'exico, M. Feige (77), M. Garczarczyk (10), M. Gaug (18), M. Giroletti (53), M. Hayashida (20), M. H. Wu (16), M. Kuss (42), M. L\\'opez (8), M. Makariev (22), M. Manganaro (14), M. Mariotti (15), M. Mart\\'inez (11), M. Mayer (10), M. Nievas Rosillo (8), M. N. Lovellette (63), M. N. Mazziotta (43), Montpellier, M. Palatiello (2), M. Persic (2, M. Pesce-Rollins (42, M. Razzano (42, M. Rib\\'o (19), M. Strzys (7), M. Teshima (7, M. Tornikoski (78), M. V. Fonseca (8), M. Will (14), Nagoya 464-8601, Nagoya University, Naval Research Laboratory, N. Giglietto (57, N. Godinovi\\'c (5), N. Mirabal (40, N. Omodei (37), Nucl. Energy, NY 11560-1025, N. Zottmann (77) ((1) ETH Zurich, O. Blanch (11), O. Reimer (70, P. A. Caraveo (49), Palaiseau, P. Antoranz (4), Pasadena, P. Bangale (7), P. Bruel (47), P. Colin (7), P. Da Vela (4), P. Fusco (57, P. Giammaria (3), P. G. Prada Moroni (23), P. Haeusner (77), Piazza Trieste e Trento, PL-90236 Lodz, P. Lubrano (51, P. Majumdar (6), P.O. BOX 13000, Poland, P. Spinelli (57, P. Temnikov (22), R. A. Cameron (37), R. Bellazzini (42), R. Bonino (44, R. Clavero (14), R. D. Blandford (37), R. Desiante (56, R. Dr. Xavier Sigaud, Research (MIUR), Rio de Janeiro - RJ, R. J. Garc\\'ia L\\'opez (14), R. L\\'opez-Coto (11), R. Mirzoyan (7), R. Ojha (40, R. Orito (20), R. Paoletti (4), R. Rando (29, R. Reinthal (75), Rudjer Boskovic Institute, R. Zanin (19), Salt Lake, S. Ansoldi (2), S. Bonnefoy (8), S. Buson (29, SC 29634-0978, S. Ciprini (50, S. Covino (3), SE-106 91 Stockholm, Sector-1, S. Einecke (17), Service d'Astrophysique, Sezione di Bari, Sezione di Padova, Sezione di Perugia, Sezione di Pisa, Sezione di Pisa I-56127 Pisa, Sezione di Roma \"Tor Vergata\", Sezione di Torino, Sezione di Trieste, S. Guiriec (40, S. Haarto (78), SLAC National Accelerator Laboratory, S. Larsson (61, S. Lombardi (3), S. Maldera (44), S. N. Shore (23), S. Paiano (15), Spain, S. Rain\\`o (57, Stanford, Stanford University, Sweden, Switzerland, T. A. Porter (37), T. Bretz (12, Tenerife, The University of Tokushima, The University of Tokyo, T. Hovatta (78, T. Jogler (37), T. Mizuno (67), T. Ohsugi (67), Tokai University, T. Saito (20), T. Schweizer (7), T. Steinbring (12), T. Terzi\\'c (5), T. Toyama (7), Tuorla Observatory, Turku, U. Barres de Almeida (7, U. Menzel (7), Universidad de La Laguna, Universit\\`a degli Studi di Perugia, Universit\\`a degli Studi di Torino, Universit\\`a di Bologna, Universit\\`a di Padova, Universit\\`a di Trieste, Universitat Aut\\`onoma de Barcelona, Universit\\'e Montpellier, University, University of Maryland, University of Oulu, University of Rijeka, University of Split, University of Turku, University of Zagreb, USA, V. Chavushyan (76), Versoix (Geneva), V. Fallah Ramazani (75), Via Fosso del Cavaliere 100, V. Neustroev (21), V. Verguilov (22), Washington, W. Bednarek (9), W. Idec (9), W. Rhode (17), W\\\"urzburg, X. Paredes-Fortuny (19), Y. Hanabata (20), Y. Konno (20)","submitted_at":"2015-12-14T18:00:46Z","abstract_excerpt":"The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5 {\\sigma} using the MAGIC telescopes. Together with the gravitationally lensed blazar QSO B0218+357 (z = 0.944), PKS 1441+25 is the most distant very high energy (VHE) blazar detected to date. The observations were triggered by an outburst in 2015 April seen at GeV energies with the Large Area Telescope on board Fermi. Multi-wavelength observations suggest a subdivision of the high state into two distinct flux states. In the band covered by MAGIC, the variability "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1512.04435","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-12-14T18:00:46Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"7a4052538292b0888b4cc28bfbf1d57384d4a00c0ceebb8c9ccc02481f61b6d2","abstract_canon_sha256":"0b822d3151a895fbc8ca14468efc119f149abcc6e0da789c1c64b4474dcad595"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:08.959658Z","signature_b64":"qbOdnYhBrX19jVnkcNOahOENrxWzF6AJr3mjrMtwYdfc5wqurI8z2cGo4eFy0EMZ9l6SHta1B+nz4bFgWfjVBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8b5231debd38564783c1fb99cb089bf3f978126901e444a41640f0f8832c51b","last_reissued_at":"2026-05-18T00:26:08.959050Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:08.959050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"02540 Kylm\\\"al\\\"a, (10) Deutsches Elektronen-Synchrotron (DESY), (11) IFAE, 1216 East California Boulevard, 12489 Berlin Germany, 1290, (12) Universit\\\"at W\\\"urzburg, (13) Centro de Investigaciones Energ\\'eticas, 14), (14) Inst. de Astrof\\'isica de Canarias, 150 - Urca, (15) Universit\\`a di Padova, (16) Institute for Space Sciences (CSIC IEEC), (17) Technische Universit\\\"at Dortmund, (18) Unitat de F\\'isica de les Radiacions, (19) Universitat de Barcelona, 1 AF Bidhannagar, 1 UNF Drive, 20), (20) Japanese MAGIC Consortium, (21) Finnish MAGIC Consortium, 22290-180, (22) Inst. for Nucl. Research, (23) Universit\\`a di Pisa, (24) ICREA, (25) Universit\\`a dell'Insubria, 26), (26) now at Centro Brasileiro de Pesquisas F\\'isicas (CBPF MCTI), 27), (27) Humboldt University of Berlin, 28), (28) now at Ecole polytechnique f\\'ed\\'erale de Lausanne (EPFL), 29), (29) Istituto Nazionale di Fisica Nucleare, (2) Universit\\`a di Udine, 30), (30) now at Laboratoire AIM, 31), (31) now at Finnish Centre for Astronomy with ESO (FINCA), 32), (32) also at INAF-Trieste, (33) Istituto Nazionale di Fisica Nucleare, 34), (34) also at ISDC - Science Data Center for Astrophysics, (35) Department of Physics, (36) Universit\\`a di Pisa, 37), (37) W. W. Hansen Experimental Physics Laboratory, 38), (38) Dipartimento di Fisica, 39), (39) Dipartimento di Fisica e Astronomia \"G. Galilei\", (3) INAF National Institute for Astrophysics, (40) NASA Goddard Space Flight Center, 41, 41), (41) Department of Physics, 42), (42) Istituto Nazionale di Fisica Nucleare, 43), (43) Istituto Nazionale di Fisica Nucleare, 44), (44) Istituto Nazionale di Fisica Nucleare, 45), (45) Dipartimento di Fisica Generale \"Amadeo Avogadro\", (46) Laboratoire Univers et Particules de Montpellier, (47) Laboratoire Leprince-Ringuet, 48, 48), (48) Consorzio Interuniversitario per la Fisica Spaziale (CIFS), (49) INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica, (4) Universit\\`a di Siena, (50) Agenzia Spaziale Italiana (ASI) Science Data Center, 51, 51), (51) Istituto Nazionale di Fisica Nucleare, 52, 52), (52) INAF Osservatorio Astronomico di Roma, (53) INAF Istituto di Radioastronomia, 54), (54) Dipartimento di Astronomia, 55), (55) Universit\\`a Telematica Pegaso, (56) Universit\\`a di Udine, (57) Dipartimento di Fisica \"M. Merlin\" dell'Universit\\`a e del Politecnico di Bari, (58) Laboratoire AIM, 59), (59) NASA Postdoctoral Program Fellow, (5) Croatian MAGIC Consortium, (60) University of North Florida, (61) Department of Physics, 62), (62) The Oskar Klein Centre for Cosmoparticle Physics, (63) Space Science Division, 64), (64) Dipartimento di Fisica, 65, (65) Catholic University of America, 66), (66) University of Maryland, (67) Hiroshima Astrophysical Science Center, (68) Istituto Nazionale di Fisica Nucleare, 69), (69) Funded by contract FIRB-2012-RBFR12PM1F from the Italian Ministry of Education, (6) Saha Institute of Nuclear Physics, (70) Institut f\\\"ur Astro- und Teilchenphysik, (71) NYCB Real-Time Computing Inc., 72000 Puebla, (72) Solar-Terrestrial Environment Laboratory, (73) Department of Physical Sciences, 74), (74) Cahill Center for Astrophysics, (75) Tuorla Observatory, (76) Instituto Nacional de Astrof\\'isica \\'Optica y Electr\\'onica (INAOE), (77) Naturwissenschaftliches Labor f\\\"ur Sch\\\"uler, (78) Aalto University Mets\\\"ahovi Radio Observatory, (79) INAF-Istituto di Astrofisica e Planetologia Spaziale, (7) Max-Planck-Institut f\\\"ur Physik, 80), (80) Aalto University Department of Radio Science, (8) Universidad Complutense, (9) University of \\L\\'od\\'z, A-6020 Innsbruck, A. Antonelli (3), A. Babic (5), A. Berdyugin (75), A. Biland (1), A. Carosi (3), A. Carraminana (76), A. Chatterjee (6), A. De Angelis (15), A. Dom\\'inguez (35), A. Fern\\'andez-Barral (11), A. Gonz\\'alez Mu\\~noz (11), A. Hahn (7), A. La Barbera (3), A. L\\\"ahteenm\\\"aki (78, AlbaNova, A. L\\'opez-Oramas (11, A. Moralejo (11), A. Morselli (68), A. Niedzwiecki (9), A. Overkemping (17), Apartado Postal 51 y 216, A. Porras (76), A. Reimer (70, A. Sillanp\\\"a\\\"a (21), A. Stamerra (3), Astronomy, A. Treves (25), Austria, Baltimore, Baltimore County, B. Banerjee (6), B. Biassuzzi (2), B. De Lotto (2), BG-1784 Sofia, B. Marcote (19), Brazil, Bulgaria, CA 91125, CA 94305, California Institute of Technology, Campus UAB, C. Delgado Mendez (13), CEA-IRFU/CNRS/Universit\\'e Paris Diderot, CEA Saclay, CEA Saclay FR-91191 Gif-sur-Yvette Cedex, CERES-IEEC, C. Fruck (7), CH-8093 Zurich, Clemson, Clemson University, C. Lorey (77) L. Pacciani (79), CNRS/IN2P3, College Park, Como, Cosmology, Croatia, C. Schultz (15), C. Sgr\\`o (42), D-15738 Zeuthen, D-44221 Dortmund, D-80805 M\\\"unchen, D-97074 W\\\"urzburg, D. Bastieri (29, DC 20064, DC 20375-5352, D. Dominis Prester (5), D. Dorner (12), D. Eisenacher Glawion (12), D. Elsaesser (12), Departament de F\\'isica, Department of Astronomy, Department of Physics, D. Fidalgo (8), D. F. Torres (24), D. Galindo (19), D. Garrido Terrats (18), D. Gasparrini (50, D. Guberman (11), D. Hrupec (5), D. J. Thompson (40), D. Lelas (5), D. Mazin (7, D. Nakajima (20), D. Paneque (7), Dpto. Astrof\\'isica, DSM IRFU, D. Sobczynska (9), D. Tescaro (14), D. Wolfert (77), E-08028 Barcelona, E-08193 Barcelona, E-08193 Bellaterra, E-28040 Madrid, E-38200 La Laguna, E-38206 La Laguna, E. Bernardini (10, E. Bissaldi (43), E. Carmona (13), E. Cavazzuti (50), \\'Ecole polytechnique, E. Colombo (14), E. de O\\~na Wilhelmi (16), E. Hays (40), E. J. Siskind (71), E. Lindfors (21), E. Lorenz (7), E. Moretti (7), Engineering, E. Nuss (46), E. Orlando (37), E. Prandini (1, E. Recillas (76), E. Troja (40, F-91191 Gif sur Yvette, F. Borracci (7), F. D'Ammando (53, F. Dazzi (7), F. de Palma (43, F. Di Pierro (3), FERMI-LAT Collaboration: M. Ajello (35), F. Gargano (43), F. Giordano (57, FI-00076 Aalto, Finland, Finland.), FL 32224, F. Longo (33, F. Loparco (57, F. Piron (46), France, Friedrich-Koenig-Gymnasium, F. Spada (42), F. Tavecchio (3), G. A. Caliandro (37, G. Barbiellini (33, G. Bonnoli (3), G. Chiaro (39), Germany, G. Hughes (1), G. Maneva (22), G. Pivato (42), Greenbelt, G. Spandre (42), Hakubi Center, Higashi-Hiroshima, Hiroshima 739-8526, Hiroshima University, H. Kubo (20), H. Tajima (72, H. Takahashi (73), H. Takami (20), I-00040 Monte Porzio Catone (Roma), I-00133 Roma, I-00133 Rome, I-00136 Rome, I-06123 Perugia, I-10125 Torino, I-10133 Torino, I-20133 Milano, I-22100 Como, I-33100 Udine, I-34127 Trieste, I-35131 Padova, I-40127 Bologna, I-40129 Bologna, I-53100 Siena, I-56126 Pisa, I-56127 Pisa, I-70126 Bari, I-80132 Napoli, I. A. Grenier (58), ICC, ICRR, IEEC-UB, India, INFN, INFN Milano Bicocca, INFN Pisa, INFN Trieste, Institute for Space Sciences (CSIC IEEC), Institut f\\\"ur Theoretische Physik, I. Puljak (5), I. Snidaric (5), Istitut f\\\"ur Physik Newtonstr. 15, Istituto Nazionale di Fisica Nucleare, Italy, I. V. Moskalenko (37), I. Vovk (7), J. A. Barrio (8), Jacksonville, Japan, J. Becerra Gonz\\'alez (40, J. Bregeon (46), J. B. Thayer (37), J. Chiang (37), J. Cortina (11), J. E. McEnery (40, J. E. Ward (11), J. Herrera (14), J. Hose (7), J. Kania (77), J. Klamt (77), J. Kushida (20), J. L. Contreras (8), J. Leon-Tavares (76), J. Li (16), J. M. Miranda (4), J. M. Paredes (19), J. Palacio (11), J. Poutanen (21), J. Rico (11), J. Rodriguez Garcia (7), J. Sitarek (9), J. S. Perkins (40), J. Thaele (17), J.W. Hewitt (60), Kavli Institute for Particle Astrophysics, KEK, K. Frantzen (17), Kinard Lab of Physics, K. Kodani (20), K. Mallot (10), K. Mannheim (12), K. Nilsson (21, K. Nishijima (20), K. Noda (7), Kolkata 700064, K. Satalecka (8), K. S. Wood (63), KTH Royal Institute of Technology, Kyoto University, Lattingtown, Lausanne, L. Baldini (36, L. Carrasco (76), L. Di Venere (57), Leopold-Franzens-Universit\\\"at Innsbruck, L. Font (18), L. Li (61, L. Maraschi (3), L. Takalo (21), MAGIC Collaboration: M. L. Ahnen (1), M. Balokovic (74), M. Caragiulo (43), MD 20742, MD 20771, MD 21250, M. Doro (7, Medioambientales y Tecnol\\'ogicas, M. E. Monzani (37), Mets\\\"ahovintie 114, M\\'exico, M. Feige (77), M. Garczarczyk (10), M. Gaug (18), M. Giroletti (53), M. Hayashida (20), M. H. Wu (16), M. Kuss (42), M. L\\'opez (8), M. Makariev (22), M. Manganaro (14), M. Mariotti (15), M. Mart\\'inez (11), M. Mayer (10), M. Nievas Rosillo (8), M. N. Lovellette (63), M. N. Mazziotta (43), Montpellier, M. Palatiello (2), M. Persic (2, M. Pesce-Rollins (42, M. Razzano (42, M. Rib\\'o (19), M. Strzys (7), M. Teshima (7, M. Tornikoski (78), M. V. Fonseca (8), M. Will (14), Nagoya 464-8601, Nagoya University, Naval Research Laboratory, N. Giglietto (57, N. Godinovi\\'c (5), N. Mirabal (40, N. Omodei (37), Nucl. Energy, NY 11560-1025, N. Zottmann (77) ((1) ETH Zurich, O. Blanch (11), O. Reimer (70, P. A. Caraveo (49), Palaiseau, P. Antoranz (4), Pasadena, P. Bangale (7), P. Bruel (47), P. Colin (7), P. Da Vela (4), P. Fusco (57, P. Giammaria (3), P. G. Prada Moroni (23), P. Haeusner (77), Piazza Trieste e Trento, PL-90236 Lodz, P. Lubrano (51, P. Majumdar (6), P.O. BOX 13000, Poland, P. Spinelli (57, P. Temnikov (22), R. A. Cameron (37), R. Bellazzini (42), R. Bonino (44, R. Clavero (14), R. D. Blandford (37), R. Desiante (56, R. Dr. Xavier Sigaud, Research (MIUR), Rio de Janeiro - RJ, R. J. Garc\\'ia L\\'opez (14), R. L\\'opez-Coto (11), R. Mirzoyan (7), R. Ojha (40, R. Orito (20), R. Paoletti (4), R. Rando (29, R. Reinthal (75), Rudjer Boskovic Institute, R. Zanin (19), Salt Lake, S. Ansoldi (2), S. Bonnefoy (8), S. Buson (29, SC 29634-0978, S. Ciprini (50, S. Covino (3), SE-106 91 Stockholm, Sector-1, S. Einecke (17), Service d'Astrophysique, Sezione di Bari, Sezione di Padova, Sezione di Perugia, Sezione di Pisa, Sezione di Pisa I-56127 Pisa, Sezione di Roma \"Tor Vergata\", Sezione di Torino, Sezione di Trieste, S. Guiriec (40, S. Haarto (78), SLAC National Accelerator Laboratory, S. Larsson (61, S. Lombardi (3), S. Maldera (44), S. N. Shore (23), S. Paiano (15), Spain, S. Rain\\`o (57, Stanford, Stanford University, Sweden, Switzerland, T. A. Porter (37), T. Bretz (12, Tenerife, The University of Tokushima, The University of Tokyo, T. Hovatta (78, T. Jogler (37), T. Mizuno (67), T. Ohsugi (67), Tokai University, T. Saito (20), T. Schweizer (7), T. Steinbring (12), T. Terzi\\'c (5), T. Toyama (7), Tuorla Observatory, Turku, U. Barres de Almeida (7, U. Menzel (7), Universidad de La Laguna, Universit\\`a degli Studi di Perugia, Universit\\`a degli Studi di Torino, Universit\\`a di Bologna, Universit\\`a di Padova, Universit\\`a di Trieste, Universitat Aut\\`onoma de Barcelona, Universit\\'e Montpellier, University, University of Maryland, University of Oulu, University of Rijeka, University of Split, University of Turku, University of Zagreb, USA, V. Chavushyan (76), Versoix (Geneva), V. Fallah Ramazani (75), Via Fosso del Cavaliere 100, V. Neustroev (21), V. Verguilov (22), Washington, W. Bednarek (9), W. Idec (9), W. Rhode (17), W\\\"urzburg, X. Paredes-Fortuny (19), Y. Hanabata (20), Y. Konno (20)","submitted_at":"2015-12-14T18:00:46Z","abstract_excerpt":"The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5 {\\sigma} using the MAGIC telescopes. Together with the gravitationally lensed blazar QSO B0218+357 (z = 0.944), PKS 1441+25 is the most distant very high energy (VHE) blazar detected to date. The observations were triggered by an outburst in 2015 April seen at GeV energies with the Large Area Telescope on board Fermi. Multi-wavelength observations suggest a subdivision of the high state into two distinct flux states. In the band covered by MAGIC, the variability "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.04435","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1512.04435","created_at":"2026-05-18T00:26:08.959149+00:00"},{"alias_kind":"arxiv_version","alias_value":"1512.04435v3","created_at":"2026-05-18T00:26:08.959149+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.04435","created_at":"2026-05-18T00:26:08.959149+00:00"},{"alias_kind":"pith_short_12","alias_value":"VC2SGHPL2OCW","created_at":"2026-05-18T12:29:44.643036+00:00"},{"alias_kind":"pith_short_16","alias_value":"VC2SGHPL2OCWI6B4","created_at":"2026-05-18T12:29:44.643036+00:00"},{"alias_kind":"pith_short_8","alias_value":"VC2SGHPL","created_at":"2026-05-18T12:29:44.643036+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2606.28088","citing_title":"A Rare Gamma-ray Flaring episode of the Narrow-Line Seyfert 1 Galaxy 1H 0323+342","ref_index":11,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4","json":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4.json","graph_json":"https://pith.science/api/pith-number/VC2SGHPL2OCWI6B4D64ZZMEJX4/graph.json","events_json":"https://pith.science/api/pith-number/VC2SGHPL2OCWI6B4D64ZZMEJX4/events.json","paper":"https://pith.science/paper/VC2SGHPL"},"agent_actions":{"view_html":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4","download_json":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4.json","view_paper":"https://pith.science/paper/VC2SGHPL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1512.04435&json=true","fetch_graph":"https://pith.science/api/pith-number/VC2SGHPL2OCWI6B4D64ZZMEJX4/graph.json","fetch_events":"https://pith.science/api/pith-number/VC2SGHPL2OCWI6B4D64ZZMEJX4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4/action/storage_attestation","attest_author":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4/action/author_attestation","sign_citation":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4/action/citation_signature","submit_replication":"https://pith.science/pith/VC2SGHPL2OCWI6B4D64ZZMEJX4/action/replication_record"}},"created_at":"2026-05-18T00:26:08.959149+00:00","updated_at":"2026-05-18T00:26:08.959149+00:00"}