{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:OYJLR6AJVGXBVBKRDN6JBF5MA5","short_pith_number":"pith:OYJLR6AJ","canonical_record":{"source":{"id":"0911.1088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T18:00:27Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"74d2134d114a50fa327e2cc87d55e22d251e4210cfb645921d921cd8f42443f6","abstract_canon_sha256":"f1f486b53c1b54bbd46e6fdd1fbe1effdc137a02515aca1aa9cfe2cf4d184214"},"schema_version":"1.0"},"canonical_sha256":"7612b8f809a9ae1a85511b7c9097ac07405dfddd4a60c89ce56d2500b1bf33f2","source":{"kind":"arxiv","id":"0911.1088","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1088","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1088v2","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1088","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"OYJLR6AJVGXB","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OYJLR6AJVGXBVBKR","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OYJLR6AJ","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:OYJLR6AJVGXBVBKRDN6JBF5MA5","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T18:00:27Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"74d2134d114a50fa327e2cc87d55e22d251e4210cfb645921d921cd8f42443f6","abstract_canon_sha256":"f1f486b53c1b54bbd46e6fdd1fbe1effdc137a02515aca1aa9cfe2cf4d184214"},"schema_version":"1.0"},"canonical_sha256":"7612b8f809a9ae1a85511b7c9097ac07405dfddd4a60c89ce56d2500b1bf33f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:24.197746Z","signature_b64":"FQ5g1Qd89jO12HhwovFi/hQ+X2OYWScw0UkKYyr5u0dzt2UxrW6NLfHHMyRG68oQOqv5+0rFEGtRSmOmEgD8Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7612b8f809a9ae1a85511b7c9097ac07405dfddd4a60c89ce56d2500b1bf33f2","last_reissued_at":"2026-05-18T01:09:24.197187Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:24.197187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1088","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wsNlxG8XOKjdFedunx+D2oDQTX+KFY83WTljSMJDotByv4zLrOq90UxCHssFLBb7WZdhZlkHevZn9aFpKakxDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-28T20:38:27.390225Z"},"content_sha256":"5ef84c0460d71b3a6a553933b127a5c2a98b5abc660ebd269abd97a42afafe18","schema_version":"1.0","event_id":"sha256:5ef84c0460d71b3a6a553933b127a5c2a98b5abc660ebd269abd97a42afafe18"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:OYJLR6AJVGXBVBKRDN6JBF5MA5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"1), (10) Tuorla Observatory, (11) Deutsches Elektronen-Synchrotron (DESY), 12), (12) Max-Planck-Institut f\\\"ur Physik, (13) Universit\\`a di Siena, (14) Universitat de Barcelona (ICC/IEEC), (15) Universit\\\"at W\\\"urzburg, 16), (16) Depto. de Astrofisica, (17) Universit\\`a di Udine, 18), (18) Institut de Ci\\`encies de l'Espai (IEEC-CSIC), (19) Inst. de Astrof\\'isica de Andaluc\\'ia (CSIC), (20) Croatian MAGIC Consortium, (21) University of California, (22) Inst. for Nucl. Research, 23), (23) INAF/Osservatorio Astronomico, (24) ICREA, (25) Universit\\`a di Pisa, 26), (26) supported by INFN Padova, 27), (27) now at: Centro de Investigaciones Energ\\'eticas, 28), (28) now at: Max-Planck-Institut f\\\"ur Kernphysik, 29), (29) deceased, (2) ETH Zurich, (30) INAF/IASF-Bologna, (31) INAF/IASF-Roma, (32) INAF, (33) INAF, (34) INAF, (35) University of Perugia, (36) University of Insubria, (37) INAF, 383762 Abastumani, (38) Abastumani Astrophysical Observatory, 39), (39) now at: Scuola Normale Superiore, (3) INAF National Institute for Astrophysics, (4) Universidad Complutense, (5) Technische Universit\\\"at Dortmund, (6) Universitat Aut\\`onoma de Barcelona, 7), (7) Universit\\`a di Padova, (8) Inst. de Astrof\\'isica de Canarias, 9), (9) University of \\L\\'od\\'z, A. Berdyugin (10), A. Biland (2), A. Carosi (3), A. De Angelis (17), A. Dom\\'inguez (19), A. Herrero (8, A. La Barbera (3), A. Laille (21), A. Moralejo (1), A. Saggion (7), A. Sierpowska-Bartosik (9), A. Sillanp\\\"a\\\"a (10), A. Stamerra (13), Astronomical Obs. Brera, Astronomical Obs. Torino, A. Treves (36), B. De Lotto (17), BG-1784 Sofia, B. Steinke (12), Bulgaria, CA-95616-8677, Campus UAB, C. Baixeras (6), C. C. Hsu (12), C. Delgado Mendez (8, CH-8093 Switzerland, C. M. Raiteri (34), Croatia, D-15738 Zeuthen, D-44221 Dortmund, D-69029 Heidelberg, D-80805 M\\\"unchen, D-97074 W\\\"urzburg, Davis, D. Bastieri (7), D. Borla Tridon (12), D. Bose (4), D. Britzger (12), D. Dominis Prester (20), D. Dorner (2), D. Elsaesser (15), D. Ferenc (21), D. F. Torres (24, D. Fugazza (32), D. Hadasch (18), D. Hildebrand (2), D. H\\\"ohne-M\\\"onch (15), D. Hrupec (20), D. Kranich (2), D. Mazin (1), D. Nieto (4), D. Pascoli (7), D. Sobczynska (9), D. Tescaro (1), E-08010 Barcelona, E-08028 Barcelona, E-08193 Bellaterra, E-18080 Granada, E-28040 Madrid, E-38200 La Laguna, E-38206 La Laguna, E. Bernardini (11), E. Carmona (12), E. De Cea del Pozo (18), Edifici Cn., E. Fern\\'andez (1), E. Leonardo (13), E. Lindfors (10), E. Lorenz (2, E. Pian (33, E. Prandini (7), F. D'Ammando (31), F. Dazzi (17, F. De Sabata (17), F. Goebel (12, FI-21500 Piikki\\\"o, Finland, F. Longo (17), F. Pauss (2), F. Prada (19), F. Spanier (15), F. Tavecchio (3), F. Zandanel (19), G. Bonnoli (13), G. Di Cocco (30), Georgia, Germany, G. Ghisellini (32), G. Maneva (22), G. Tosti (35), H. Anderhub (2), H. Miyamoto (12), HR-10000 Zagreb, H. Vankov (22), I-00133 Roma, I-00136 Rome, I-06123 Perugia, I-10025 Torino, I-20133 Milano, I-22100 Como, I-23807 Merate, I-33100 Udine, I-34143 Trieste, I-35131 Padova, I-40129 Bologna, I-53100 Siena, I-56126 Pisa, IASF-Milano, I. Braun (2), INFN, INFN Pisa, INFN Trieste, Institute R. Boskovic, I. Oya (4), I. Puljak (20), I. Reichardt (1), Italy, Italy), J. A. Barrio (4), J. Becerra Gonz\\'alez (8), J. Cortina (1), J. C. Struebig (15), J. Hose (12), J. K. Becker (5), J. L. Contreras (4), J. M. Miranda (4), J. Mold\\'on (14), J. M. Paredes (14), J. Ninkovic (12), J. Rico (24, J. Sitarek (12, J. Zapatero (6), K. Berger (9), K. Mannheim (15), K. Nilsson (10), K. Satalecka (11), L. A. Antonelli (3), L. Font (6), L. Maraschi (3), L. Peruzzo (7), L. Takalo (10), Madrid, MAGIC Collaboration: J. Aleksi\\'c (1), M. A. Perez-Torres (19), M. Backes (5), M. Camara (4), M. De Maria (17), M. Doro (7), Medioambientales y Tecnol\\'ogicas (CIEMAT), M. Errando (1), M. Garczarczyk (1), M. Gaug (8), M. L\\'opez (7), M. Mariotti (7), M. Mart\\'inez (1), M. Meucci (13), M. Moles (19), M. Pasanen (10), M. Persic (17, M. Rib\\'o (14), M. Rissi (2), M. Salvati (3), M. S\\'anchez-Conde (19), M. Shayduk (12), M. T. Costado (8, M. Teshima (12), M. V. Fonseca (4), M. Villata (34) ((1) IFAE, N. Galante (12), N. Godinovic (20), N. Mankuzhiyil (17), N. Puchades (1), N. Strah (5), N. Turini (13), Nucl. Energy, O. M. Kurtanidze (38), P. Antoranz (4), P. Bordas (14), P. Colin (12), PL-90236 Lodz, P. Majumdar (11), Poland, P. Temnikov (22), R. De los Reyes (4, R. Firpo (1), R. G. Pegna (13), R. J. Garc\\'ia L\\'opez (8, R. K. Bock (12, R. Mirzoyan (12), R. M. Wagner (12), R. Orito (12), R. Paoletti (13), R. Zanin (1), S. Balestra (4), S. Commichau (2), S. Covino (3), S. Klepser (1), S. Lombardi (7), S. N. Shore (25), Spain, S. R\\\"ugamer (15), S. Spiro (3), S. Vercellone (37), T. Bretz (15), Tenerife, T. Jogler (12), T. Kr\\\"ahenb\\\"uhl (2), Trieste Astronomical Observatory, T. Schweizer (12), T. Suric (20), T. Y. Saito (12), Universidad, University of Rijeka, University of Split, University of Turku, USA, V. Bianchin (30), V. Bosch-Ramon (14), V. Scalzotto (7), V. Scapin (17), V. Zabalza (14), W. Bednarek (9), W. Rhode (5)","submitted_at":"2009-11-05T18:00:27Z","abstract_excerpt":"The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) gamma-ray, and very-high-energy (VHE) gamma-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. This is the first simultaneous broad-band (i.e., HE+VHE) gamma-ray observation, though AGILE did not detect the source. We combine dat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1088","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"km9+v/ZYiNU5Hmtb55Ow2uBPpK1K6bdxvikw/6SkbaG/3yRXiLBzf3Vix0Ub0RfLLqPVASLDczDn9AYzdc/2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-28T20:38:27.390636Z"},"content_sha256":"c167f8be7826baabcc712a2d245443604f865646cedf359c7ca38ee337a9d011","schema_version":"1.0","event_id":"sha256:c167f8be7826baabcc712a2d245443604f865646cedf359c7ca38ee337a9d011"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/bundle.json","state_url":"https://pith.science/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-28T20:38:27Z","links":{"resolver":"https://pith.science/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5","bundle":"https://pith.science/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/bundle.json","state":"https://pith.science/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OYJLR6AJVGXBVBKRDN6JBF5MA5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:OYJLR6AJVGXBVBKRDN6JBF5MA5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f1f486b53c1b54bbd46e6fdd1fbe1effdc137a02515aca1aa9cfe2cf4d184214","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T18:00:27Z","title_canon_sha256":"74d2134d114a50fa327e2cc87d55e22d251e4210cfb645921d921cd8f42443f6"},"schema_version":"1.0","source":{"id":"0911.1088","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1088","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1088v2","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1088","created_at":"2026-05-18T01:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"OYJLR6AJVGXB","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"OYJLR6AJVGXBVBKR","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"OYJLR6AJ","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:c167f8be7826baabcc712a2d245443604f865646cedf359c7ca38ee337a9d011","target":"graph","created_at":"2026-05-18T01:09:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) gamma-ray, and very-high-energy (VHE) gamma-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. This is the first simultaneous broad-band (i.e., HE+VHE) gamma-ray observation, though AGILE did not detect the source. We combine dat","authors_text":"1), (10) Tuorla Observatory, (11) Deutsches Elektronen-Synchrotron (DESY), 12), (12) Max-Planck-Institut f\\\"ur Physik, (13) Universit\\`a di Siena, (14) Universitat de Barcelona (ICC/IEEC), (15) Universit\\\"at W\\\"urzburg, 16), (16) Depto. de Astrofisica, (17) Universit\\`a di Udine, 18), (18) Institut de Ci\\`encies de l'Espai (IEEC-CSIC), (19) Inst. de Astrof\\'isica de Andaluc\\'ia (CSIC), (20) Croatian MAGIC Consortium, (21) University of California, (22) Inst. for Nucl. Research, 23), (23) INAF/Osservatorio Astronomico, (24) ICREA, (25) Universit\\`a di Pisa, 26), (26) supported by INFN Padova, 27), (27) now at: Centro de Investigaciones Energ\\'eticas, 28), (28) now at: Max-Planck-Institut f\\\"ur Kernphysik, 29), (29) deceased, (2) ETH Zurich, (30) INAF/IASF-Bologna, (31) INAF/IASF-Roma, (32) INAF, (33) INAF, (34) INAF, (35) University of Perugia, (36) University of Insubria, (37) INAF, 383762 Abastumani, (38) Abastumani Astrophysical Observatory, 39), (39) now at: Scuola Normale Superiore, (3) INAF National Institute for Astrophysics, (4) Universidad Complutense, (5) Technische Universit\\\"at Dortmund, (6) Universitat Aut\\`onoma de Barcelona, 7), (7) Universit\\`a di Padova, (8) Inst. de Astrof\\'isica de Canarias, 9), (9) University of \\L\\'od\\'z, A. Berdyugin (10), A. Biland (2), A. Carosi (3), A. De Angelis (17), A. Dom\\'inguez (19), A. Herrero (8, A. La Barbera (3), A. Laille (21), A. Moralejo (1), A. Saggion (7), A. Sierpowska-Bartosik (9), A. Sillanp\\\"a\\\"a (10), A. Stamerra (13), Astronomical Obs. Brera, Astronomical Obs. Torino, A. Treves (36), B. De Lotto (17), BG-1784 Sofia, B. Steinke (12), Bulgaria, CA-95616-8677, Campus UAB, C. Baixeras (6), C. C. Hsu (12), C. Delgado Mendez (8, CH-8093 Switzerland, C. M. Raiteri (34), Croatia, D-15738 Zeuthen, D-44221 Dortmund, D-69029 Heidelberg, D-80805 M\\\"unchen, D-97074 W\\\"urzburg, Davis, D. Bastieri (7), D. Borla Tridon (12), D. Bose (4), D. Britzger (12), D. Dominis Prester (20), D. Dorner (2), D. Elsaesser (15), D. Ferenc (21), D. F. Torres (24, D. Fugazza (32), D. Hadasch (18), D. Hildebrand (2), D. H\\\"ohne-M\\\"onch (15), D. Hrupec (20), D. Kranich (2), D. Mazin (1), D. Nieto (4), D. Pascoli (7), D. Sobczynska (9), D. Tescaro (1), E-08010 Barcelona, E-08028 Barcelona, E-08193 Bellaterra, E-18080 Granada, E-28040 Madrid, E-38200 La Laguna, E-38206 La Laguna, E. Bernardini (11), E. Carmona (12), E. De Cea del Pozo (18), Edifici Cn., E. Fern\\'andez (1), E. Leonardo (13), E. Lindfors (10), E. Lorenz (2, E. Pian (33, E. Prandini (7), F. D'Ammando (31), F. Dazzi (17, F. De Sabata (17), F. Goebel (12, FI-21500 Piikki\\\"o, Finland, F. Longo (17), F. Pauss (2), F. Prada (19), F. Spanier (15), F. Tavecchio (3), F. Zandanel (19), G. Bonnoli (13), G. Di Cocco (30), Georgia, Germany, G. Ghisellini (32), G. Maneva (22), G. Tosti (35), H. Anderhub (2), H. Miyamoto (12), HR-10000 Zagreb, H. Vankov (22), I-00133 Roma, I-00136 Rome, I-06123 Perugia, I-10025 Torino, I-20133 Milano, I-22100 Como, I-23807 Merate, I-33100 Udine, I-34143 Trieste, I-35131 Padova, I-40129 Bologna, I-53100 Siena, I-56126 Pisa, IASF-Milano, I. Braun (2), INFN, INFN Pisa, INFN Trieste, Institute R. Boskovic, I. Oya (4), I. Puljak (20), I. Reichardt (1), Italy, Italy), J. A. Barrio (4), J. Becerra Gonz\\'alez (8), J. Cortina (1), J. C. Struebig (15), J. Hose (12), J. K. Becker (5), J. L. Contreras (4), J. M. Miranda (4), J. Mold\\'on (14), J. M. Paredes (14), J. Ninkovic (12), J. Rico (24, J. Sitarek (12, J. Zapatero (6), K. Berger (9), K. Mannheim (15), K. Nilsson (10), K. Satalecka (11), L. A. Antonelli (3), L. Font (6), L. Maraschi (3), L. Peruzzo (7), L. Takalo (10), Madrid, MAGIC Collaboration: J. Aleksi\\'c (1), M. A. Perez-Torres (19), M. Backes (5), M. Camara (4), M. De Maria (17), M. Doro (7), Medioambientales y Tecnol\\'ogicas (CIEMAT), M. Errando (1), M. Garczarczyk (1), M. Gaug (8), M. L\\'opez (7), M. Mariotti (7), M. Mart\\'inez (1), M. Meucci (13), M. Moles (19), M. Pasanen (10), M. Persic (17, M. Rib\\'o (14), M. Rissi (2), M. Salvati (3), M. S\\'anchez-Conde (19), M. Shayduk (12), M. T. Costado (8, M. Teshima (12), M. V. Fonseca (4), M. Villata (34) ((1) IFAE, N. Galante (12), N. Godinovic (20), N. Mankuzhiyil (17), N. Puchades (1), N. Strah (5), N. Turini (13), Nucl. Energy, O. M. Kurtanidze (38), P. Antoranz (4), P. Bordas (14), P. Colin (12), PL-90236 Lodz, P. Majumdar (11), Poland, P. Temnikov (22), R. De los Reyes (4, R. Firpo (1), R. G. Pegna (13), R. J. Garc\\'ia L\\'opez (8, R. K. Bock (12, R. Mirzoyan (12), R. M. Wagner (12), R. Orito (12), R. Paoletti (13), R. Zanin (1), S. Balestra (4), S. Commichau (2), S. Covino (3), S. Klepser (1), S. Lombardi (7), S. N. Shore (25), Spain, S. R\\\"ugamer (15), S. Spiro (3), S. Vercellone (37), T. Bretz (15), Tenerife, T. Jogler (12), T. Kr\\\"ahenb\\\"uhl (2), Trieste Astronomical Observatory, T. Schweizer (12), T. Suric (20), T. Y. Saito (12), Universidad, University of Rijeka, University of Split, University of Turku, USA, V. Bianchin (30), V. Bosch-Ramon (14), V. Scalzotto (7), V. Scapin (17), V. Zabalza (14), W. Bednarek (9), W. Rhode (5)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T18:00:27Z","title":"Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1088","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5ef84c0460d71b3a6a553933b127a5c2a98b5abc660ebd269abd97a42afafe18","target":"record","created_at":"2026-05-18T01:09:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f1f486b53c1b54bbd46e6fdd1fbe1effdc137a02515aca1aa9cfe2cf4d184214","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-05T18:00:27Z","title_canon_sha256":"74d2134d114a50fa327e2cc87d55e22d251e4210cfb645921d921cd8f42443f6"},"schema_version":"1.0","source":{"id":"0911.1088","kind":"arxiv","version":2}},"canonical_sha256":"7612b8f809a9ae1a85511b7c9097ac07405dfddd4a60c89ce56d2500b1bf33f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7612b8f809a9ae1a85511b7c9097ac07405dfddd4a60c89ce56d2500b1bf33f2","first_computed_at":"2026-05-18T01:09:24.197187Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:24.197187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FQ5g1Qd89jO12HhwovFi/hQ+X2OYWScw0UkKYyr5u0dzt2UxrW6NLfHHMyRG68oQOqv5+0rFEGtRSmOmEgD8Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:24.197746Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1088","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ef84c0460d71b3a6a553933b127a5c2a98b5abc660ebd269abd97a42afafe18","sha256:c167f8be7826baabcc712a2d245443604f865646cedf359c7ca38ee337a9d011"],"state_sha256":"73c6cab80b914153b274285e030947edf0f8fb300dbe9ffc771882f4ec4ea2c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+L0xD/n2GEKTYgfMzXFKcOVp7YoMsfseb3xKTJGCLQ8QKnHkixS9p+PwJ5kL9iaWJEJ/oFFwHybW1wjbA26ACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-28T20:38:27.392870Z","bundle_sha256":"74a56627730809c2ee83455a410638204ec905309b778dd12cde264098445409"}}