{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:2ERG4SGQSYQB5U5M7M3JTSYPQ7","short_pith_number":"pith:2ERG4SGQ","canonical_record":{"source":{"id":"1004.1093","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-04-07T13:59:33Z","cross_cats_sorted":[],"title_canon_sha256":"d0551091db157696cfe9bb3cc7d49265555c58c55c8a2e5af4ab889f6e580018","abstract_canon_sha256":"bdbf9b91d278258f6ed9048fadeb377181d7e4a7ce93610a6775f9bd33ba4723"},"schema_version":"1.0"},"canonical_sha256":"d1226e48d096201ed3acfb3699cb0f87fbee44a37db971782db94a808815f3eb","source":{"kind":"arxiv","id":"1004.1093","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.1093","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"arxiv_version","alias_value":"1004.1093v2","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.1093","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"pith_short_12","alias_value":"2ERG4SGQSYQB","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2ERG4SGQSYQB5U5M","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2ERG4SGQ","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:2ERG4SGQSYQB5U5M7M3JTSYPQ7","target":"record","payload":{"canonical_record":{"source":{"id":"1004.1093","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-04-07T13:59:33Z","cross_cats_sorted":[],"title_canon_sha256":"d0551091db157696cfe9bb3cc7d49265555c58c55c8a2e5af4ab889f6e580018","abstract_canon_sha256":"bdbf9b91d278258f6ed9048fadeb377181d7e4a7ce93610a6775f9bd33ba4723"},"schema_version":"1.0"},"canonical_sha256":"d1226e48d096201ed3acfb3699cb0f87fbee44a37db971782db94a808815f3eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:08.467677Z","signature_b64":"FugzcQM54vTdUu310Tc4lieRzN+8dEhVCSlPwppvG7fY8Xlf9ZYaz3MgyVKtHp/b1omSonHj82rkml5piZ7LBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1226e48d096201ed3acfb3699cb0f87fbee44a37db971782db94a808815f3eb","last_reissued_at":"2026-05-18T02:08:08.467024Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:08.467024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.1093","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":"2026-05-18T02:08:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g9EBU6RojMNLXIB3vHWlyWThQ/l9vTS9EajOjc70ywDtkc2CYCnxvfQULErKVQZ7JGJH8wOvMIEy9dD8Q3M8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T09:37:21.547829Z"},"content_sha256":"5bc37f4fd56fbeea7b6594b40b935ed988f69e66c9e48a0b48b4293d5e921066","schema_version":"1.0","event_id":"sha256:5bc37f4fd56fbeea7b6594b40b935ed988f69e66c9e48a0b48b4293d5e921066"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:2ERG4SGQSYQB5U5M7M3JTSYPQ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for an extended VHE gamma-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Berdyugin, A. Biland, A. Carosi, A. De Angelis, A. Dom\\'inguez, A. Herrero, A. La Barbera, A. Laille, A. Moralejo, A. Neronov, A. Saggion, A. Sierpowska-Bartosik, A. Sillanp\\\"a\\\"a, A. Stamerra, B. De Lotto, B. Steinke, C. Baixeras, C. C. Hsu, C. Delgado Mendez, C. Schultz, D. Bastieri, D. Borla Tridon, D. Bose, D. Britzger, D. Dominis Prester, D. Dorner, D. Elsaesser, D. Ferenc, D. F. Torres, D. Hadasch, D. Hildebrand, D. H\\\"ohne-M\\\"onch, D. Hrupec, D. Kranich, D. Mazin, D. Nieto, D. Pascoli, D. Sobczynska, D. Tescaro, D. V. Semikoz, E. Bernardini, E. Carmona, E. de Cea del Pozo, E. Leonardo, E. Lindfors, E. Lorenz, E. Prandini, F. Dazzi, F. De Sabata, F. Longo, F. Pauss, F. Prada, F. Spanier, F. Tavecchio, F. Zandanel, G. Bonnoli, G. Maneva, H. Miyamoto, H. Vankov, I. Braun, I. Oya, I. Puljak, I. Reichardt, J. A. Barrio, J. Becerra Gonz\\'alez, J. Cortina, J. C. Struebig, J. Hose, J. L. Contreras, J. M. Miranda, J. Mold\\'on, J. M. Paredes, J. Ninkovic, J. Rico, J. Sitarek, K. Berger, K. Mannheim, K. Nilsson, K. Satalecka, L. A. Antonelli, L. Font, L. Maraschi, L. Peruzzo, L. Takalo, MAGIC Collaboration: J. Aleksi\\'c, M. A. Perez-Torres, M. Backes, M. Camara, M. De Maria, M. Doert, M. Doro, M. Errando, M. Garczarczyk, M. Gaug, M. L\\'opez, M. Mariotti, M. Mart\\'inez, M. Meucci, M. Moles, M. Pasanen, M. Persic, M. Rib\\'o, M. Rissi, M. Salvati, M. S\\'anchez-Conde, M. Shayduk, M. T. Costado, M. Teshima, M. V. Fonseca, N. Godinovic, N. Mankuzhiyil, N. Puchades, O. Blanch, P. Antoranz, P. Bordas, P. Colin, P. Majumdar, P. Temnikov, Q. Weitzel, R. de los Reyes, R. G. Pegna, R. J. Garc\\'ia L\\'opez, R. K. Bock, R. Mirzoyan, R. M. Wagner, R. Orito, R. Paoletti, R. Zanin, S. Commichau, S. Covino, S. Klepser, S. Lombardi, S. N. Shore, S. Paiano, S. Partini, S. R\\\"ugamer, S. Spiro, T. Bretz, T. Jogler, T. Kr\\\"ahenb\\\"uhl, T. Schweizer, T. Suric, T. Terzic, T. Y. Saito, V. Bosch-Ramon, V. Scalzotto, V. Scapin, V. Zabalza, W. Bednarek, W. Rhode","submitted_at":"2010-04-07T13:59:33Z","abstract_excerpt":"Context: Part of the very high energy $\\gamma$-ray radiation coming from extragalactic sources is absorbed through the pair production process on the extragalactic background light photons. Extragalactic magnetic fields alter the trajectories of these cascade pairs and, in turn, convert cosmic background photons to gamma-ray energies by inverse Compton scattering. These secondary photons can form an extended halo around bright VHE sources.\n  Aims: We searched for an extended emission around the bright blazars Mrk 421 and Mrk 501 using the MAGIC telescope data.\n  Methods: If extended emission i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.1093","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":"2026-05-18T02:08:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5AKcRXSur0HcLSun7kceMRBDFPthxihbOzxx5mMGnjnAsnHt/NKOng4ZcGZWHlo2o2QkLJWXUdm7guyE7BJsCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T09:37:21.548210Z"},"content_sha256":"38de0ada87ef5177623ede251ab854711d429b4de1f8113a31fdb3755f6ae5c1","schema_version":"1.0","event_id":"sha256:38de0ada87ef5177623ede251ab854711d429b4de1f8113a31fdb3755f6ae5c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/bundle.json","state_url":"https://pith.science/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/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":"2026-05-20T09:37:21Z","links":{"resolver":"https://pith.science/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7","bundle":"https://pith.science/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/bundle.json","state":"https://pith.science/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2ERG4SGQSYQB5U5M7M3JTSYPQ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:2ERG4SGQSYQB5U5M7M3JTSYPQ7","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":"bdbf9b91d278258f6ed9048fadeb377181d7e4a7ce93610a6775f9bd33ba4723","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-04-07T13:59:33Z","title_canon_sha256":"d0551091db157696cfe9bb3cc7d49265555c58c55c8a2e5af4ab889f6e580018"},"schema_version":"1.0","source":{"id":"1004.1093","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.1093","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"arxiv_version","alias_value":"1004.1093v2","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.1093","created_at":"2026-05-18T02:08:08Z"},{"alias_kind":"pith_short_12","alias_value":"2ERG4SGQSYQB","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2ERG4SGQSYQB5U5M","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2ERG4SGQ","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:38de0ada87ef5177623ede251ab854711d429b4de1f8113a31fdb3755f6ae5c1","target":"graph","created_at":"2026-05-18T02:08:08Z","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":"Context: Part of the very high energy $\\gamma$-ray radiation coming from extragalactic sources is absorbed through the pair production process on the extragalactic background light photons. Extragalactic magnetic fields alter the trajectories of these cascade pairs and, in turn, convert cosmic background photons to gamma-ray energies by inverse Compton scattering. These secondary photons can form an extended halo around bright VHE sources.\n  Aims: We searched for an extended emission around the bright blazars Mrk 421 and Mrk 501 using the MAGIC telescope data.\n  Methods: If extended emission i","authors_text":"A. Berdyugin, A. Biland, A. Carosi, A. De Angelis, A. Dom\\'inguez, A. Herrero, A. La Barbera, A. Laille, A. Moralejo, A. Neronov, A. Saggion, A. Sierpowska-Bartosik, A. Sillanp\\\"a\\\"a, A. Stamerra, B. De Lotto, B. Steinke, C. Baixeras, C. C. Hsu, C. Delgado Mendez, C. Schultz, D. Bastieri, D. Borla Tridon, D. Bose, D. Britzger, D. Dominis Prester, D. Dorner, D. Elsaesser, D. Ferenc, D. F. Torres, D. Hadasch, D. Hildebrand, D. H\\\"ohne-M\\\"onch, D. Hrupec, D. Kranich, D. Mazin, D. Nieto, D. Pascoli, D. Sobczynska, D. Tescaro, D. V. Semikoz, E. Bernardini, E. Carmona, E. de Cea del Pozo, E. Leonardo, E. Lindfors, E. Lorenz, E. Prandini, F. Dazzi, F. De Sabata, F. Longo, F. Pauss, F. Prada, F. Spanier, F. Tavecchio, F. Zandanel, G. Bonnoli, G. Maneva, H. Miyamoto, H. Vankov, I. Braun, I. Oya, I. Puljak, I. Reichardt, J. A. Barrio, J. Becerra Gonz\\'alez, J. Cortina, J. C. Struebig, J. Hose, J. L. Contreras, J. M. Miranda, J. Mold\\'on, J. M. Paredes, J. Ninkovic, J. Rico, J. Sitarek, K. Berger, K. Mannheim, K. Nilsson, K. Satalecka, L. A. Antonelli, L. Font, L. Maraschi, L. Peruzzo, L. Takalo, MAGIC Collaboration: J. Aleksi\\'c, M. A. Perez-Torres, M. Backes, M. Camara, M. De Maria, M. Doert, M. Doro, M. Errando, M. Garczarczyk, M. Gaug, M. L\\'opez, M. Mariotti, M. Mart\\'inez, M. Meucci, M. Moles, M. Pasanen, M. Persic, M. Rib\\'o, M. Rissi, M. Salvati, M. S\\'anchez-Conde, M. Shayduk, M. T. Costado, M. Teshima, M. V. Fonseca, N. Godinovic, N. Mankuzhiyil, N. Puchades, O. Blanch, P. Antoranz, P. Bordas, P. Colin, P. Majumdar, P. Temnikov, Q. Weitzel, R. de los Reyes, R. G. Pegna, R. J. Garc\\'ia L\\'opez, R. K. Bock, R. Mirzoyan, R. M. Wagner, R. Orito, R. Paoletti, R. Zanin, S. Commichau, S. Covino, S. Klepser, S. Lombardi, S. N. Shore, S. Paiano, S. Partini, S. R\\\"ugamer, S. Spiro, T. Bretz, T. Jogler, T. Kr\\\"ahenb\\\"uhl, T. Schweizer, T. Suric, T. Terzic, T. Y. Saito, V. Bosch-Ramon, V. Scalzotto, V. Scapin, V. Zabalza, W. Bednarek, W. Rhode","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-04-07T13:59:33Z","title":"Search for an extended VHE gamma-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.1093","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":"sha256:5bc37f4fd56fbeea7b6594b40b935ed988f69e66c9e48a0b48b4293d5e921066","target":"record","created_at":"2026-05-18T02:08:08Z","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":"bdbf9b91d278258f6ed9048fadeb377181d7e4a7ce93610a6775f9bd33ba4723","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-04-07T13:59:33Z","title_canon_sha256":"d0551091db157696cfe9bb3cc7d49265555c58c55c8a2e5af4ab889f6e580018"},"schema_version":"1.0","source":{"id":"1004.1093","kind":"arxiv","version":2}},"canonical_sha256":"d1226e48d096201ed3acfb3699cb0f87fbee44a37db971782db94a808815f3eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1226e48d096201ed3acfb3699cb0f87fbee44a37db971782db94a808815f3eb","first_computed_at":"2026-05-18T02:08:08.467024Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:08.467024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FugzcQM54vTdUu310Tc4lieRzN+8dEhVCSlPwppvG7fY8Xlf9ZYaz3MgyVKtHp/b1omSonHj82rkml5piZ7LBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:08.467677Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.1093","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bc37f4fd56fbeea7b6594b40b935ed988f69e66c9e48a0b48b4293d5e921066","sha256:38de0ada87ef5177623ede251ab854711d429b4de1f8113a31fdb3755f6ae5c1"],"state_sha256":"41fc0c101196a8b943ca8b840ae580ecca612114db8f71bdec427d7b8924a196"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t+VHXR+JePRh5ZvXirqxmGbFrdtW7+3qDX2qGijC2Xdm3eN3BKFDa7XHfrSHsi7aPT+TjNVQ+gE9dzUabRR6Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T09:37:21.550523Z","bundle_sha256":"def8c698d9f2ea8c60128ff1a7ce688ad37de810706f67195b638be9a9c9ae57"}}