{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:WTFZI4QKP42OMGQKWNIBAKP2QU","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":"9bd981c0aaf365bfba24baadc7cb20490fec238ba4dcc32c8ee95099dd19bb52","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-22T23:28:28Z","title_canon_sha256":"71e6089fc53da28fa6b065eb4897d851cdaf086fb633422ee328fe2cec9153e2"},"schema_version":"1.0","source":{"id":"1308.5017","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.5017","created_at":"2026-05-18T03:11:32Z"},{"alias_kind":"arxiv_version","alias_value":"1308.5017v1","created_at":"2026-05-18T03:11:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.5017","created_at":"2026-05-18T03:11:32Z"},{"alias_kind":"pith_short_12","alias_value":"WTFZI4QKP42O","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"WTFZI4QKP42OMGQK","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"WTFZI4QK","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:01d951dd7e78812c768c1c694235feae17d4f6e966246d41a5a4f629f6354848","target":"graph","created_at":"2026-05-18T03:11:32Z","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":"We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov telescope array. These observations were motivated by the discovery of a cluster of >30GeV photons in the first year of Fermi-LAT observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of 1.93 +/- 0.13_stat +/- 0.78_sys 10^-11 cm-2 s-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux correspondi","authors_text":"A. Bouvier, A. B. Pushkarev, A. Cesarini, A. Falcone, A. Furniss, A. McCann, A. N. Otte, A. O'Faolain de Bhroithe, A. Popkow, A. S Madhavan, A. Varlotta, A. Weinstein, A. W. Smith, B. Zitzer, D. A. Williams, D. B. Saxon, D. Gall, D. Hanna, D. Kieda, D. Staszak, E. Roache, F. Krennrich, G. Gyuk, G. H. Gillanders, G. H. Sembroski, G. Hughes, G. Maier, G. T. Richards, H. Krawczynski, H. Prokoph, I. Telezhinsky, J. Grube, J. H. Buckley, J. Holder, J. Liu, J. Millis, J. P. Finley, J. P. Halpern, J. Quinn, J. S. Perkins, K. Byrum, K. Ragan, L. Ciupik, L. C. Reyes, L. Fortson, M. Beilicke, M. Bottcher, M. Errando, M. J. Lang, M. Kertzman, M. L. Lister, M. P. Connolly, M. Pohl, M. Theiling, N. Galante, N. Park, P. Fortin, P. Kaaret, P. Majumdar, P. Moriarty, P. S. Smith, P. T. Reynolds, Q. Feng, R. A. Ong, R. Bird, R. Mukherjee, R. Welsing, S. Federici, S. Griffin, S. J. Fegan, S. Kumar, S. McArthur, S. P. Wakely, S. Vincent, T. Arlen, T. Aune, T. B. Humensky, T. C. Weekes, V. Bugaev, VERITAS Collaboration: S. Archambault, V. V. Vassiliev, W. Benbow, W. Cui, Y. Khassen, Y. Y. Kovalev","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-22T23:28:28Z","title":"Discovery of a new TeV gamma-ray source: VER J0521+211"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.5017","kind":"arxiv","version":1},"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":"sha256:532c0c747a0cff6f7dfe2c9d91de27083b4b874f1f655c5836e93dfc0e0af966","target":"record","created_at":"2026-05-18T03:11:32Z","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":"9bd981c0aaf365bfba24baadc7cb20490fec238ba4dcc32c8ee95099dd19bb52","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-22T23:28:28Z","title_canon_sha256":"71e6089fc53da28fa6b065eb4897d851cdaf086fb633422ee328fe2cec9153e2"},"schema_version":"1.0","source":{"id":"1308.5017","kind":"arxiv","version":1}},"canonical_sha256":"b4cb94720a7f34e61a0ab3501029fa8505fee1c17bde15e75028e859d13a56f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4cb94720a7f34e61a0ab3501029fa8505fee1c17bde15e75028e859d13a56f1","first_computed_at":"2026-05-18T03:11:32.916310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:11:32.916310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yowAM4CKQGZAsQOdJq84RpHibDu0ghcJeDv5F4/LrGW/GiIczlYSvW2QTbtY8lm2IpAIL215Gp0UAXGNCQ3BBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:11:32.917197Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.5017","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:532c0c747a0cff6f7dfe2c9d91de27083b4b874f1f655c5836e93dfc0e0af966","sha256:01d951dd7e78812c768c1c694235feae17d4f6e966246d41a5a4f629f6354848"],"state_sha256":"f934c083e877ef2e19550325b24249f7c9b9d2fce8f7e9a6e0815bb640e556d0"}