{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:Z5H7DKFSMRC2S7BQVNN35ERS2M","short_pith_number":"pith:Z5H7DKFS","schema_version":"1.0","canonical_sha256":"cf4ff1a8b26445a97c30ab5bbe9232d32dc932c8ab98a83403db2f712b9fc600","source":{"kind":"arxiv","id":"0710.2464","version":1},"attestation_state":"computed","paper":{"title":"The 26 year-long X-ray light curve and the X-ray spectrum of the BL Lac Object 1E 1207.9+3945 in its brightest state","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Maselli, A. Tramacere, F. Massaro, M. Capalbi, M. Perri, P. Giommi, R. Nesci","submitted_at":"2007-10-12T14:04:04Z","abstract_excerpt":"We studied the temporal and spectral evolution of the synchrotron emission from the high energy peaked BL Lac object 1E 1207.9+3945. Two recent observations have been performed by the XMM-Newton and Swift satellites; we carried out X-ray spectral analysis for both of them, and photometry in optical-ultraviolet filters for the Swift one. Combining the results thus obtained with archival data we built the long-term X-ray light curve, spanning a time interval of 26 years, and the Spectral Energy Distribution (SED) of this source. The light curve shows a large flux increasing, about a factor of si"},"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":"0710.2464","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-12T14:04:04Z","cross_cats_sorted":[],"title_canon_sha256":"3ed87d2918822fd54abcaeb6232b0d5bbaecd2c8c5ef556d174e2d62b46d8035","abstract_canon_sha256":"2629b57d7ada473716b109526c280f5d48b3d6db2690fb9d84ba23582f53e307"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:06:14.123084Z","signature_b64":"SO/qceHvedCQgr3kqFPExSeK/bSaYYKCwSqUYnpgMnd1R4gC8Lhgxk70m8LqOvtr8DwUDA/iYhj1A+Aytm3cAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf4ff1a8b26445a97c30ab5bbe9232d32dc932c8ab98a83403db2f712b9fc600","last_reissued_at":"2026-07-04T17:06:14.122663Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:06:14.122663Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The 26 year-long X-ray light curve and the X-ray spectrum of the BL Lac Object 1E 1207.9+3945 in its brightest state","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Maselli, A. Tramacere, F. Massaro, M. Capalbi, M. Perri, P. Giommi, R. Nesci","submitted_at":"2007-10-12T14:04:04Z","abstract_excerpt":"We studied the temporal and spectral evolution of the synchrotron emission from the high energy peaked BL Lac object 1E 1207.9+3945. Two recent observations have been performed by the XMM-Newton and Swift satellites; we carried out X-ray spectral analysis for both of them, and photometry in optical-ultraviolet filters for the Swift one. Combining the results thus obtained with archival data we built the long-term X-ray light curve, spanning a time interval of 26 years, and the Spectral Energy Distribution (SED) of this source. The light curve shows a large flux increasing, about a factor of si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.2464","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0710.2464/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"0710.2464","created_at":"2026-07-04T17:06:14.122722+00:00"},{"alias_kind":"arxiv_version","alias_value":"0710.2464v1","created_at":"2026-07-04T17:06:14.122722+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.2464","created_at":"2026-07-04T17:06:14.122722+00:00"},{"alias_kind":"pith_short_12","alias_value":"Z5H7DKFSMRC2","created_at":"2026-07-04T17:06:14.122722+00:00"},{"alias_kind":"pith_short_16","alias_value":"Z5H7DKFSMRC2S7BQ","created_at":"2026-07-04T17:06:14.122722+00:00"},{"alias_kind":"pith_short_8","alias_value":"Z5H7DKFS","created_at":"2026-07-04T17:06:14.122722+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M","json":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M.json","graph_json":"https://pith.science/api/pith-number/Z5H7DKFSMRC2S7BQVNN35ERS2M/graph.json","events_json":"https://pith.science/api/pith-number/Z5H7DKFSMRC2S7BQVNN35ERS2M/events.json","paper":"https://pith.science/paper/Z5H7DKFS"},"agent_actions":{"view_html":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M","download_json":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M.json","view_paper":"https://pith.science/paper/Z5H7DKFS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0710.2464&json=true","fetch_graph":"https://pith.science/api/pith-number/Z5H7DKFSMRC2S7BQVNN35ERS2M/graph.json","fetch_events":"https://pith.science/api/pith-number/Z5H7DKFSMRC2S7BQVNN35ERS2M/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M/action/storage_attestation","attest_author":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M/action/author_attestation","sign_citation":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M/action/citation_signature","submit_replication":"https://pith.science/pith/Z5H7DKFSMRC2S7BQVNN35ERS2M/action/replication_record"}},"created_at":"2026-07-04T17:06:14.122722+00:00","updated_at":"2026-07-04T17:06:14.122722+00:00"}