{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:NS5R5BBHN37ZK752XSXHEENCCR","short_pith_number":"pith:NS5R5BBH","schema_version":"1.0","canonical_sha256":"6cbb1e84276eff957fbabcae7211a214791c8ab84279c961d1eb50057ea7110b","source":{"kind":"arxiv","id":"0907.4982","version":1},"attestation_state":"computed","paper":{"title":"Spectroscopy of the bright optical counterparts of X-ray sources in the direction of M 31. II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"1) ((1) University of Crete, 2), (2) IESL, (3) Max-Planck-Institut fur extraterrestrische Physik), Despina Hatzidimitriou (1, Foundation for Research, Paolo Bonfini (1), Physics Department, P. Reig (2, Technology, Wolfgang Pietsch (3)","submitted_at":"2009-07-28T20:00:05Z","abstract_excerpt":"A recent survey of the Local Group spiral galaxy M 31 with XMM-Newton yielded a large number of X-ray sources. This is the second in a series of papers with the aim of identifying the optical counterparts of these X-ray sources. We have obtained optical spectra for 21 bright optical counterparts of 20 X-ray sources in the direction of M 31, using the 1.3-m Skinakas telescope in Crete, Greece. For 17 of the 20 X-ray sources, we have identified the optical counterpart as a normal late type star (of type F or later) in the foreground (i.e. in the Milky Way). For two more sources there were two po"},"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":"0907.4982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-07-28T20:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"d09bac6242170855dda6f8bf02df6d0b796bf5174c324fea2d3130633c406bca","abstract_canon_sha256":"5e7dec96c164aa81e5b726c8b2154d485ae056c9be180eedc35508ebcffff3dd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:46.942557Z","signature_b64":"oQXTtOOZJJWqQY6rQOIEFrpKC3wMmn7YJ7IUZCuU47I3VjG69c2ohSvUOnAFMpxOsyrJz+L3ttNDBLFHO0PoAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cbb1e84276eff957fbabcae7211a214791c8ab84279c961d1eb50057ea7110b","last_reissued_at":"2026-05-18T02:12:46.941821Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:46.941821Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spectroscopy of the bright optical counterparts of X-ray sources in the direction of M 31. II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"1) ((1) University of Crete, 2), (2) IESL, (3) Max-Planck-Institut fur extraterrestrische Physik), Despina Hatzidimitriou (1, Foundation for Research, Paolo Bonfini (1), Physics Department, P. Reig (2, Technology, Wolfgang Pietsch (3)","submitted_at":"2009-07-28T20:00:05Z","abstract_excerpt":"A recent survey of the Local Group spiral galaxy M 31 with XMM-Newton yielded a large number of X-ray sources. This is the second in a series of papers with the aim of identifying the optical counterparts of these X-ray sources. We have obtained optical spectra for 21 bright optical counterparts of 20 X-ray sources in the direction of M 31, using the 1.3-m Skinakas telescope in Crete, Greece. For 17 of the 20 X-ray sources, we have identified the optical counterpart as a normal late type star (of type F or later) in the foreground (i.e. in the Milky Way). For two more sources there were two po"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4982","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":""},"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":"0907.4982","created_at":"2026-05-18T02:12:46.941928+00:00"},{"alias_kind":"arxiv_version","alias_value":"0907.4982v1","created_at":"2026-05-18T02:12:46.941928+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4982","created_at":"2026-05-18T02:12:46.941928+00:00"},{"alias_kind":"pith_short_12","alias_value":"NS5R5BBHN37Z","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"NS5R5BBHN37ZK752","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"NS5R5BBH","created_at":"2026-05-18T12:26:00.592388+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/NS5R5BBHN37ZK752XSXHEENCCR","json":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR.json","graph_json":"https://pith.science/api/pith-number/NS5R5BBHN37ZK752XSXHEENCCR/graph.json","events_json":"https://pith.science/api/pith-number/NS5R5BBHN37ZK752XSXHEENCCR/events.json","paper":"https://pith.science/paper/NS5R5BBH"},"agent_actions":{"view_html":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR","download_json":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR.json","view_paper":"https://pith.science/paper/NS5R5BBH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0907.4982&json=true","fetch_graph":"https://pith.science/api/pith-number/NS5R5BBHN37ZK752XSXHEENCCR/graph.json","fetch_events":"https://pith.science/api/pith-number/NS5R5BBHN37ZK752XSXHEENCCR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR/action/storage_attestation","attest_author":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR/action/author_attestation","sign_citation":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR/action/citation_signature","submit_replication":"https://pith.science/pith/NS5R5BBHN37ZK752XSXHEENCCR/action/replication_record"}},"created_at":"2026-05-18T02:12:46.941928+00:00","updated_at":"2026-05-18T02:12:46.941928+00:00"}