{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:TPWSGG4EULLQQYT6ITOY6PTTC3","short_pith_number":"pith:TPWSGG4E","schema_version":"1.0","canonical_sha256":"9bed231b84a2d708627e44dd8f3e7316d090d682a3397fe740e952292526e44b","source":{"kind":"arxiv","id":"1209.2877","version":2},"attestation_state":"computed","paper":{"title":"A compact steep spectrum radio source in NGC1977","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"Charlottesville, Charlottesville), D. Anish Roshi (NRAO, Green Bank), Scott M. Ransom (NRAO","submitted_at":"2012-09-13T12:57:23Z","abstract_excerpt":"A compact steep spectrum radio source (J0535-0452) is located in the sky coincident with a bright optical rim in the HII region NGC1977. J0535-0452 is observed to be $\\leq 100$ mas in angular size at 8.44 GHz. The spectrum for the radio source is steep and straight with a spectral index of -1.3 between 330 and 8440 MHz. No 2 \\mu m IR counter part for the source is detected. These characteristics indicate that the source may be either a rare high redshift radio galaxy or a millisecond pulsar (MSP). Here we investigate whether the steep spectrum source is a millisecond pulsar.The optical rim is "},"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":"1209.2877","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-13T12:57:23Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"22e550dba898353f914517c6f9f00be6b1e7263b72c41327a2c736283c53c247","abstract_canon_sha256":"a93a74fc081aa2a4ff5f82d27cc65be169ccd86efdaacbf20ee89d5990fcc20e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:45:32.990328Z","signature_b64":"Uq0gT/V8Tfyi6FhgVZ4enLRZXgojDmlpoK5UHtaHadE+S8bBDB2+KmarsngG8RwMzRZDVANqoz0ubnMelXL8Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bed231b84a2d708627e44dd8f3e7316d090d682a3397fe740e952292526e44b","last_reissued_at":"2026-05-18T03:45:32.989751Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:45:32.989751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A compact steep spectrum radio source in NGC1977","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"Charlottesville, Charlottesville), D. Anish Roshi (NRAO, Green Bank), Scott M. Ransom (NRAO","submitted_at":"2012-09-13T12:57:23Z","abstract_excerpt":"A compact steep spectrum radio source (J0535-0452) is located in the sky coincident with a bright optical rim in the HII region NGC1977. J0535-0452 is observed to be $\\leq 100$ mas in angular size at 8.44 GHz. The spectrum for the radio source is steep and straight with a spectral index of -1.3 between 330 and 8440 MHz. No 2 \\mu m IR counter part for the source is detected. These characteristics indicate that the source may be either a rare high redshift radio galaxy or a millisecond pulsar (MSP). Here we investigate whether the steep spectrum source is a millisecond pulsar.The optical rim is "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.2877","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1209.2877","created_at":"2026-05-18T03:45:32.989860+00:00"},{"alias_kind":"arxiv_version","alias_value":"1209.2877v2","created_at":"2026-05-18T03:45:32.989860+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.2877","created_at":"2026-05-18T03:45:32.989860+00:00"},{"alias_kind":"pith_short_12","alias_value":"TPWSGG4EULLQ","created_at":"2026-05-18T12:27:23.164592+00:00"},{"alias_kind":"pith_short_16","alias_value":"TPWSGG4EULLQQYT6","created_at":"2026-05-18T12:27:23.164592+00:00"},{"alias_kind":"pith_short_8","alias_value":"TPWSGG4E","created_at":"2026-05-18T12:27:23.164592+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/TPWSGG4EULLQQYT6ITOY6PTTC3","json":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3.json","graph_json":"https://pith.science/api/pith-number/TPWSGG4EULLQQYT6ITOY6PTTC3/graph.json","events_json":"https://pith.science/api/pith-number/TPWSGG4EULLQQYT6ITOY6PTTC3/events.json","paper":"https://pith.science/paper/TPWSGG4E"},"agent_actions":{"view_html":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3","download_json":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3.json","view_paper":"https://pith.science/paper/TPWSGG4E","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1209.2877&json=true","fetch_graph":"https://pith.science/api/pith-number/TPWSGG4EULLQQYT6ITOY6PTTC3/graph.json","fetch_events":"https://pith.science/api/pith-number/TPWSGG4EULLQQYT6ITOY6PTTC3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3/action/storage_attestation","attest_author":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3/action/author_attestation","sign_citation":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3/action/citation_signature","submit_replication":"https://pith.science/pith/TPWSGG4EULLQQYT6ITOY6PTTC3/action/replication_record"}},"created_at":"2026-05-18T03:45:32.989860+00:00","updated_at":"2026-05-18T03:45:32.989860+00:00"}