{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:HJWIMEVRFRNH6RRVIV6ITWT3O6","short_pith_number":"pith:HJWIMEVR","schema_version":"1.0","canonical_sha256":"3a6c8612b12c5a7f4635457c89da7b77a1337c06e0e3916b0b8a161509687953","source":{"kind":"arxiv","id":"astro-ph/9904304","version":1},"attestation_state":"computed","paper":{"title":"The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) University of Leicester, 3), (3) CAMK), C. Done (1), D. Smith (2) ((1) University of Durham, P. Zycki (1","submitted_at":"1999-04-22T15:11:06Z","abstract_excerpt":"We re-analyze archival Ginga data of the soft X-ray transient source GS 2023+338 covering the beginning of its May 1989 outburst. The source showed a number of rather unusual features: very high and apparently saturated luminosity, dramatic flux and spectral variability (often on ~1 sec time scale), generally very hard spectrum, with no obvious soft thermal component characteristic for soft/high state.\n  We describe the spectrum obtained at the maximum of flux and we demonstrate that it is very different from spectra of other soft X-ray transients at similar luminosity. We confirm previous sug"},"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":"astro-ph/9904304","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-04-22T15:11:06Z","cross_cats_sorted":[],"title_canon_sha256":"a48f799fbea171e36603d1e42610a465df1cd09ab23afc49a931f1b26dd52d20","abstract_canon_sha256":"ea8e86a16725dfad065748a72890c2d9ee337cd35dab49958d4ff0c6e41753f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:10:55.125091Z","signature_b64":"kbsleixR5dvmaybHGsplPVnLEnzEUCBYwjR4PipBdNlZKI5s0K2C6uH3iNSlmgT0r/G6c/unzZIjxd3osSkPAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a6c8612b12c5a7f4635457c89da7b77a1337c06e0e3916b0b8a161509687953","last_reissued_at":"2026-07-04T16:10:55.124612Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:10:55.124612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) University of Leicester, 3), (3) CAMK), C. Done (1), D. Smith (2) ((1) University of Durham, P. Zycki (1","submitted_at":"1999-04-22T15:11:06Z","abstract_excerpt":"We re-analyze archival Ginga data of the soft X-ray transient source GS 2023+338 covering the beginning of its May 1989 outburst. The source showed a number of rather unusual features: very high and apparently saturated luminosity, dramatic flux and spectral variability (often on ~1 sec time scale), generally very hard spectrum, with no obvious soft thermal component characteristic for soft/high state.\n  We describe the spectrum obtained at the maximum of flux and we demonstrate that it is very different from spectra of other soft X-ray transients at similar luminosity. We confirm previous sug"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9904304","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/astro-ph/9904304/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":"astro-ph/9904304","created_at":"2026-07-04T16:10:55.124670+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9904304v1","created_at":"2026-07-04T16:10:55.124670+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9904304","created_at":"2026-07-04T16:10:55.124670+00:00"},{"alias_kind":"pith_short_12","alias_value":"HJWIMEVRFRNH","created_at":"2026-07-04T16:10:55.124670+00:00"},{"alias_kind":"pith_short_16","alias_value":"HJWIMEVRFRNH6RRV","created_at":"2026-07-04T16:10:55.124670+00:00"},{"alias_kind":"pith_short_8","alias_value":"HJWIMEVR","created_at":"2026-07-04T16:10:55.124670+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2604.11710","citing_title":"A bright flare in the obscured state of GRS 1915+105 as seen by NICER and Swift","ref_index":30,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6","json":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6.json","graph_json":"https://pith.science/api/pith-number/HJWIMEVRFRNH6RRVIV6ITWT3O6/graph.json","events_json":"https://pith.science/api/pith-number/HJWIMEVRFRNH6RRVIV6ITWT3O6/events.json","paper":"https://pith.science/paper/HJWIMEVR"},"agent_actions":{"view_html":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6","download_json":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6.json","view_paper":"https://pith.science/paper/HJWIMEVR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9904304&json=true","fetch_graph":"https://pith.science/api/pith-number/HJWIMEVRFRNH6RRVIV6ITWT3O6/graph.json","fetch_events":"https://pith.science/api/pith-number/HJWIMEVRFRNH6RRVIV6ITWT3O6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6/action/storage_attestation","attest_author":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6/action/author_attestation","sign_citation":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6/action/citation_signature","submit_replication":"https://pith.science/pith/HJWIMEVRFRNH6RRVIV6ITWT3O6/action/replication_record"}},"created_at":"2026-07-04T16:10:55.124670+00:00","updated_at":"2026-07-04T16:10:55.124670+00:00"}