{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:PSZ2H3FWPKWEP4MAAQI2MFDMS2","short_pith_number":"pith:PSZ2H3FW","canonical_record":{"source":{"id":"astro-ph/9503003","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-03-01T11:39:06Z","cross_cats_sorted":[],"title_canon_sha256":"0d2c987f17b92289efdc928db8ba06c98b82daffe3befe9a741bfa583836958c","abstract_canon_sha256":"79b313b058ffc81d4cb1bade6391d2aaaf82b5c740d95859932ceab04739c6db"},"schema_version":"1.0"},"canonical_sha256":"7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52","source":{"kind":"arxiv","id":"astro-ph/9503003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9503003","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9503003v1","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9503003","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"pith_short_12","alias_value":"PSZ2H3FWPKWE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"PSZ2H3FWPKWEP4MA","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"PSZ2H3FW","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:PSZ2H3FWPKWEP4MAAQI2MFDMS2","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9503003","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-03-01T11:39:06Z","cross_cats_sorted":[],"title_canon_sha256":"0d2c987f17b92289efdc928db8ba06c98b82daffe3befe9a741bfa583836958c","abstract_canon_sha256":"79b313b058ffc81d4cb1bade6391d2aaaf82b5c740d95859932ceab04739c6db"},"schema_version":"1.0"},"canonical_sha256":"7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:42.044977Z","signature_b64":"3NmJbFncJGQyp2fmdIv1pYpduavAu+/eRHTskWi4z5bUb0L0urRcS7ZyXwYjILdIy5hNx8nSByY+76+clPoNDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52","last_reissued_at":"2026-05-18T01:07:42.044255Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:42.044255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9503003","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:07:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HP5yMz1V9969IlcEhePlqbSWlEpzWovjjILWg4bDYuZVEJpVEG+NpwhMi0d+RjW/XlOdX56jpGASpeS4OwmwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:55.326255Z"},"content_sha256":"0fbb30956ec77f816eb3fd87aafd54de082aab2b050def788ab2c2cacf01f1d8","schema_version":"1.0","event_id":"sha256:0fbb30956ec77f816eb3fd87aafd54de082aab2b050def788ab2c2cacf01f1d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:PSZ2H3FWPKWEP4MAAQI2MFDMS2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"WRAY 977 (GX301-2): A HYPERGIANT WITH PULSAR COMPANION","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"E.J. Zuiderwijk, E.P.J. van den Heuvel, E. Ruymaekers, H.J.G.L.M. Lamers, L. Kaper","submitted_at":"1995-03-01T11:39:06Z","abstract_excerpt":"Wray 977, the B supergiant companion of the X-ray pulsar GX301-2, should be classified as B1~Ia+, based on a comparison of its optical spectrum to that of zeta1 Sco, a well-known B hypergiant and ONE OF THE BRIGHTEST STARS IN THE GALAXY. The classification of Wray 977 as a hypergiant results in a new distance determination of the binary system, i.e. 5.3 kpc (previously 1.8 +/- 0.4 kpc). The ``average'' X-ray luminosity of the pulsar is then ~10^37 erg/s, in good agreement with the predicted X-ray luminosity resulting from accretion of a dense, low-velocity (v_infty = 400 km/s) stellar wind. A "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9503003","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:07:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4Jz4VwAxd3To3Gv6Zrlcw/Q8J6mP2G8lRdG4xOVy4yYxwQk4FaZWUqZ+cw50+/d18Rnye/Aw3mgPUm23yWsKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:55.326616Z"},"content_sha256":"f7ae4bf46019acbb5218cab366b8a7e6c67b12cbb4cf918e274ac2cfa8e60455","schema_version":"1.0","event_id":"sha256:f7ae4bf46019acbb5218cab366b8a7e6c67b12cbb4cf918e274ac2cfa8e60455"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/bundle.json","state_url":"https://pith.science/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T08:35:55Z","links":{"resolver":"https://pith.science/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2","bundle":"https://pith.science/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/bundle.json","state":"https://pith.science/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PSZ2H3FWPKWEP4MAAQI2MFDMS2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:PSZ2H3FWPKWEP4MAAQI2MFDMS2","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":"79b313b058ffc81d4cb1bade6391d2aaaf82b5c740d95859932ceab04739c6db","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-03-01T11:39:06Z","title_canon_sha256":"0d2c987f17b92289efdc928db8ba06c98b82daffe3befe9a741bfa583836958c"},"schema_version":"1.0","source":{"id":"astro-ph/9503003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9503003","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9503003v1","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9503003","created_at":"2026-05-18T01:07:42Z"},{"alias_kind":"pith_short_12","alias_value":"PSZ2H3FWPKWE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"PSZ2H3FWPKWEP4MA","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"PSZ2H3FW","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:f7ae4bf46019acbb5218cab366b8a7e6c67b12cbb4cf918e274ac2cfa8e60455","target":"graph","created_at":"2026-05-18T01:07:42Z","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":"Wray 977, the B supergiant companion of the X-ray pulsar GX301-2, should be classified as B1~Ia+, based on a comparison of its optical spectrum to that of zeta1 Sco, a well-known B hypergiant and ONE OF THE BRIGHTEST STARS IN THE GALAXY. The classification of Wray 977 as a hypergiant results in a new distance determination of the binary system, i.e. 5.3 kpc (previously 1.8 +/- 0.4 kpc). The ``average'' X-ray luminosity of the pulsar is then ~10^37 erg/s, in good agreement with the predicted X-ray luminosity resulting from accretion of a dense, low-velocity (v_infty = 400 km/s) stellar wind. A ","authors_text":"E.J. Zuiderwijk, E.P.J. van den Heuvel, E. Ruymaekers, H.J.G.L.M. Lamers, L. Kaper","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1995-03-01T11:39:06Z","title":"WRAY 977 (GX301-2): A HYPERGIANT WITH PULSAR COMPANION"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9503003","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":"sha256:0fbb30956ec77f816eb3fd87aafd54de082aab2b050def788ab2c2cacf01f1d8","target":"record","created_at":"2026-05-18T01:07:42Z","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":"79b313b058ffc81d4cb1bade6391d2aaaf82b5c740d95859932ceab04739c6db","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-03-01T11:39:06Z","title_canon_sha256":"0d2c987f17b92289efdc928db8ba06c98b82daffe3befe9a741bfa583836958c"},"schema_version":"1.0","source":{"id":"astro-ph/9503003","kind":"arxiv","version":1}},"canonical_sha256":"7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7cb3a3ecb67aac47f1800411a6146c96a390910e0226322d6c27210933ca2b52","first_computed_at":"2026-05-18T01:07:42.044255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:42.044255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3NmJbFncJGQyp2fmdIv1pYpduavAu+/eRHTskWi4z5bUb0L0urRcS7ZyXwYjILdIy5hNx8nSByY+76+clPoNDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:42.044977Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9503003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0fbb30956ec77f816eb3fd87aafd54de082aab2b050def788ab2c2cacf01f1d8","sha256:f7ae4bf46019acbb5218cab366b8a7e6c67b12cbb4cf918e274ac2cfa8e60455"],"state_sha256":"a24268dc48b0ca73a0445dcb0939a1dbd09bbcd3e024ab7161f22b8eb554d76f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IWULGumh7toFQ02ngvXZ/gM1SgL7VasYMeQG+Kz5qW4P5C5RGw2NTRT7TKH5RfZvks3qGfbUHDoXc1Ce208WAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:35:55.328575Z","bundle_sha256":"d8577e044c5577b2b4e41ebaf6149b4d6562b6ceda2dd6afe3948d3542f483b3"}}