{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:QQS7NT7H6NH6ZVIRZ2QBHCG5AH","short_pith_number":"pith:QQS7NT7H","canonical_record":{"source":{"id":"astro-ph/9809089","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-08T10:17:11Z","cross_cats_sorted":[],"title_canon_sha256":"645f23de18980bc3280fd39b77bd40142f21f3f367b5a68d3eaee723120bbbac","abstract_canon_sha256":"16e74bf0e0b46c4ad972500128dec017c8a9d6d7ca3a5c84b5b90606b96b4ddf"},"schema_version":"1.0"},"canonical_sha256":"8425f6cfe7f34fecd511cea01388dd01deaef097d35074000126276d733b2090","source":{"kind":"arxiv","id":"astro-ph/9809089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9809089","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9809089v1","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9809089","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_12","alias_value":"QQS7NT7H6NH6","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_16","alias_value":"QQS7NT7H6NH6ZVIR","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_8","alias_value":"QQS7NT7H","created_at":"2026-07-04T14:16:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:QQS7NT7H6NH6ZVIRZ2QBHCG5AH","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9809089","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-08T10:17:11Z","cross_cats_sorted":[],"title_canon_sha256":"645f23de18980bc3280fd39b77bd40142f21f3f367b5a68d3eaee723120bbbac","abstract_canon_sha256":"16e74bf0e0b46c4ad972500128dec017c8a9d6d7ca3a5c84b5b90606b96b4ddf"},"schema_version":"1.0"},"canonical_sha256":"8425f6cfe7f34fecd511cea01388dd01deaef097d35074000126276d733b2090","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:16:00.805486Z","signature_b64":"zlzKdTPb+V+3QYHolAb2qX8qSiye547X/byu5FS6JX6/H9sOyen20RIzeaYYk19ePWekeacJuiElCdWes8ISBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8425f6cfe7f34fecd511cea01388dd01deaef097d35074000126276d733b2090","last_reissued_at":"2026-07-04T14:16:00.805014Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:16:00.805014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9809089","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":"2026-07-04T14:16:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7xzq8wAJQBcIrJ15CmL2dpRLs37YK6Uxl5ckJ96iL64C+oulYzZN9+zp3gGJHMAi4TF/YV6Y5FuHVba0UHxkAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T02:58:32.479814Z"},"content_sha256":"52cc9f73e63b3979f02c6e8d5184e35bc0c517efae49fb217125cd4376479731","schema_version":"1.0","event_id":"sha256:52cc9f73e63b3979f02c6e8d5184e35bc0c517efae49fb217125cd4376479731"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:QQS7NT7H6NH6ZVIRZ2QBHCG5AH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase Variability in the Optical Polarization of GRO J1655--40","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"E. Trussoni, F. Scaltriti, G. Bodo, G. Ghisellini, M. Gliozzi","submitted_at":"1998-09-08T10:17:11Z","abstract_excerpt":"We present the results of the new optical polarimetric observations of the superluminal source GRO J1655--40, carried out in July 1997, with the multichannel photopolarimeter of the Torino Observatory, using the 2.15-m telescope of Complejo Astronomico El Leoncito (Argentina). The observed amount of polarization shows (mainly in the $V$ and $I$ bands) oscillations which are consistent with the orbital period of the system. This gives information about physical and geometrical properties of the binary system and confirms that the optical continuum is intrinsically polarized. The origin of the p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9809089","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/9809089/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T14:16:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aJUNIYCF4zA8tOgSsZmaLcb382YKEIqgyYilvaqaLKrO3E3mu8ZQ8hixtFamu2twE7ClOU3fN0q6SbWtFSkPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T02:58:32.480298Z"},"content_sha256":"58b27db81a1f7f897ef4693d2f621d7518315af6f352c5ee4921876dfd84bce3","schema_version":"1.0","event_id":"sha256:58b27db81a1f7f897ef4693d2f621d7518315af6f352c5ee4921876dfd84bce3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/bundle.json","state_url":"https://pith.science/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/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":"2026-08-15T02:58:32Z","links":{"resolver":"https://pith.science/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH","bundle":"https://pith.science/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/bundle.json","state":"https://pith.science/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QQS7NT7H6NH6ZVIRZ2QBHCG5AH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:QQS7NT7H6NH6ZVIRZ2QBHCG5AH","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":"16e74bf0e0b46c4ad972500128dec017c8a9d6d7ca3a5c84b5b90606b96b4ddf","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-08T10:17:11Z","title_canon_sha256":"645f23de18980bc3280fd39b77bd40142f21f3f367b5a68d3eaee723120bbbac"},"schema_version":"1.0","source":{"id":"astro-ph/9809089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9809089","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9809089v1","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9809089","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_12","alias_value":"QQS7NT7H6NH6","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_16","alias_value":"QQS7NT7H6NH6ZVIR","created_at":"2026-07-04T14:16:00Z"},{"alias_kind":"pith_short_8","alias_value":"QQS7NT7H","created_at":"2026-07-04T14:16:00Z"}],"graph_snapshots":[{"event_id":"sha256:58b27db81a1f7f897ef4693d2f621d7518315af6f352c5ee4921876dfd84bce3","target":"graph","created_at":"2026-07-04T14:16:00Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9809089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of the new optical polarimetric observations of the superluminal source GRO J1655--40, carried out in July 1997, with the multichannel photopolarimeter of the Torino Observatory, using the 2.15-m telescope of Complejo Astronomico El Leoncito (Argentina). The observed amount of polarization shows (mainly in the $V$ and $I$ bands) oscillations which are consistent with the orbital period of the system. This gives information about physical and geometrical properties of the binary system and confirms that the optical continuum is intrinsically polarized. The origin of the p","authors_text":"E. Trussoni, F. Scaltriti, G. Bodo, G. Ghisellini, M. Gliozzi","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-09-08T10:17:11Z","title":"Phase Variability in the Optical Polarization of GRO J1655--40"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9809089","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":"sha256:52cc9f73e63b3979f02c6e8d5184e35bc0c517efae49fb217125cd4376479731","target":"record","created_at":"2026-07-04T14:16:00Z","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":"16e74bf0e0b46c4ad972500128dec017c8a9d6d7ca3a5c84b5b90606b96b4ddf","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-08T10:17:11Z","title_canon_sha256":"645f23de18980bc3280fd39b77bd40142f21f3f367b5a68d3eaee723120bbbac"},"schema_version":"1.0","source":{"id":"astro-ph/9809089","kind":"arxiv","version":1}},"canonical_sha256":"8425f6cfe7f34fecd511cea01388dd01deaef097d35074000126276d733b2090","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8425f6cfe7f34fecd511cea01388dd01deaef097d35074000126276d733b2090","first_computed_at":"2026-07-04T14:16:00.805014Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:16:00.805014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zlzKdTPb+V+3QYHolAb2qX8qSiye547X/byu5FS6JX6/H9sOyen20RIzeaYYk19ePWekeacJuiElCdWes8ISBg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:16:00.805486Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9809089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52cc9f73e63b3979f02c6e8d5184e35bc0c517efae49fb217125cd4376479731","sha256:58b27db81a1f7f897ef4693d2f621d7518315af6f352c5ee4921876dfd84bce3"],"state_sha256":"d637ad1c2ed7621aeb5398a2b214f1f896a30bffb9fa42af1512067e897f24d1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+u3zSvIiBjfjZtJfURajJ7ArrfxglMrLEerYeoKBtqHP3jlJlbjI+ejsXsoJ1SvIg67Ug5efnQljIOHRbdZlCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T02:58:32.483878Z","bundle_sha256":"288abf7846874bdcaf290fb4b8502388984f227741d18ef476b37af540b5cbac"}}