{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:SR2JAQ4PXPZE2M377RKFJO5FZH","short_pith_number":"pith:SR2JAQ4P","canonical_record":{"source":{"id":"astro-ph/0110693","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-10-31T11:04:09Z","cross_cats_sorted":[],"title_canon_sha256":"11de6bd163bc372a393af63cb81c9bb76b79a52086bb98ef78b3877d65125a61","abstract_canon_sha256":"8870712bc47d7b90326264ed54a9599215d81426fa1e030dda944c6be9a29e42"},"schema_version":"1.0"},"canonical_sha256":"947490438fbbf24d337ffc5454bba5c9c6915c0ec90eaad5327e55fda1862b06","source":{"kind":"arxiv","id":"astro-ph/0110693","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0110693","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0110693v1","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0110693","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_12","alias_value":"SR2JAQ4PXPZE","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_16","alias_value":"SR2JAQ4PXPZE2M37","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_8","alias_value":"SR2JAQ4P","created_at":"2026-07-04T16:24:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:SR2JAQ4PXPZE2M377RKFJO5FZH","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0110693","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-10-31T11:04:09Z","cross_cats_sorted":[],"title_canon_sha256":"11de6bd163bc372a393af63cb81c9bb76b79a52086bb98ef78b3877d65125a61","abstract_canon_sha256":"8870712bc47d7b90326264ed54a9599215d81426fa1e030dda944c6be9a29e42"},"schema_version":"1.0"},"canonical_sha256":"947490438fbbf24d337ffc5454bba5c9c6915c0ec90eaad5327e55fda1862b06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:24:23.361662Z","signature_b64":"zycJy0Ezg4JnmqAZ0VDoWuBX6zCdN9t08/ETeQwBErST8EdWEJ6ZhLyWcg3Yr2IiFeDdH+Jkzvx7t2kilTc7CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"947490438fbbf24d337ffc5454bba5c9c6915c0ec90eaad5327e55fda1862b06","last_reissued_at":"2026-07-04T16:24:23.361257Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:24:23.361257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0110693","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":"2026-07-04T16:24:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bljqfKVNECaeYSMSSZDqRVrhoo7d+K1tI5QubOT4mHrsHC4+lVN2ivfmojEvTQ4EBV6W+ewU8fWyOGr1YTThBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:05:38.492364Z"},"content_sha256":"02feaaa34829d0e049ec1f4819a194ed18a0992f3dfd780b02172e7758375e70","schema_version":"1.0","event_id":"sha256:02feaaa34829d0e049ec1f4819a194ed18a0992f3dfd780b02172e7758375e70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:SR2JAQ4PXPZE2M377RKFJO5FZH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolution of the Radio Remnant of SN 1987A: 1990 -- 2001","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. K. Tzioumis, B. M. Gaensler, J. E. Reynolds, K. J. Kesteven, L. Staveley-Smith, N. S. Bizunok, R. N. Manchester, V. C. Wheaton","submitted_at":"2001-10-31T11:04:09Z","abstract_excerpt":"The development of the radio remnant of SN 1987A has been followed using the Australia Telescope Compact Array since its first detection in 1990 August. The remnant has been observed at four frequencies, 1.4, 2.4, 4.8 and 8.6 GHz, at intervals of 4 - 6 weeks since the first detection. These data are combined with the 843 MHz data set of Ball et al. (2001) obtained at Molonglo Observatory to study the spectral and temporal variations of the emission. These observations show that the remnant continues to increase in brightness, with a larger rate of increase at recent times. They also show that "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0110693","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/0110693/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":"2026-07-04T16:24:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sL+G1i6ezuuPNfFYExpu9t2frNtmXKScKL+E9JDKWE00l2/Q1rqpzOQKQ0dPlYrJMYhCvnrQLvnSk2S8f+lbAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:05:38.492858Z"},"content_sha256":"be07a5e5af01b38bc2b4d1ee3dba73570b81fcd8d4bafddbcd267d39aaa3f5da","schema_version":"1.0","event_id":"sha256:be07a5e5af01b38bc2b4d1ee3dba73570b81fcd8d4bafddbcd267d39aaa3f5da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/bundle.json","state_url":"https://pith.science/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/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":"2026-08-13T00:05:38Z","links":{"resolver":"https://pith.science/pith/SR2JAQ4PXPZE2M377RKFJO5FZH","bundle":"https://pith.science/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/bundle.json","state":"https://pith.science/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SR2JAQ4PXPZE2M377RKFJO5FZH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:SR2JAQ4PXPZE2M377RKFJO5FZH","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":"8870712bc47d7b90326264ed54a9599215d81426fa1e030dda944c6be9a29e42","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-10-31T11:04:09Z","title_canon_sha256":"11de6bd163bc372a393af63cb81c9bb76b79a52086bb98ef78b3877d65125a61"},"schema_version":"1.0","source":{"id":"astro-ph/0110693","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0110693","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0110693v1","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0110693","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_12","alias_value":"SR2JAQ4PXPZE","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_16","alias_value":"SR2JAQ4PXPZE2M37","created_at":"2026-07-04T16:24:23Z"},{"alias_kind":"pith_short_8","alias_value":"SR2JAQ4P","created_at":"2026-07-04T16:24:23Z"}],"graph_snapshots":[{"event_id":"sha256:be07a5e5af01b38bc2b4d1ee3dba73570b81fcd8d4bafddbcd267d39aaa3f5da","target":"graph","created_at":"2026-07-04T16:24:23Z","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/0110693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The development of the radio remnant of SN 1987A has been followed using the Australia Telescope Compact Array since its first detection in 1990 August. The remnant has been observed at four frequencies, 1.4, 2.4, 4.8 and 8.6 GHz, at intervals of 4 - 6 weeks since the first detection. These data are combined with the 843 MHz data set of Ball et al. (2001) obtained at Molonglo Observatory to study the spectral and temporal variations of the emission. These observations show that the remnant continues to increase in brightness, with a larger rate of increase at recent times. They also show that ","authors_text":"A. K. Tzioumis, B. M. Gaensler, J. E. Reynolds, K. J. Kesteven, L. Staveley-Smith, N. S. Bizunok, R. N. Manchester, V. C. Wheaton","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-10-31T11:04:09Z","title":"Evolution of the Radio Remnant of SN 1987A: 1990 -- 2001"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0110693","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":"sha256:02feaaa34829d0e049ec1f4819a194ed18a0992f3dfd780b02172e7758375e70","target":"record","created_at":"2026-07-04T16:24:23Z","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":"8870712bc47d7b90326264ed54a9599215d81426fa1e030dda944c6be9a29e42","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-10-31T11:04:09Z","title_canon_sha256":"11de6bd163bc372a393af63cb81c9bb76b79a52086bb98ef78b3877d65125a61"},"schema_version":"1.0","source":{"id":"astro-ph/0110693","kind":"arxiv","version":1}},"canonical_sha256":"947490438fbbf24d337ffc5454bba5c9c6915c0ec90eaad5327e55fda1862b06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"947490438fbbf24d337ffc5454bba5c9c6915c0ec90eaad5327e55fda1862b06","first_computed_at":"2026-07-04T16:24:23.361257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:24:23.361257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zycJy0Ezg4JnmqAZ0VDoWuBX6zCdN9t08/ETeQwBErST8EdWEJ6ZhLyWcg3Yr2IiFeDdH+Jkzvx7t2kilTc7CA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:24:23.361662Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0110693","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02feaaa34829d0e049ec1f4819a194ed18a0992f3dfd780b02172e7758375e70","sha256:be07a5e5af01b38bc2b4d1ee3dba73570b81fcd8d4bafddbcd267d39aaa3f5da"],"state_sha256":"39f8922de7918122a5e93a2c6c1444eaefebc387236368ccf875aa7c04b485d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xUNpzl/QZn2keN941Fjx4wX8hbcUsI9A/X8MtvjPm/nZXtmoT7dnsSlCTKl0YLD8arxUlD1YOC8CUuNwOePzBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T00:05:38.497830Z","bundle_sha256":"f9bbce90410b035821163c83422e15f5420828c13e29ae51eebf4964a3c1222b"}}