{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VJPR5PKXK53FM4C32BTRRHDEBH","short_pith_number":"pith:VJPR5PKX","canonical_record":{"source":{"id":"1811.11267","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-27T21:29:50Z","cross_cats_sorted":[],"title_canon_sha256":"016bac9dc41eb29156039efe7cced5c5edd6a7b1380c8a315c829192de6804a6","abstract_canon_sha256":"84af8f6cfd99f4d3bfa9dfd27fd2f3f9e88106e79babee6b892ee97dfd522e5f"},"schema_version":"1.0"},"canonical_sha256":"aa5f1ebd57577656705bd067189c6409db00b060380336eea4fd25c20c742abe","source":{"kind":"arxiv","id":"1811.11267","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.11267","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"arxiv_version","alias_value":"1811.11267v1","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.11267","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"pith_short_12","alias_value":"VJPR5PKXK53F","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VJPR5PKXK53FM4C3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VJPR5PKX","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VJPR5PKXK53FM4C32BTRRHDEBH","target":"record","payload":{"canonical_record":{"source":{"id":"1811.11267","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-27T21:29:50Z","cross_cats_sorted":[],"title_canon_sha256":"016bac9dc41eb29156039efe7cced5c5edd6a7b1380c8a315c829192de6804a6","abstract_canon_sha256":"84af8f6cfd99f4d3bfa9dfd27fd2f3f9e88106e79babee6b892ee97dfd522e5f"},"schema_version":"1.0"},"canonical_sha256":"aa5f1ebd57577656705bd067189c6409db00b060380336eea4fd25c20c742abe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:27.527796Z","signature_b64":"4gjOWg7KaHAh3CCc/ZLvCgBLVzyBC6pALk78qLqmqbQEhZHmxV8f4PEk1gp6bPJnEHvoiCNCR8T3a0X1DN1mCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa5f1ebd57577656705bd067189c6409db00b060380336eea4fd25c20c742abe","last_reissued_at":"2026-05-17T23:56:27.527391Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:27.527391Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.11267","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":"2026-05-17T23:56:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yRRdMl/6M/XWIojKp4TfVFdFweQN9L3zbXDR7je907TAgKKasWm/dP1WGtxE9HheOlfrbKta2lRUoHjm1F0lCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:25:11.089768Z"},"content_sha256":"4f39a32502dc3dce7ae5dc5b008a8ac1a7480a91c6f42ea6b8c6aa1a0988ffc4","schema_version":"1.0","event_id":"sha256:4f39a32502dc3dce7ae5dc5b008a8ac1a7480a91c6f42ea6b8c6aa1a0988ffc4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VJPR5PKXK53FM4C32BTRRHDEBH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ALMA, ATCA, and Spitzer Observations of the Luminous Extragalactic Supernova SN 1978K","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"E. C. Kool, I. A. Smith, R. Kotak, S. D. Ryder, S. K. Randall","submitted_at":"2018-11-27T21:29:50Z","abstract_excerpt":"Only three extragalactic supernovae have been detected at late times at millimeter wavelengths: SN 1987A, SN 1978K, and SN 1996cr. SN 1978K is a remarkably luminous Type IIn supernova that remains bright at all wavelengths 40 years after its explosion. Here we present Atacama Large Millimeter/submillimeter Array (ALMA) observations taken in 2016 using Bands 3, 4, 6, and 7 that show a steepening in the spectrum. An absorbed single power law model broadly fits all the radio and millimeter observations, but would require significant chromatic variability. Alternatively, a broken power law fits th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.11267","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":"2026-05-17T23:56:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/MnAwfK/DizMR8ZsgmLSBYtlBm3+/PEH+75I0FdHo+47T5rQf0SLiKz+HNessrMQNirnsAe9f2LFi6ZywaHmCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:25:11.090482Z"},"content_sha256":"d64bfdcae6380b4483dbe0dfb5e546475a3d2054ca744501299b0ea402a3d63c","schema_version":"1.0","event_id":"sha256:d64bfdcae6380b4483dbe0dfb5e546475a3d2054ca744501299b0ea402a3d63c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VJPR5PKXK53FM4C32BTRRHDEBH/bundle.json","state_url":"https://pith.science/pith/VJPR5PKXK53FM4C32BTRRHDEBH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VJPR5PKXK53FM4C32BTRRHDEBH/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":"2026-05-26T02:25:11Z","links":{"resolver":"https://pith.science/pith/VJPR5PKXK53FM4C32BTRRHDEBH","bundle":"https://pith.science/pith/VJPR5PKXK53FM4C32BTRRHDEBH/bundle.json","state":"https://pith.science/pith/VJPR5PKXK53FM4C32BTRRHDEBH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VJPR5PKXK53FM4C32BTRRHDEBH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VJPR5PKXK53FM4C32BTRRHDEBH","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":"84af8f6cfd99f4d3bfa9dfd27fd2f3f9e88106e79babee6b892ee97dfd522e5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-27T21:29:50Z","title_canon_sha256":"016bac9dc41eb29156039efe7cced5c5edd6a7b1380c8a315c829192de6804a6"},"schema_version":"1.0","source":{"id":"1811.11267","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.11267","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"arxiv_version","alias_value":"1811.11267v1","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.11267","created_at":"2026-05-17T23:56:27Z"},{"alias_kind":"pith_short_12","alias_value":"VJPR5PKXK53F","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VJPR5PKXK53FM4C3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VJPR5PKX","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:d64bfdcae6380b4483dbe0dfb5e546475a3d2054ca744501299b0ea402a3d63c","target":"graph","created_at":"2026-05-17T23:56:27Z","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":"Only three extragalactic supernovae have been detected at late times at millimeter wavelengths: SN 1987A, SN 1978K, and SN 1996cr. SN 1978K is a remarkably luminous Type IIn supernova that remains bright at all wavelengths 40 years after its explosion. Here we present Atacama Large Millimeter/submillimeter Array (ALMA) observations taken in 2016 using Bands 3, 4, 6, and 7 that show a steepening in the spectrum. An absorbed single power law model broadly fits all the radio and millimeter observations, but would require significant chromatic variability. Alternatively, a broken power law fits th","authors_text":"E. C. Kool, I. A. Smith, R. Kotak, S. D. Ryder, S. K. Randall","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-27T21:29:50Z","title":"ALMA, ATCA, and Spitzer Observations of the Luminous Extragalactic Supernova SN 1978K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.11267","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":"sha256:4f39a32502dc3dce7ae5dc5b008a8ac1a7480a91c6f42ea6b8c6aa1a0988ffc4","target":"record","created_at":"2026-05-17T23:56:27Z","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":"84af8f6cfd99f4d3bfa9dfd27fd2f3f9e88106e79babee6b892ee97dfd522e5f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-27T21:29:50Z","title_canon_sha256":"016bac9dc41eb29156039efe7cced5c5edd6a7b1380c8a315c829192de6804a6"},"schema_version":"1.0","source":{"id":"1811.11267","kind":"arxiv","version":1}},"canonical_sha256":"aa5f1ebd57577656705bd067189c6409db00b060380336eea4fd25c20c742abe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa5f1ebd57577656705bd067189c6409db00b060380336eea4fd25c20c742abe","first_computed_at":"2026-05-17T23:56:27.527391Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:27.527391Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4gjOWg7KaHAh3CCc/ZLvCgBLVzyBC6pALk78qLqmqbQEhZHmxV8f4PEk1gp6bPJnEHvoiCNCR8T3a0X1DN1mCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:27.527796Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.11267","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f39a32502dc3dce7ae5dc5b008a8ac1a7480a91c6f42ea6b8c6aa1a0988ffc4","sha256:d64bfdcae6380b4483dbe0dfb5e546475a3d2054ca744501299b0ea402a3d63c"],"state_sha256":"95714d9b5b2f0a8efa005c80e091821fec2f009e3affca55f13fad8aa22578a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VfClAGv1GERJk/o+eArJ10h2fk64X5t6E86jBvDW9ZYvl+ILltHxJ6d3+HVjFKN1qFjo7wJPhgXYXdSLyMI3Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:25:11.094385Z","bundle_sha256":"02b51fab8768359d0927e1fd865347f4e08d2e17e453ebf0b264e33bc61dba3f"}}