{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:HLS6PGWYPRZWVQTGBQQA2A7LRU","short_pith_number":"pith:HLS6PGWY","canonical_record":{"source":{"id":"astro-ph/9802003","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-31T22:24:57Z","cross_cats_sorted":[],"title_canon_sha256":"cdca361659a3af0050510d951b7fb210e6ceea91133543aaa2d0fb3979cfda8a","abstract_canon_sha256":"db9a6251c41df71f7db39148340e4edbb58f7998e3c98f254cee0d260d866502"},"schema_version":"1.0"},"canonical_sha256":"3ae5e79ad87c736ac2660c200d03eb8d33d77a100dff61958e517c943d71bb3a","source":{"kind":"arxiv","id":"astro-ph/9802003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9802003","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9802003v1","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9802003","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_12","alias_value":"HLS6PGWYPRZW","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_16","alias_value":"HLS6PGWYPRZWVQTG","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_8","alias_value":"HLS6PGWY","created_at":"2026-07-04T15:46:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:HLS6PGWYPRZWVQTGBQQA2A7LRU","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9802003","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-31T22:24:57Z","cross_cats_sorted":[],"title_canon_sha256":"cdca361659a3af0050510d951b7fb210e6ceea91133543aaa2d0fb3979cfda8a","abstract_canon_sha256":"db9a6251c41df71f7db39148340e4edbb58f7998e3c98f254cee0d260d866502"},"schema_version":"1.0"},"canonical_sha256":"3ae5e79ad87c736ac2660c200d03eb8d33d77a100dff61958e517c943d71bb3a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:46:56.617689Z","signature_b64":"CZtlvGvuNMr3prO9HBu4YLUfNZOTc805nad4YghdlJLNIFezl67Jktsvzt0zKW16FGuDSBFk2xjCY8VrMojEAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ae5e79ad87c736ac2660c200d03eb8d33d77a100dff61958e517c943d71bb3a","last_reissued_at":"2026-07-04T15:46:56.617290Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:46:56.617290Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9802003","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":"2026-07-04T15:46:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SaAz53uKU/Qq8CyX4/JFoPYjJdfYiZ5/yicSRwBHyOMqyKj63mTfqyg5nLhHUpXkb2g1qFOZMOUVLhczKReAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T15:49:53.681647Z"},"content_sha256":"e9899194f52c91da0f68a93317865e977b113078d4d41748bbc20e0ea698f698","schema_version":"1.0","event_id":"sha256:e9899194f52c91da0f68a93317865e977b113078d4d41748bbc20e0ea698f698"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:HLS6PGWYPRZWVQTGBQQA2A7LRU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Starburst-like Dust Extinction in the Small Magellanic Cloud","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"G. C. Clayton, K. D. Gordon","submitted_at":"1998-01-31T22:24:57Z","abstract_excerpt":"The recent discovery that the UV dust extinction in starburst galaxies is similar to that found in the Small Magellanic Cloud (SMC) motivated us to re-investigate the ultraviolet (UV) extinction found in the SMC. We have been able to improve significantly on previous studies by carefully choosing pairs of well matched reddened and unreddened stars. In addition, we benefited from the improved S/N of the NEWSIPS IUE data and the larger sample of SMC stars now available. Searching the IUE Final Archive, we found only four suitable early-type stars that were significantly reddened and had well mat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9802003","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/9802003/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":"2026-07-04T15:46:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"70m4JYP03FFjsFDcqnlV+b26OfDaUMGswEBjuSP4wxPPADrMIhJxggR26xVmmsKH00b1/jF9cQ+8/jyW/dc3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T15:49:53.682263Z"},"content_sha256":"0512e99dd212b07d96c178fed42b0e5a0655dfbf49cdafcaf66ab05fd13d0979","schema_version":"1.0","event_id":"sha256:0512e99dd212b07d96c178fed42b0e5a0655dfbf49cdafcaf66ab05fd13d0979"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/bundle.json","state_url":"https://pith.science/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/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":"2026-08-12T15:49:53Z","links":{"resolver":"https://pith.science/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU","bundle":"https://pith.science/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/bundle.json","state":"https://pith.science/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HLS6PGWYPRZWVQTGBQQA2A7LRU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:HLS6PGWYPRZWVQTGBQQA2A7LRU","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":"db9a6251c41df71f7db39148340e4edbb58f7998e3c98f254cee0d260d866502","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-31T22:24:57Z","title_canon_sha256":"cdca361659a3af0050510d951b7fb210e6ceea91133543aaa2d0fb3979cfda8a"},"schema_version":"1.0","source":{"id":"astro-ph/9802003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9802003","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9802003v1","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9802003","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_12","alias_value":"HLS6PGWYPRZW","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_16","alias_value":"HLS6PGWYPRZWVQTG","created_at":"2026-07-04T15:46:56Z"},{"alias_kind":"pith_short_8","alias_value":"HLS6PGWY","created_at":"2026-07-04T15:46:56Z"}],"graph_snapshots":[{"event_id":"sha256:0512e99dd212b07d96c178fed42b0e5a0655dfbf49cdafcaf66ab05fd13d0979","target":"graph","created_at":"2026-07-04T15:46:56Z","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/9802003/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The recent discovery that the UV dust extinction in starburst galaxies is similar to that found in the Small Magellanic Cloud (SMC) motivated us to re-investigate the ultraviolet (UV) extinction found in the SMC. We have been able to improve significantly on previous studies by carefully choosing pairs of well matched reddened and unreddened stars. In addition, we benefited from the improved S/N of the NEWSIPS IUE data and the larger sample of SMC stars now available. Searching the IUE Final Archive, we found only four suitable early-type stars that were significantly reddened and had well mat","authors_text":"G. C. Clayton, K. D. Gordon","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-01-31T22:24:57Z","title":"Starburst-like Dust Extinction in the Small Magellanic Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9802003","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:e9899194f52c91da0f68a93317865e977b113078d4d41748bbc20e0ea698f698","target":"record","created_at":"2026-07-04T15:46:56Z","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":"db9a6251c41df71f7db39148340e4edbb58f7998e3c98f254cee0d260d866502","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-31T22:24:57Z","title_canon_sha256":"cdca361659a3af0050510d951b7fb210e6ceea91133543aaa2d0fb3979cfda8a"},"schema_version":"1.0","source":{"id":"astro-ph/9802003","kind":"arxiv","version":1}},"canonical_sha256":"3ae5e79ad87c736ac2660c200d03eb8d33d77a100dff61958e517c943d71bb3a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ae5e79ad87c736ac2660c200d03eb8d33d77a100dff61958e517c943d71bb3a","first_computed_at":"2026-07-04T15:46:56.617290Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:46:56.617290Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CZtlvGvuNMr3prO9HBu4YLUfNZOTc805nad4YghdlJLNIFezl67Jktsvzt0zKW16FGuDSBFk2xjCY8VrMojEAw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:46:56.617689Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9802003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9899194f52c91da0f68a93317865e977b113078d4d41748bbc20e0ea698f698","sha256:0512e99dd212b07d96c178fed42b0e5a0655dfbf49cdafcaf66ab05fd13d0979"],"state_sha256":"e15b6a7c32c6cbaab1bab65329c76cf57707d799381f9b3a308bfe709a0a8ced"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ixBaCvfvzxzo5uC1XbT4/wacbk81j146RpqdGPS+3N/+jm2wLz2lg/N9LlkoWlXExm0p07bxaG2q1vxF9wmAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T15:49:53.688094Z","bundle_sha256":"cc495bbedf4053415f55ffb4b6f8976bd209a324d0ad45f152019cd8bf763208"}}