{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:SSBRYJ6QR7W7KDZYLFSKPK2BN6","short_pith_number":"pith:SSBRYJ6Q","canonical_record":{"source":{"id":"astro-ph/0104316","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-18T23:11:45Z","cross_cats_sorted":[],"title_canon_sha256":"ec1138f4111984b5b5ef75ada27639f7367563cd60bb4f412eecaf361b671230","abstract_canon_sha256":"e972fe57949d8f7a0b87793b9bfcbdabb15b70cd9fc4772b305e115d1f54fe51"},"schema_version":"1.0"},"canonical_sha256":"94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00","source":{"kind":"arxiv","id":"astro-ph/0104316","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0104316","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0104316v1","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0104316","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"pith_short_12","alias_value":"SSBRYJ6QR7W7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"SSBRYJ6QR7W7KDZY","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"SSBRYJ6Q","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:SSBRYJ6QR7W7KDZYLFSKPK2BN6","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0104316","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-18T23:11:45Z","cross_cats_sorted":[],"title_canon_sha256":"ec1138f4111984b5b5ef75ada27639f7367563cd60bb4f412eecaf361b671230","abstract_canon_sha256":"e972fe57949d8f7a0b87793b9bfcbdabb15b70cd9fc4772b305e115d1f54fe51"},"schema_version":"1.0"},"canonical_sha256":"94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:51.755692Z","signature_b64":"yi3PF5QbfKFFKZRgrZXMqEIpiXxtFXVIUN8wPy5gXJuGOIczKkzVI2/sLn8iixDYbrvnug86PT+6ML9NPA6yAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00","last_reissued_at":"2026-05-18T03:47:51.755296Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:51.755296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0104316","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":"2026-05-18T03:47:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wI27tJFM9c3vn6qDI01AnwIB3wO5NFP/J362BpPL7rFHipzGok5l0YSehxip5eM47ma3OktG1T0jo18Wipg9AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:33:55.791114Z"},"content_sha256":"07418b57829ac6b4a1bfd40bad11be851b038f375ae714e40b55d3c63d247913","schema_version":"1.0","event_id":"sha256:07418b57829ac6b4a1bfd40bad11be851b038f375ae714e40b55d3c63d247913"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:SSBRYJ6QR7W7KDZYLFSKPK2BN6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Obscuring Starburst of NGC 6221 and Implications for the Hard X-ray Background","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jr. (JHU), K. A. Weaver (JHU/GSFC), N. A. Levenson (JHU), R. Cid Fernandes, T. M. Heckman (JHU), T. Storchi-Bergmann (UFRGS)","submitted_at":"2001-04-18T23:11:45Z","abstract_excerpt":"We present NGC 6221 as a case study of ``X-ray loud composite galaxies,'' which appear similar to starbursts at optical wavelengths and resemble traditional active galactic nuclei in X-rays. The net optical spectrum of NGC 6221 is properly characterized as a starburst galaxy, but in X-rays, NGC 6221 is similar to Seyfert 1 galaxies, exhibiting a power-law continuum spectrum, a broad Fe K alpha line, and continuum variability on timescales of days and years. High-resolution images reveal that the detected active nucleus is relatively weak, not only at optical, but also at near-infrared waveleng"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0104316","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":"2026-05-18T03:47:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T9qir11kYcp2n8jUYD41bdpS5KvH322Q9TMsecTAn+xL20p/k2ut48TTZndsr9NV5Kntq13ms6ZqnAiVfPbhCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:33:55.791475Z"},"content_sha256":"e100a6db13d42621fba50e833f4ef50dce783290ead0537b655b0d49ed2ea743","schema_version":"1.0","event_id":"sha256:e100a6db13d42621fba50e833f4ef50dce783290ead0537b655b0d49ed2ea743"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/bundle.json","state_url":"https://pith.science/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/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":"2026-05-28T12:33:55Z","links":{"resolver":"https://pith.science/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6","bundle":"https://pith.science/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/bundle.json","state":"https://pith.science/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSBRYJ6QR7W7KDZYLFSKPK2BN6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:SSBRYJ6QR7W7KDZYLFSKPK2BN6","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":"e972fe57949d8f7a0b87793b9bfcbdabb15b70cd9fc4772b305e115d1f54fe51","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-18T23:11:45Z","title_canon_sha256":"ec1138f4111984b5b5ef75ada27639f7367563cd60bb4f412eecaf361b671230"},"schema_version":"1.0","source":{"id":"astro-ph/0104316","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0104316","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0104316v1","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0104316","created_at":"2026-05-18T03:47:51Z"},{"alias_kind":"pith_short_12","alias_value":"SSBRYJ6QR7W7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"SSBRYJ6QR7W7KDZY","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"SSBRYJ6Q","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:e100a6db13d42621fba50e833f4ef50dce783290ead0537b655b0d49ed2ea743","target":"graph","created_at":"2026-05-18T03:47:51Z","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":"We present NGC 6221 as a case study of ``X-ray loud composite galaxies,'' which appear similar to starbursts at optical wavelengths and resemble traditional active galactic nuclei in X-rays. The net optical spectrum of NGC 6221 is properly characterized as a starburst galaxy, but in X-rays, NGC 6221 is similar to Seyfert 1 galaxies, exhibiting a power-law continuum spectrum, a broad Fe K alpha line, and continuum variability on timescales of days and years. High-resolution images reveal that the detected active nucleus is relatively weak, not only at optical, but also at near-infrared waveleng","authors_text":"Jr. (JHU), K. A. Weaver (JHU/GSFC), N. A. Levenson (JHU), R. Cid Fernandes, T. M. Heckman (JHU), T. Storchi-Bergmann (UFRGS)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-04-18T23:11:45Z","title":"The Obscuring Starburst of NGC 6221 and Implications for the Hard X-ray Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0104316","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":"sha256:07418b57829ac6b4a1bfd40bad11be851b038f375ae714e40b55d3c63d247913","target":"record","created_at":"2026-05-18T03:47:51Z","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":"e972fe57949d8f7a0b87793b9bfcbdabb15b70cd9fc4772b305e115d1f54fe51","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-04-18T23:11:45Z","title_canon_sha256":"ec1138f4111984b5b5ef75ada27639f7367563cd60bb4f412eecaf361b671230"},"schema_version":"1.0","source":{"id":"astro-ph/0104316","kind":"arxiv","version":1}},"canonical_sha256":"94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94831c27d08fedf50f385964a7ab416f891b967f1e77732b5f3098f1314f1c00","first_computed_at":"2026-05-18T03:47:51.755296Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:51.755296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yi3PF5QbfKFFKZRgrZXMqEIpiXxtFXVIUN8wPy5gXJuGOIczKkzVI2/sLn8iixDYbrvnug86PT+6ML9NPA6yAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:51.755692Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0104316","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07418b57829ac6b4a1bfd40bad11be851b038f375ae714e40b55d3c63d247913","sha256:e100a6db13d42621fba50e833f4ef50dce783290ead0537b655b0d49ed2ea743"],"state_sha256":"d5fa6c7a555ec34bf03a8adcafa19a244a3c8eb8ed4205b8e52ea95ee43ea069"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mdIiWGWwGMQMWqlbb8/8inmvX5VHpeHfNP0INKsgvKg4lUr6csIidVyTWo3om+bXQqZPWGc3cBw+yl1oRT2lDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T12:33:55.793444Z","bundle_sha256":"8c52ddaa82d61dba0ff798402fa8e61dc948b12a866255e1bcb1528c39176e76"}}