{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:KL4SBMA6TC2Y4YOWBYLIMWDIFN","short_pith_number":"pith:KL4SBMA6","canonical_record":{"source":{"id":"astro-ph/0405626","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-31T14:40:59Z","cross_cats_sorted":[],"title_canon_sha256":"f9dd88be44cb3bbfe6934f04c12c7c3f46440bb3b3e34c65a9ae32eb9dfbdebb","abstract_canon_sha256":"b22c75295938ca11c307ec83365eae15bf2a41674c5a757a0f8c8bbb43942377"},"schema_version":"1.0"},"canonical_sha256":"52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771","source":{"kind":"arxiv","id":"astro-ph/0405626","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405626","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405626v2","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405626","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"KL4SBMA6TC2Y","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"KL4SBMA6TC2Y4YOW","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"KL4SBMA6","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:KL4SBMA6TC2Y4YOWBYLIMWDIFN","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0405626","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-31T14:40:59Z","cross_cats_sorted":[],"title_canon_sha256":"f9dd88be44cb3bbfe6934f04c12c7c3f46440bb3b3e34c65a9ae32eb9dfbdebb","abstract_canon_sha256":"b22c75295938ca11c307ec83365eae15bf2a41674c5a757a0f8c8bbb43942377"},"schema_version":"1.0"},"canonical_sha256":"52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:43.700992Z","signature_b64":"oT5chG6ZO0cBbmWs/9npRxasa5NHsZRAiyx+yDPjXLgq8lnI79wKqBSBVYguPqKNIJV8LqdN2gU0/L0CleG5BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771","last_reissued_at":"2026-05-18T03:47:43.700305Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:43.700305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0405626","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V+PgZmHhIZ8I0TB01vCtOE8ww4H1/B5PFSvQwCyWJfR4yURuA10ipYJt0KhMJphOTxufmzI1Mup8EbPbHHI7Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:58:42.642624Z"},"content_sha256":"4ad5a31c1d20f9b45871b3d7abab60d30c99c831aee4bae348aec8b336550ec6","schema_version":"1.0","event_id":"sha256:4ad5a31c1d20f9b45871b3d7abab60d30c99c831aee4bae348aec8b336550ec6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:KL4SBMA6TC2Y4YOWBYLIMWDIFN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IRAC Observations of M81","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B.T. Draine, D.A. Dale, D. Calzetti, D. Frayer, G.G. Fazio, G. Helou, H.A. Smith, Jr., L. Storrie-Lombardi, M.D. Thornley, M.L.N. Ashby, M. Pahre, M.W. Regan, P. Barmby, P.N. Appleton, R.C. Kennicutt, S. Malhotra, S.P. Willner, S. Stolovy","submitted_at":"2004-05-31T14:40:59Z","abstract_excerpt":"IRAC images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405626","kind":"arxiv","version":2},"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":"2026-05-18T03:47:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P+IPqp/UWhjzoFT+4nKaGbhehgVhtGQsQrton5Toshu6RqRomrECiPQp/sn6R6CfBTIkowvoPh/0AWUVJMpxBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:58:42.643345Z"},"content_sha256":"47504bdec840c65a34d82c7359f8917f15339280bd4e8a46d10045c3df2713da","schema_version":"1.0","event_id":"sha256:47504bdec840c65a34d82c7359f8917f15339280bd4e8a46d10045c3df2713da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/bundle.json","state_url":"https://pith.science/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/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":"2026-05-25T11:58:42Z","links":{"resolver":"https://pith.science/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN","bundle":"https://pith.science/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/bundle.json","state":"https://pith.science/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KL4SBMA6TC2Y4YOWBYLIMWDIFN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:KL4SBMA6TC2Y4YOWBYLIMWDIFN","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":"b22c75295938ca11c307ec83365eae15bf2a41674c5a757a0f8c8bbb43942377","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-31T14:40:59Z","title_canon_sha256":"f9dd88be44cb3bbfe6934f04c12c7c3f46440bb3b3e34c65a9ae32eb9dfbdebb"},"schema_version":"1.0","source":{"id":"astro-ph/0405626","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405626","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405626v2","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405626","created_at":"2026-05-18T03:47:43Z"},{"alias_kind":"pith_short_12","alias_value":"KL4SBMA6TC2Y","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"KL4SBMA6TC2Y4YOW","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"KL4SBMA6","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:47504bdec840c65a34d82c7359f8917f15339280bd4e8a46d10045c3df2713da","target":"graph","created_at":"2026-05-18T03:47:43Z","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":"IRAC images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presu","authors_text":"B.T. Draine, D.A. Dale, D. Calzetti, D. Frayer, G.G. Fazio, G. Helou, H.A. Smith, Jr., L. Storrie-Lombardi, M.D. Thornley, M.L.N. Ashby, M. Pahre, M.W. Regan, P. Barmby, P.N. Appleton, R.C. Kennicutt, S. Malhotra, S.P. Willner, S. Stolovy","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-05-31T14:40:59Z","title":"IRAC Observations of M81"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405626","kind":"arxiv","version":2},"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":"sha256:4ad5a31c1d20f9b45871b3d7abab60d30c99c831aee4bae348aec8b336550ec6","target":"record","created_at":"2026-05-18T03:47:43Z","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":"b22c75295938ca11c307ec83365eae15bf2a41674c5a757a0f8c8bbb43942377","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-31T14:40:59Z","title_canon_sha256":"f9dd88be44cb3bbfe6934f04c12c7c3f46440bb3b3e34c65a9ae32eb9dfbdebb"},"schema_version":"1.0","source":{"id":"astro-ph/0405626","kind":"arxiv","version":2}},"canonical_sha256":"52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52f920b01e98b58e61d60e168658682b6e1492d16faaa6ef5378c099ef992771","first_computed_at":"2026-05-18T03:47:43.700305Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:43.700305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oT5chG6ZO0cBbmWs/9npRxasa5NHsZRAiyx+yDPjXLgq8lnI79wKqBSBVYguPqKNIJV8LqdN2gU0/L0CleG5BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:43.700992Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0405626","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ad5a31c1d20f9b45871b3d7abab60d30c99c831aee4bae348aec8b336550ec6","sha256:47504bdec840c65a34d82c7359f8917f15339280bd4e8a46d10045c3df2713da"],"state_sha256":"e10969b63abaff961df50f768f32191a96d5905c4636865e6a45cf8af1f6e2a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GhTmWB2ouNOEEgMJFuvDxLpsALk+nY1voHy5JAaf3ROXW4jdRxZ+Qbefak/Nxu95a0ND0Co+myuskRMiw++SAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T11:58:42.646547Z","bundle_sha256":"60bec778b68d6f69034f6b57095649ee80c24d84f3080011d1347eb3cc78f0da"}}