{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:3NRA7CFBBDW4GHK4KIVTW4VPR7","short_pith_number":"pith:3NRA7CFB","canonical_record":{"source":{"id":"astro-ph/0209623","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-09-30T15:36:59Z","cross_cats_sorted":[],"title_canon_sha256":"3bc94f8fafba85918ea633c29f765ecf58a994e4e26df520aead6f3f9c454099","abstract_canon_sha256":"dc1f502bda4649b008b25fae8ab45cfdc1239681802d593ac01294f817953128"},"schema_version":"1.0"},"canonical_sha256":"db620f88a108edc31d5c522b3b72af8fc8ea8475fe50b3669c1572d01c4810b0","source":{"kind":"arxiv","id":"astro-ph/0209623","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0209623","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0209623v1","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0209623","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"3NRA7CFBBDW4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3NRA7CFBBDW4GHK4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3NRA7CFB","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:3NRA7CFBBDW4GHK4KIVTW4VPR7","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0209623","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-09-30T15:36:59Z","cross_cats_sorted":[],"title_canon_sha256":"3bc94f8fafba85918ea633c29f765ecf58a994e4e26df520aead6f3f9c454099","abstract_canon_sha256":"dc1f502bda4649b008b25fae8ab45cfdc1239681802d593ac01294f817953128"},"schema_version":"1.0"},"canonical_sha256":"db620f88a108edc31d5c522b3b72af8fc8ea8475fe50b3669c1572d01c4810b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:01.166516Z","signature_b64":"iAiUuNhvEY1jJMS9y1zuF/KaHByueZsArHVVu/1qAU0cCCIj2lkJoqtpXVoKS9EpYrAi+koyWlGOGUT4/oHcCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db620f88a108edc31d5c522b3b72af8fc8ea8475fe50b3669c1572d01c4810b0","last_reissued_at":"2026-05-18T04:12:01.166024Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:01.166024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0209623","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":"2026-05-18T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2KkjMdE9C1ddxaX5mYvDkTTGYw1UFsLWwp7LpAfsG8EZ3qzX+N96/Zqw2cf/mD6IUOlXgymQZCYnrxtIBe+xCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:55:45.519651Z"},"content_sha256":"6daec830fee89d327b74dae5e113185312e42fe2511ae45b8adff731d04594af","schema_version":"1.0","event_id":"sha256:6daec830fee89d327b74dae5e113185312e42fe2511ae45b8adff731d04594af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:3NRA7CFBBDW4GHK4KIVTW4VPR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photometry and Spectroscopy of the Type IIP SN 1999em from Outburst to Dust Formation","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.Elmhamdi, A.Pastorello, E.Cappellaro, F.Patat, G.Altavilla, I.J.Danziger, M.Salvo, M.Turatto, N.Chugai, S.Benetti","submitted_at":"2002-09-30T15:36:59Z","abstract_excerpt":"We present photometry and spectra of the type IIP SN1999em in NGC 1637 from several days after the outburst till day 642. An amount of $\\approx 0.02 M_{\\odot}$ of ejected $^{56}$Ni is inferred using the recovered bolometric light curve . The H$\\alpha$ and He I 10830 \\AA lines at the nebular epoch show that the distribution of the bulk of $^{56}$Ni can be represented approximately by a sphere of $^{56}$Ni with a velocity of 1500 km s$^{-1}$, which is shifted towards the far hemisphere by about 400 km s$^{-1}$. The fine structure of the H$\\alpha$ at the photospheric epoch reminiscent of the \"Boc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0209623","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":"2026-05-18T04:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OnS5nfSy2tbzUhKvCon6jCJa7U19RYqYFgdCSujioTTMBpFTCBLiXSUq5OO/DMpuEQ0rydGqG0zGNjvsXYA/Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:55:45.520284Z"},"content_sha256":"8a4b0772ad6d3bf8d5526d38c18162dde80a3c1b94c63ace10f02e75cf9b0512","schema_version":"1.0","event_id":"sha256:8a4b0772ad6d3bf8d5526d38c18162dde80a3c1b94c63ace10f02e75cf9b0512"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/bundle.json","state_url":"https://pith.science/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/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":"2026-05-27T02:55:45Z","links":{"resolver":"https://pith.science/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7","bundle":"https://pith.science/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/bundle.json","state":"https://pith.science/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3NRA7CFBBDW4GHK4KIVTW4VPR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:3NRA7CFBBDW4GHK4KIVTW4VPR7","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":"dc1f502bda4649b008b25fae8ab45cfdc1239681802d593ac01294f817953128","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-09-30T15:36:59Z","title_canon_sha256":"3bc94f8fafba85918ea633c29f765ecf58a994e4e26df520aead6f3f9c454099"},"schema_version":"1.0","source":{"id":"astro-ph/0209623","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0209623","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0209623v1","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0209623","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"3NRA7CFBBDW4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3NRA7CFBBDW4GHK4","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3NRA7CFB","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:8a4b0772ad6d3bf8d5526d38c18162dde80a3c1b94c63ace10f02e75cf9b0512","target":"graph","created_at":"2026-05-18T04:12:01Z","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 photometry and spectra of the type IIP SN1999em in NGC 1637 from several days after the outburst till day 642. An amount of $\\approx 0.02 M_{\\odot}$ of ejected $^{56}$Ni is inferred using the recovered bolometric light curve . The H$\\alpha$ and He I 10830 \\AA lines at the nebular epoch show that the distribution of the bulk of $^{56}$Ni can be represented approximately by a sphere of $^{56}$Ni with a velocity of 1500 km s$^{-1}$, which is shifted towards the far hemisphere by about 400 km s$^{-1}$. The fine structure of the H$\\alpha$ at the photospheric epoch reminiscent of the \"Boc","authors_text":"A.Elmhamdi, A.Pastorello, E.Cappellaro, F.Patat, G.Altavilla, I.J.Danziger, M.Salvo, M.Turatto, N.Chugai, S.Benetti","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-09-30T15:36:59Z","title":"Photometry and Spectroscopy of the Type IIP SN 1999em from Outburst to Dust Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0209623","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":"sha256:6daec830fee89d327b74dae5e113185312e42fe2511ae45b8adff731d04594af","target":"record","created_at":"2026-05-18T04:12:01Z","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":"dc1f502bda4649b008b25fae8ab45cfdc1239681802d593ac01294f817953128","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-09-30T15:36:59Z","title_canon_sha256":"3bc94f8fafba85918ea633c29f765ecf58a994e4e26df520aead6f3f9c454099"},"schema_version":"1.0","source":{"id":"astro-ph/0209623","kind":"arxiv","version":1}},"canonical_sha256":"db620f88a108edc31d5c522b3b72af8fc8ea8475fe50b3669c1572d01c4810b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db620f88a108edc31d5c522b3b72af8fc8ea8475fe50b3669c1572d01c4810b0","first_computed_at":"2026-05-18T04:12:01.166024Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:01.166024Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iAiUuNhvEY1jJMS9y1zuF/KaHByueZsArHVVu/1qAU0cCCIj2lkJoqtpXVoKS9EpYrAi+koyWlGOGUT4/oHcCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:01.166516Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0209623","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6daec830fee89d327b74dae5e113185312e42fe2511ae45b8adff731d04594af","sha256:8a4b0772ad6d3bf8d5526d38c18162dde80a3c1b94c63ace10f02e75cf9b0512"],"state_sha256":"7afaeb6132632ea01b09f578f765e9017a1cc3bd4eb55df6004fa468395ca54d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+r8GasXRfDHey0SvjFKfXUw6G2Ydsx+olgiEhfJ58aoHt/gpfoyADfU7FpyCykV4tt/hXfqwVN7r4kekruaSAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T02:55:45.524447Z","bundle_sha256":"60353bfbfa32139f9d9013d74049a9593e0d6543ffb4abb37868fdb2b72ffa7b"}}