{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:V5R4YP4MW65STOJQBJPVYXA6JM","short_pith_number":"pith:V5R4YP4M","canonical_record":{"source":{"id":"1904.06598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-13T22:40:11Z","cross_cats_sorted":[],"title_canon_sha256":"8552247e3cf09eca0b753d029f109f218289bebe36270de1d3f8179a1a004b4d","abstract_canon_sha256":"ddc49e17fe9c9e6dd5d1344ceaef5a07235d5902ebee8366f17c16cff882cd0d"},"schema_version":"1.0"},"canonical_sha256":"af63cc3f8cb7bb29b9300a5f5c5c1e4b2e389e3f1eb848e5c19862db516227db","source":{"kind":"arxiv","id":"1904.06598","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06598","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06598v1","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06598","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"pith_short_12","alias_value":"V5R4YP4MW65S","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"V5R4YP4MW65STOJQ","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"V5R4YP4M","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:V5R4YP4MW65STOJQBJPVYXA6JM","target":"record","payload":{"canonical_record":{"source":{"id":"1904.06598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-13T22:40:11Z","cross_cats_sorted":[],"title_canon_sha256":"8552247e3cf09eca0b753d029f109f218289bebe36270de1d3f8179a1a004b4d","abstract_canon_sha256":"ddc49e17fe9c9e6dd5d1344ceaef5a07235d5902ebee8366f17c16cff882cd0d"},"schema_version":"1.0"},"canonical_sha256":"af63cc3f8cb7bb29b9300a5f5c5c1e4b2e389e3f1eb848e5c19862db516227db","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:54.368257Z","signature_b64":"hcOrq20a00znQGHQE1q2XfnIbWb2adJ8kbbGGOJWkS/BCrHmJJQfWlK8sXBxmZU93V4rXBx0ee+B/fL2oxTPDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af63cc3f8cb7bb29b9300a5f5c5c1e4b2e389e3f1eb848e5c19862db516227db","last_reissued_at":"2026-05-17T23:44:54.367618Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:54.367618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.06598","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":"2026-05-17T23:44:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HZUCxcyp7h12gA9hlBYt4QZpZ9SV5Lrh6v6bPlX+gK4iHg+HIfqZ3gCi2O6B/iPK6PXZv6GLUVi7jBFmiuPSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:52.144730Z"},"content_sha256":"100b3cc28fd23977ccd489ee9f053e7e16ba038d25b92f0dd5ea47dbe8cc85b1","schema_version":"1.0","event_id":"sha256:100b3cc28fd23977ccd489ee9f053e7e16ba038d25b92f0dd5ea47dbe8cc85b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:V5R4YP4MW65STOJQBJPVYXA6JM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling the Light Curves of the Luminous Type Ic Supernova 2007D","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alexei V. Filippenko, En-Wei Liang, Liang-Duan Liu, Ling-Jun Wang, Long Li, Shan-Qin Wang, Weikang Zheng, Zach Cano, Zi-Gao Dai","submitted_at":"2019-04-13T22:40:11Z","abstract_excerpt":"SN~2007D is a nearby (redshift $z = 0.023146$), luminous Type Ic supernova (SN) having a narrow light curve (LC) and high peak luminosity. Previous research based on the assumption that it was powered by the $^{56}$Ni cascade decay suggested that the inferred $^{56}$Ni mass and the ejecta mass are $\\sim 1.5$M$_{\\odot}$ and $\\sim 3.5$M$_{\\odot}$, respectively. In this paper, we employ some multiband LC models to model the $R$-band LC and the color ($V-R$) evolution of SN~2007D to investigate the possible energy sources powering them. We find that the pure $^{56}$Ni model is disfavored; the mult"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06598","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":"2026-05-17T23:44:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/N3yZlWX2l20vRw1YN66dsiUZu08VKoOexnNreQd+3puGe1Ynrxm+h7LwcAcBn7KTzD/G7H9DjOCisFf6gr5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:52.145354Z"},"content_sha256":"ca97e90bb04c970a41e280f90e11bd29ac2503c540bf0c83341eab32ee1ed96a","schema_version":"1.0","event_id":"sha256:ca97e90bb04c970a41e280f90e11bd29ac2503c540bf0c83341eab32ee1ed96a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V5R4YP4MW65STOJQBJPVYXA6JM/bundle.json","state_url":"https://pith.science/pith/V5R4YP4MW65STOJQBJPVYXA6JM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V5R4YP4MW65STOJQBJPVYXA6JM/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":"2026-05-26T16:54:52Z","links":{"resolver":"https://pith.science/pith/V5R4YP4MW65STOJQBJPVYXA6JM","bundle":"https://pith.science/pith/V5R4YP4MW65STOJQBJPVYXA6JM/bundle.json","state":"https://pith.science/pith/V5R4YP4MW65STOJQBJPVYXA6JM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V5R4YP4MW65STOJQBJPVYXA6JM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:V5R4YP4MW65STOJQBJPVYXA6JM","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":"ddc49e17fe9c9e6dd5d1344ceaef5a07235d5902ebee8366f17c16cff882cd0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-13T22:40:11Z","title_canon_sha256":"8552247e3cf09eca0b753d029f109f218289bebe36270de1d3f8179a1a004b4d"},"schema_version":"1.0","source":{"id":"1904.06598","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06598","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06598v1","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06598","created_at":"2026-05-17T23:44:54Z"},{"alias_kind":"pith_short_12","alias_value":"V5R4YP4MW65S","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"V5R4YP4MW65STOJQ","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"V5R4YP4M","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:ca97e90bb04c970a41e280f90e11bd29ac2503c540bf0c83341eab32ee1ed96a","target":"graph","created_at":"2026-05-17T23:44:54Z","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":"SN~2007D is a nearby (redshift $z = 0.023146$), luminous Type Ic supernova (SN) having a narrow light curve (LC) and high peak luminosity. Previous research based on the assumption that it was powered by the $^{56}$Ni cascade decay suggested that the inferred $^{56}$Ni mass and the ejecta mass are $\\sim 1.5$M$_{\\odot}$ and $\\sim 3.5$M$_{\\odot}$, respectively. In this paper, we employ some multiband LC models to model the $R$-band LC and the color ($V-R$) evolution of SN~2007D to investigate the possible energy sources powering them. We find that the pure $^{56}$Ni model is disfavored; the mult","authors_text":"Alexei V. Filippenko, En-Wei Liang, Liang-Duan Liu, Ling-Jun Wang, Long Li, Shan-Qin Wang, Weikang Zheng, Zach Cano, Zi-Gao Dai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-13T22:40:11Z","title":"Modeling the Light Curves of the Luminous Type Ic Supernova 2007D"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06598","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":"sha256:100b3cc28fd23977ccd489ee9f053e7e16ba038d25b92f0dd5ea47dbe8cc85b1","target":"record","created_at":"2026-05-17T23:44:54Z","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":"ddc49e17fe9c9e6dd5d1344ceaef5a07235d5902ebee8366f17c16cff882cd0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-04-13T22:40:11Z","title_canon_sha256":"8552247e3cf09eca0b753d029f109f218289bebe36270de1d3f8179a1a004b4d"},"schema_version":"1.0","source":{"id":"1904.06598","kind":"arxiv","version":1}},"canonical_sha256":"af63cc3f8cb7bb29b9300a5f5c5c1e4b2e389e3f1eb848e5c19862db516227db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af63cc3f8cb7bb29b9300a5f5c5c1e4b2e389e3f1eb848e5c19862db516227db","first_computed_at":"2026-05-17T23:44:54.367618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:54.367618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hcOrq20a00znQGHQE1q2XfnIbWb2adJ8kbbGGOJWkS/BCrHmJJQfWlK8sXBxmZU93V4rXBx0ee+B/fL2oxTPDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:54.368257Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.06598","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:100b3cc28fd23977ccd489ee9f053e7e16ba038d25b92f0dd5ea47dbe8cc85b1","sha256:ca97e90bb04c970a41e280f90e11bd29ac2503c540bf0c83341eab32ee1ed96a"],"state_sha256":"55a9c588cadcb78310dec4f42ce2454a966428c5b202b29a10396e3f04bbbe2a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EI0D5Hf2Jk4EDWVNL/O01ABB5EK1tsTW70neXl6cfszEZd8mRA0jnL/h7ezZXZYddcvweQki9e0fHbShe0tRAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:54:52.148620Z","bundle_sha256":"e0bb332d1273f24896cee4c5a3d13d885ca415a925d23cb8c03a76b2a6bf9422"}}