{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:TT6F2B6Y6CEYK43WYLWH6GVINZ","short_pith_number":"pith:TT6F2B6Y","canonical_record":{"source":{"id":"2201.06991","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-18T13:54:30Z","cross_cats_sorted":[],"title_canon_sha256":"4637688172b0effe47da79b54c8c26f1003d19e72bb7bdcb841aeab252c5c96e","abstract_canon_sha256":"0d702d3cf9a8a0e0fb27f049b606baeb7828aba049183120f0ccc842e54ae064"},"schema_version":"1.0"},"canonical_sha256":"9cfc5d07d8f089857376c2ec7f1aa86e4ada7c65b8219abe2a5e96f066f46715","source":{"kind":"arxiv","id":"2201.06991","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.06991","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2201.06991v1","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.06991","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"TT6F2B6Y6CEY","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"TT6F2B6Y6CEYK43W","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"TT6F2B6Y","created_at":"2026-07-05T03:49:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:TT6F2B6Y6CEYK43WYLWH6GVINZ","target":"record","payload":{"canonical_record":{"source":{"id":"2201.06991","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-18T13:54:30Z","cross_cats_sorted":[],"title_canon_sha256":"4637688172b0effe47da79b54c8c26f1003d19e72bb7bdcb841aeab252c5c96e","abstract_canon_sha256":"0d702d3cf9a8a0e0fb27f049b606baeb7828aba049183120f0ccc842e54ae064"},"schema_version":"1.0"},"canonical_sha256":"9cfc5d07d8f089857376c2ec7f1aa86e4ada7c65b8219abe2a5e96f066f46715","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:49:33.476900Z","signature_b64":"qeFz1rbIFpuukd2ns94+1VztBHzR+PcEn4oaR3dwSgjrNm1+7aTUHoE26TK1lz8NU970zZtpjIGf4UlTVKNdBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9cfc5d07d8f089857376c2ec7f1aa86e4ada7c65b8219abe2a5e96f066f46715","last_reissued_at":"2026-07-05T03:49:33.476493Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:49:33.476493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.06991","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":"2026-07-05T03:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VX6+UGh+a0CM5E9AE8DC0w10QXDdiIVWDooEnjdPu8DspSq5u3uYaL+uTEct+ID7xug21BOPwlUy9lFfcDLADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:52:49.056255Z"},"content_sha256":"0bce534c6be0dba1fe18cd3f90c427015c4b4f7fef169c44c0906ebb865bebf9","schema_version":"1.0","event_id":"sha256:0bce534c6be0dba1fe18cd3f90c427015c4b4f7fef169c44c0906ebb865bebf9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:TT6F2B6Y6CEYK43WYLWH6GVINZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SN 2020acat: A purr-fect example of a fast rising Type IIb Supernova","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Pastorello, A. Requitti, C. Ashall, C. Inserra, C. McCully, C. Pellegrino, D. A. Howell, D. Hiramatsu, D. R. Young, E. Padilla Gonzalez, E. Paraskeva, G. Terreran, I. Arcavi, J. Burke, J.P. Anderson, J. Teffs, K. A. Bostroem, K. Medler, L. Galbany, L. Tomasella, M. Ergon, M. Gromadzki, M. Newsome, M. Nicholl, N. Elias-Rosa, P. A. Mazzali, P. Charalampopoulos, P. J. Pessi, P. Lundqvist, R. Roy, S. Benetti, T. M. Reynolds, T. M\\\"uller-Bravo, Y.-Z. Cai","submitted_at":"2022-01-18T13:54:30Z","abstract_excerpt":"The Ultra-Violet (UV) and Near Infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering $\\sim \\! \\! 250$ days after explosion are presented here. Using the fast rising photometric observations, spanning from the UV to NIR wavelengths, a pseudo-bolometric light curve was constructed and compared to several other well-observed Type IIb supernovae (SNe IIb). SN 2020acat displayed a very short rise time reaching a peak luminosity of $\\mathrm{Log_{10}}(L) = 42.49 \\pm 0.15 \\, \\mathrm{erg \\, s^{-1}}$ in only $\\sim \\! \\! 14.6 \\pm 0.3$ days. From modelling of the pseudo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.06991","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/2201.06991/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":"2026-07-05T03:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ps25iNMYRQlttazTENFpqe3SEnwioM3KwoLHj3BsdUxMHo6JiURYWya3NMgaYD1DmmXt4St89QcACGa1FQaaCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:52:49.057388Z"},"content_sha256":"1e465f4b44534d81d7c0cee73acd6ccbe70ef28fd630cfa4e027c65fe9487855","schema_version":"1.0","event_id":"sha256:1e465f4b44534d81d7c0cee73acd6ccbe70ef28fd630cfa4e027c65fe9487855"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/bundle.json","state_url":"https://pith.science/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/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":"2026-08-03T16:52:49Z","links":{"resolver":"https://pith.science/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ","bundle":"https://pith.science/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/bundle.json","state":"https://pith.science/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TT6F2B6Y6CEYK43WYLWH6GVINZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:TT6F2B6Y6CEYK43WYLWH6GVINZ","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":"0d702d3cf9a8a0e0fb27f049b606baeb7828aba049183120f0ccc842e54ae064","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-18T13:54:30Z","title_canon_sha256":"4637688172b0effe47da79b54c8c26f1003d19e72bb7bdcb841aeab252c5c96e"},"schema_version":"1.0","source":{"id":"2201.06991","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.06991","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2201.06991v1","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.06991","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"TT6F2B6Y6CEY","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"TT6F2B6Y6CEYK43W","created_at":"2026-07-05T03:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"TT6F2B6Y","created_at":"2026-07-05T03:49:33Z"}],"graph_snapshots":[{"event_id":"sha256:1e465f4b44534d81d7c0cee73acd6ccbe70ef28fd630cfa4e027c65fe9487855","target":"graph","created_at":"2026-07-05T03:49:33Z","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/2201.06991/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Ultra-Violet (UV) and Near Infrared (NIR) photometric and optical spectroscopic observations of SN 2020acat covering $\\sim \\! \\! 250$ days after explosion are presented here. Using the fast rising photometric observations, spanning from the UV to NIR wavelengths, a pseudo-bolometric light curve was constructed and compared to several other well-observed Type IIb supernovae (SNe IIb). SN 2020acat displayed a very short rise time reaching a peak luminosity of $\\mathrm{Log_{10}}(L) = 42.49 \\pm 0.15 \\, \\mathrm{erg \\, s^{-1}}$ in only $\\sim \\! \\! 14.6 \\pm 0.3$ days. From modelling of the pseudo","authors_text":"A. Pastorello, A. Requitti, C. Ashall, C. Inserra, C. McCully, C. Pellegrino, D. A. Howell, D. Hiramatsu, D. R. Young, E. Padilla Gonzalez, E. Paraskeva, G. Terreran, I. Arcavi, J. Burke, J.P. Anderson, J. Teffs, K. A. Bostroem, K. Medler, L. Galbany, L. Tomasella, M. Ergon, M. Gromadzki, M. Newsome, M. Nicholl, N. Elias-Rosa, P. A. Mazzali, P. Charalampopoulos, P. J. Pessi, P. Lundqvist, R. Roy, S. Benetti, T. M. Reynolds, T. M\\\"uller-Bravo, Y.-Z. Cai","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-18T13:54:30Z","title":"SN 2020acat: A purr-fect example of a fast rising Type IIb Supernova"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.06991","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":"sha256:0bce534c6be0dba1fe18cd3f90c427015c4b4f7fef169c44c0906ebb865bebf9","target":"record","created_at":"2026-07-05T03:49:33Z","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":"0d702d3cf9a8a0e0fb27f049b606baeb7828aba049183120f0ccc842e54ae064","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-18T13:54:30Z","title_canon_sha256":"4637688172b0effe47da79b54c8c26f1003d19e72bb7bdcb841aeab252c5c96e"},"schema_version":"1.0","source":{"id":"2201.06991","kind":"arxiv","version":1}},"canonical_sha256":"9cfc5d07d8f089857376c2ec7f1aa86e4ada7c65b8219abe2a5e96f066f46715","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9cfc5d07d8f089857376c2ec7f1aa86e4ada7c65b8219abe2a5e96f066f46715","first_computed_at":"2026-07-05T03:49:33.476493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:49:33.476493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qeFz1rbIFpuukd2ns94+1VztBHzR+PcEn4oaR3dwSgjrNm1+7aTUHoE26TK1lz8NU970zZtpjIGf4UlTVKNdBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:49:33.476900Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.06991","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0bce534c6be0dba1fe18cd3f90c427015c4b4f7fef169c44c0906ebb865bebf9","sha256:1e465f4b44534d81d7c0cee73acd6ccbe70ef28fd630cfa4e027c65fe9487855"],"state_sha256":"e1b443b7f513b201b49c79049881b006f4e263454776b2c7416b55944e496037"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MoTT4/Sr5fFKsyqSVnbes+X1tk4hiGpkFxdu51lYG6KVbd/rugKvElfq8zhd3jw2/Gj8XySIb06a8VL+aLVmAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:52:49.064755Z","bundle_sha256":"ea301887c7222d68a77bcbfb84ae4128d2c46696be595ecaaf5aa370275cc540"}}