{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:RE4INFXD2H5N637JQVUYRLFE5E","short_pith_number":"pith:RE4INFXD","canonical_record":{"source":{"id":"1504.06668","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-24T23:41:19Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"0969bac53969f506d2b767bc0f22300f92cabebd0250597d1caf32c44b681d3a","abstract_canon_sha256":"b46962b1b23efc07eb040af4583d06443019c372dba86f9bf39e8efff8168f5a"},"schema_version":"1.0"},"canonical_sha256":"89388696e3d1fadf6fe9856988aca4e918cae7cfe331bede2ffd524794d02e48","source":{"kind":"arxiv","id":"1504.06668","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06668","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06668v2","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06668","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"RE4INFXD2H5N","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RE4INFXD2H5N637J","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RE4INFXD","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:RE4INFXD2H5N637JQVUYRLFE5E","target":"record","payload":{"canonical_record":{"source":{"id":"1504.06668","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-24T23:41:19Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"0969bac53969f506d2b767bc0f22300f92cabebd0250597d1caf32c44b681d3a","abstract_canon_sha256":"b46962b1b23efc07eb040af4583d06443019c372dba86f9bf39e8efff8168f5a"},"schema_version":"1.0"},"canonical_sha256":"89388696e3d1fadf6fe9856988aca4e918cae7cfe331bede2ffd524794d02e48","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:32.424481Z","signature_b64":"8sCV5gwhrg2YtU4DL0/NJuoNx5Xm+7IovrtlfJ9UU/No51ZMx4qoBMMiO2d3XBHdZNkg0p5/WuNgrdB/0iaCBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"89388696e3d1fadf6fe9856988aca4e918cae7cfe331bede2ffd524794d02e48","last_reissued_at":"2026-05-18T02:03:32.423713Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:32.423713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.06668","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":"2026-05-18T02:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y4sFA13zpXH2YACcCdlQqMoSo8YzH2J8C/9QnzkFLuMc+snnyCK4IuK7uluy6Su4ulm32///7YmKN80JaLNuBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:15:49.970527Z"},"content_sha256":"880c00e551b7e916f65629bcee9c4472bc56fea6ed990478ed1aa2b523a14119","schema_version":"1.0","event_id":"sha256:880c00e551b7e916f65629bcee9c4472bc56fea6ed990478ed1aa2b523a14119"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:RE4INFXD2H5N637JQVUYRLFE5E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Type IIb Supernova 2013df Entering Into An Interaction Phase: A Link between the Progenitor and the Mass Loss","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Kamble, A. Soderberg, A. Suzuki, A. Tajitsu, D. Milisavljevic, G. Folatelli, H. Kuncarayakti, I. Sakon, J.D. Simon, J.H. Kim, J. Parrent, K. Maeda, K. Nomoto, K.S. Kawabata, K. Takaki, M. Ishigaki, M. Iye, M. Kawabata, M.M. Phillips, M.R. Drout, M. Tanaka, M. Yamanaka, R. Margutti, T. Hattori, T.J. Moriya, T. Nakaoka","submitted_at":"2015-04-24T23:41:19Z","abstract_excerpt":"We report the late-time evolution of Type IIb Supernova (SN IIb) 2013df. SN 2013df showed a dramatic change in its spectral features at ~1 year after the explosion. Early on it showed typical characteristics shared by SNe IIb/Ib/Ic dominated by metal emission lines, while later on it was dominated by broad and flat-topped Halpha and He I emissions. The late-time spectra are strikingly similar to SN IIb 1993J, which is the only previous example clearly showing the same transition. This late-time evolution is fully explained by a change in the energy input from the $^{56}$Co decay to the interac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06668","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":"2026-05-18T02:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C+2oAC1oc92Z6aeKQvotjHYyqiANb90YdarWvvIcxtikSpyPGDGBLSZMUHx44rA1zcd4qrE9Hq7mGrXxCFXrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T01:15:49.970876Z"},"content_sha256":"d31d75f02943b18519169f36cdf1e783c9169b18353692c949ea23f8c0b446f7","schema_version":"1.0","event_id":"sha256:d31d75f02943b18519169f36cdf1e783c9169b18353692c949ea23f8c0b446f7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RE4INFXD2H5N637JQVUYRLFE5E/bundle.json","state_url":"https://pith.science/pith/RE4INFXD2H5N637JQVUYRLFE5E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RE4INFXD2H5N637JQVUYRLFE5E/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":"2026-05-28T01:15:49Z","links":{"resolver":"https://pith.science/pith/RE4INFXD2H5N637JQVUYRLFE5E","bundle":"https://pith.science/pith/RE4INFXD2H5N637JQVUYRLFE5E/bundle.json","state":"https://pith.science/pith/RE4INFXD2H5N637JQVUYRLFE5E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RE4INFXD2H5N637JQVUYRLFE5E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RE4INFXD2H5N637JQVUYRLFE5E","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":"b46962b1b23efc07eb040af4583d06443019c372dba86f9bf39e8efff8168f5a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-24T23:41:19Z","title_canon_sha256":"0969bac53969f506d2b767bc0f22300f92cabebd0250597d1caf32c44b681d3a"},"schema_version":"1.0","source":{"id":"1504.06668","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06668","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06668v2","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06668","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"RE4INFXD2H5N","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RE4INFXD2H5N637J","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RE4INFXD","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:d31d75f02943b18519169f36cdf1e783c9169b18353692c949ea23f8c0b446f7","target":"graph","created_at":"2026-05-18T02:03:32Z","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 report the late-time evolution of Type IIb Supernova (SN IIb) 2013df. SN 2013df showed a dramatic change in its spectral features at ~1 year after the explosion. Early on it showed typical characteristics shared by SNe IIb/Ib/Ic dominated by metal emission lines, while later on it was dominated by broad and flat-topped Halpha and He I emissions. The late-time spectra are strikingly similar to SN IIb 1993J, which is the only previous example clearly showing the same transition. This late-time evolution is fully explained by a change in the energy input from the $^{56}$Co decay to the interac","authors_text":"A. Kamble, A. Soderberg, A. Suzuki, A. Tajitsu, D. Milisavljevic, G. Folatelli, H. Kuncarayakti, I. Sakon, J.D. Simon, J.H. Kim, J. Parrent, K. Maeda, K. Nomoto, K.S. Kawabata, K. Takaki, M. Ishigaki, M. Iye, M. Kawabata, M.M. Phillips, M.R. Drout, M. Tanaka, M. Yamanaka, R. Margutti, T. Hattori, T.J. Moriya, T. Nakaoka","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-24T23:41:19Z","title":"Type IIb Supernova 2013df Entering Into An Interaction Phase: A Link between the Progenitor and the Mass Loss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06668","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":"sha256:880c00e551b7e916f65629bcee9c4472bc56fea6ed990478ed1aa2b523a14119","target":"record","created_at":"2026-05-18T02:03:32Z","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":"b46962b1b23efc07eb040af4583d06443019c372dba86f9bf39e8efff8168f5a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-24T23:41:19Z","title_canon_sha256":"0969bac53969f506d2b767bc0f22300f92cabebd0250597d1caf32c44b681d3a"},"schema_version":"1.0","source":{"id":"1504.06668","kind":"arxiv","version":2}},"canonical_sha256":"89388696e3d1fadf6fe9856988aca4e918cae7cfe331bede2ffd524794d02e48","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89388696e3d1fadf6fe9856988aca4e918cae7cfe331bede2ffd524794d02e48","first_computed_at":"2026-05-18T02:03:32.423713Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:32.423713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8sCV5gwhrg2YtU4DL0/NJuoNx5Xm+7IovrtlfJ9UU/No51ZMx4qoBMMiO2d3XBHdZNkg0p5/WuNgrdB/0iaCBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:32.424481Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.06668","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:880c00e551b7e916f65629bcee9c4472bc56fea6ed990478ed1aa2b523a14119","sha256:d31d75f02943b18519169f36cdf1e783c9169b18353692c949ea23f8c0b446f7"],"state_sha256":"9145d740c719e8ba1f8959ab40314b62621bd3bd00a0d1534978e54b9c8a2fc5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5FgPUr81w29wtezb/KRuSnuYynLrvMj4+lrF0P/fkIACd4rzz4/eBngfV1swta3YwVzwEiSyyQiobvBIU5AjAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T01:15:49.972896Z","bundle_sha256":"35adaf0f2a4432a88fccee63ee88dca86ab554a616bca4ba55e2081490ac4405"}}