{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:AZDVIZ7VXO73OE25JACDBIR5UJ","short_pith_number":"pith:AZDVIZ7V","canonical_record":{"source":{"id":"1508.04420","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-18T19:42:12Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"fc6e4c1875ce753d3308c2f57f4626640d20c043eab87bec0006288772186dff","abstract_canon_sha256":"769b9b286e1fe69487307c9a0dbba6eabfa4d4165a4bdd27c5a4d1f05058dd29"},"schema_version":"1.0"},"canonical_sha256":"06475467f5bbbfb7135d480430a23da2550935704c298fb34cc84a3eae2fed07","source":{"kind":"arxiv","id":"1508.04420","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04420","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04420v2","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04420","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"pith_short_12","alias_value":"AZDVIZ7VXO73","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"AZDVIZ7VXO73OE25","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"AZDVIZ7V","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:AZDVIZ7VXO73OE25JACDBIR5UJ","target":"record","payload":{"canonical_record":{"source":{"id":"1508.04420","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-18T19:42:12Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"fc6e4c1875ce753d3308c2f57f4626640d20c043eab87bec0006288772186dff","abstract_canon_sha256":"769b9b286e1fe69487307c9a0dbba6eabfa4d4165a4bdd27c5a4d1f05058dd29"},"schema_version":"1.0"},"canonical_sha256":"06475467f5bbbfb7135d480430a23da2550935704c298fb34cc84a3eae2fed07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:38.522632Z","signature_b64":"yc6+XZNp729l41NgRLF1dB6+onp96tPJpwXe6CgqDKAFAMUyjDx601ktG7/UnN7XcL9tsM8h4QNQGZwEAwV7CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06475467f5bbbfb7135d480430a23da2550935704c298fb34cc84a3eae2fed07","last_reissued_at":"2026-05-18T01:25:38.521808Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:38.521808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.04420","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":"2026-05-18T01:25:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"21Ls7lD98d6Gd+ds8/oLbYJnZsNUcl7YVL3a492YdKH2N443nGJq3OwBxBhU8Ks8SokzHNgls3YY/6MNhunlDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:44:43.455093Z"},"content_sha256":"b0da52e9e1eba0e1ba3afe327f00900577d556aa13ae34f5553d580b469f6750","schema_version":"1.0","event_id":"sha256:b0da52e9e1eba0e1ba3afe327f00900577d556aa13ae34f5553d580b469f6750"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:AZDVIZ7VXO73OE25JACDBIR5UJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of Broad H$\\alpha$ Emission Lines in the Late-time Spectra of a Hydrogen-poor Superluminous Supernova","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. de Cia (Weizmann), A. Gal-Yam (Weizmann), D. Perley (Copenhagen), E. Ofek (Weizmann), F. Masci (Caltech), G. Leloudas (Weizmann), Lin Yan (Caltech), O. Yaron (Weizmann), P. E. Nugent (LBNL), P. Mazzali (Liverpool), P. R. Wo\\'zniak (Los Alamos), P. Vreeswijk (Weizmann), R. Quimby (SDSU), S. B. Cenko (GSFC), S. R. Kulkarni (Caltech), Umaa D. Rebbapragada (JPL), Y. Cao (Caltech)","submitted_at":"2015-08-18T19:42:12Z","abstract_excerpt":"iPTF13ehe is a hydrogen-poor superluminous supernova (SLSN) at z=0.3434, with a slow-evolving light curve and spectral features similar to SN2007bi. It rises within (83-148)days (rest-frame) to reach a peak bolometric luminosity of 1.3x$10^{44}$erg/s, then decays very slowly at 0.015mag. per day. The measured ejecta velocity is 13000km/s. The inferred explosion characteristics, such as the ejecta mass (67-220$M_\\odot$), the total radiative and kinetic energy ($10^{51}$ & 2x$10^{53}$erg respectively), is typical of a slow-evolving H-poor SLSN event. However, the late-time spectrum taken at +251"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04420","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":"2026-05-18T01:25:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BRgmkHn1eUoro9Q4UIUDLlq7zn7ShES2ZqcDo1tMJYnfRWp+3d7B/CZyZ315gNwbKNLZPuxk4pqPWWE22u7WBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:44:43.455830Z"},"content_sha256":"802abce393135ce9c750542952f7ba1826c52e60d7c319433e2d9d8ffb1da92d","schema_version":"1.0","event_id":"sha256:802abce393135ce9c750542952f7ba1826c52e60d7c319433e2d9d8ffb1da92d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/bundle.json","state_url":"https://pith.science/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/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":"2026-06-09T08:44:43Z","links":{"resolver":"https://pith.science/pith/AZDVIZ7VXO73OE25JACDBIR5UJ","bundle":"https://pith.science/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/bundle.json","state":"https://pith.science/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AZDVIZ7VXO73OE25JACDBIR5UJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AZDVIZ7VXO73OE25JACDBIR5UJ","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":"769b9b286e1fe69487307c9a0dbba6eabfa4d4165a4bdd27c5a4d1f05058dd29","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-18T19:42:12Z","title_canon_sha256":"fc6e4c1875ce753d3308c2f57f4626640d20c043eab87bec0006288772186dff"},"schema_version":"1.0","source":{"id":"1508.04420","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04420","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04420v2","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04420","created_at":"2026-05-18T01:25:38Z"},{"alias_kind":"pith_short_12","alias_value":"AZDVIZ7VXO73","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"AZDVIZ7VXO73OE25","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"AZDVIZ7V","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:802abce393135ce9c750542952f7ba1826c52e60d7c319433e2d9d8ffb1da92d","target":"graph","created_at":"2026-05-18T01:25:38Z","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":"iPTF13ehe is a hydrogen-poor superluminous supernova (SLSN) at z=0.3434, with a slow-evolving light curve and spectral features similar to SN2007bi. It rises within (83-148)days (rest-frame) to reach a peak bolometric luminosity of 1.3x$10^{44}$erg/s, then decays very slowly at 0.015mag. per day. The measured ejecta velocity is 13000km/s. The inferred explosion characteristics, such as the ejecta mass (67-220$M_\\odot$), the total radiative and kinetic energy ($10^{51}$ & 2x$10^{53}$erg respectively), is typical of a slow-evolving H-poor SLSN event. However, the late-time spectrum taken at +251","authors_text":"A. de Cia (Weizmann), A. Gal-Yam (Weizmann), D. Perley (Copenhagen), E. Ofek (Weizmann), F. Masci (Caltech), G. Leloudas (Weizmann), Lin Yan (Caltech), O. Yaron (Weizmann), P. E. Nugent (LBNL), P. Mazzali (Liverpool), P. R. Wo\\'zniak (Los Alamos), P. Vreeswijk (Weizmann), R. Quimby (SDSU), S. B. Cenko (GSFC), S. R. Kulkarni (Caltech), Umaa D. Rebbapragada (JPL), Y. Cao (Caltech)","cross_cats":["astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-18T19:42:12Z","title":"Detection of Broad H$\\alpha$ Emission Lines in the Late-time Spectra of a Hydrogen-poor Superluminous Supernova"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04420","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:b0da52e9e1eba0e1ba3afe327f00900577d556aa13ae34f5553d580b469f6750","target":"record","created_at":"2026-05-18T01:25:38Z","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":"769b9b286e1fe69487307c9a0dbba6eabfa4d4165a4bdd27c5a4d1f05058dd29","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-18T19:42:12Z","title_canon_sha256":"fc6e4c1875ce753d3308c2f57f4626640d20c043eab87bec0006288772186dff"},"schema_version":"1.0","source":{"id":"1508.04420","kind":"arxiv","version":2}},"canonical_sha256":"06475467f5bbbfb7135d480430a23da2550935704c298fb34cc84a3eae2fed07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06475467f5bbbfb7135d480430a23da2550935704c298fb34cc84a3eae2fed07","first_computed_at":"2026-05-18T01:25:38.521808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:38.521808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yc6+XZNp729l41NgRLF1dB6+onp96tPJpwXe6CgqDKAFAMUyjDx601ktG7/UnN7XcL9tsM8h4QNQGZwEAwV7CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:38.522632Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.04420","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0da52e9e1eba0e1ba3afe327f00900577d556aa13ae34f5553d580b469f6750","sha256:802abce393135ce9c750542952f7ba1826c52e60d7c319433e2d9d8ffb1da92d"],"state_sha256":"2a4b4ea299592c461148076e10231f2bb8b1d0dc6f02de9f1d6567bfab4edb40"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0RK1eQHqg6tPUbTXaQg9Z1jmtdzeYQ7wWJhwv0jNh9sqpHMrOnbgafUJ7kuIU29yymptnzB/X4wC1PpvektECg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:44:43.459650Z","bundle_sha256":"3b293fc9059db3f820e2311af30de72831239cb1705b036a11ac9c7c95353643"}}