{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZSSR7JTKIUGPQB5SO635XXXWC6","short_pith_number":"pith:ZSSR7JTK","canonical_record":{"source":{"id":"0909.3780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-21T17:21:58Z","cross_cats_sorted":[],"title_canon_sha256":"bb20b455819ac71e68901606e4b9630f9babcdcf9e0d625946ff7a6bfff1db31","abstract_canon_sha256":"b59578f90213da447a2f1699722c9910a83ef520e3b3eab31d111295cb5b2089"},"schema_version":"1.0"},"canonical_sha256":"cca51fa66a450cf807b277b7dbdef617a81391712732839609e1e69571cfc545","source":{"kind":"arxiv","id":"0909.3780","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.3780","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"arxiv_version","alias_value":"0909.3780v1","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.3780","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZSSR7JTKIUGP","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZSSR7JTKIUGPQB5S","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZSSR7JTK","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZSSR7JTKIUGPQB5SO635XXXWC6","target":"record","payload":{"canonical_record":{"source":{"id":"0909.3780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-21T17:21:58Z","cross_cats_sorted":[],"title_canon_sha256":"bb20b455819ac71e68901606e4b9630f9babcdcf9e0d625946ff7a6bfff1db31","abstract_canon_sha256":"b59578f90213da447a2f1699722c9910a83ef520e3b3eab31d111295cb5b2089"},"schema_version":"1.0"},"canonical_sha256":"cca51fa66a450cf807b277b7dbdef617a81391712732839609e1e69571cfc545","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:45.793025Z","signature_b64":"18mOT0oTWiAhh53fUi2sfiGs1ERxaoig0JxqLCLYIjTpD9qSojcOYkmi9+I8M4OxcO7ulhcOj4VyhbTHGzrfDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cca51fa66a450cf807b277b7dbdef617a81391712732839609e1e69571cfc545","last_reissued_at":"2026-05-18T02:11:45.792167Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:45.792167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.3780","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":"2026-05-18T02:11:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ywHuIp9xgBIsJ6Q7QGh7La+URg1//XhpmiEeL9avKAiccpJDGU6kmsXIDBIwLZ73VmcpPBhX+i/qwrpaBposBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T22:33:19.979115Z"},"content_sha256":"445889311e82edd491e9da644b1087c63a4d17e5b7ff6c8e04ca46fe662720ac","schema_version":"1.0","event_id":"sha256:445889311e82edd491e9da644b1087c63a4d17e5b7ff6c8e04ca46fe662720ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZSSR7JTKIUGPQB5SO635XXXWC6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extensive optical and near-infrared observations of the nearby, narrow-lined type Ic SN 2007gr: days 5 to 415","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"12), 13), 4, 6), Andrea Pastorello (1), Arkady A. Arkharov (5, Arno Riffeser (11), Carrie Trundle (1), Christoph Ries (11), Deborah J. Hunter (1), Dmitrii Y. Tsvetkov (15), Elisa Di Carlo (7), Enrico Cappellaro (7), Hawaii (15) Sternberg Astronomical Institute), Hripsime Navasardyan (4), Johan U. Fynbo (10), Luca Rizzi (14), Massimo Turatto (4), Mauro Dolci (7), Milena Bufano (7), Nancy Elias-Rosa (8), Paolo Mazzali (3, Peter Laursen (10), Peter Meikle (2), Pisa (14) JAC, Rubina Kotak (1), Silona Wilke (11) ((1) Queen's University Belfast, Soeren Frandsen (9), Stefano Benetti (4), Stefano Valenti (1), Stefan Taubenberger (3), Steven J. Smartt (1), UK (2) Imperial College London, UK (3) MPA Garching (4) INAF Padova (5) Pulkovo Central Astronomical Observatory (6) Astronomical Institute of St Petersburg (7) INAF Teramo (8) Spitzer Science Centre (9) Arhus University (10) Dark Cosmology Centre (11) University of Munich (12) MPE Garching (13) Scuola Normale Superiore, Ulrich Hopp (11, Valeri M. Larionov (5, Vallery Stanishev (4)","submitted_at":"2009-09-21T17:21:58Z","abstract_excerpt":"We present photometric and spectroscopic observations at optical and near-infrared wavelengths of the nearby type Ic SN 2007gr. These represent the most extensive data-set to date of any supernova of this sub-type, with frequent coverage from shortly after discovery to more than one year post-explosion. We deduce a rise time to B-band maximum of 11.5 \\pm 2.7 days. We find a peak B-band magnitude of M_B=-16.8, and light curves which are remarkably similar to the so-called 'hypernova' SN 2002ap. In contrast, the spectra of SNe 2007gr and 2002ap show marked differences, not least in their respect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.3780","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":"2026-05-18T02:11:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GvThI1EMFIIzCTmcyTyoGZLVoMNONx/3OVrW9BQi5bmZA4hQPPdLmY2l2rLUzhSwDyc5CiY7R7F+yD2ITvxIDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T22:33:19.979842Z"},"content_sha256":"6321468d1a6ce785d79cbd151c830c39bf5b56b97b04bf33f2bbe4c405468692","schema_version":"1.0","event_id":"sha256:6321468d1a6ce785d79cbd151c830c39bf5b56b97b04bf33f2bbe4c405468692"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/bundle.json","state_url":"https://pith.science/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/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":"2026-05-20T22:33:19Z","links":{"resolver":"https://pith.science/pith/ZSSR7JTKIUGPQB5SO635XXXWC6","bundle":"https://pith.science/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/bundle.json","state":"https://pith.science/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZSSR7JTKIUGPQB5SO635XXXWC6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZSSR7JTKIUGPQB5SO635XXXWC6","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":"b59578f90213da447a2f1699722c9910a83ef520e3b3eab31d111295cb5b2089","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-21T17:21:58Z","title_canon_sha256":"bb20b455819ac71e68901606e4b9630f9babcdcf9e0d625946ff7a6bfff1db31"},"schema_version":"1.0","source":{"id":"0909.3780","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.3780","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"arxiv_version","alias_value":"0909.3780v1","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.3780","created_at":"2026-05-18T02:11:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZSSR7JTKIUGP","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZSSR7JTKIUGPQB5S","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZSSR7JTK","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:6321468d1a6ce785d79cbd151c830c39bf5b56b97b04bf33f2bbe4c405468692","target":"graph","created_at":"2026-05-18T02:11:45Z","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 photometric and spectroscopic observations at optical and near-infrared wavelengths of the nearby type Ic SN 2007gr. These represent the most extensive data-set to date of any supernova of this sub-type, with frequent coverage from shortly after discovery to more than one year post-explosion. We deduce a rise time to B-band maximum of 11.5 \\pm 2.7 days. We find a peak B-band magnitude of M_B=-16.8, and light curves which are remarkably similar to the so-called 'hypernova' SN 2002ap. In contrast, the spectra of SNe 2007gr and 2002ap show marked differences, not least in their respect","authors_text":"12), 13), 4, 6), Andrea Pastorello (1), Arkady A. Arkharov (5, Arno Riffeser (11), Carrie Trundle (1), Christoph Ries (11), Deborah J. Hunter (1), Dmitrii Y. Tsvetkov (15), Elisa Di Carlo (7), Enrico Cappellaro (7), Hawaii (15) Sternberg Astronomical Institute), Hripsime Navasardyan (4), Johan U. Fynbo (10), Luca Rizzi (14), Massimo Turatto (4), Mauro Dolci (7), Milena Bufano (7), Nancy Elias-Rosa (8), Paolo Mazzali (3, Peter Laursen (10), Peter Meikle (2), Pisa (14) JAC, Rubina Kotak (1), Silona Wilke (11) ((1) Queen's University Belfast, Soeren Frandsen (9), Stefano Benetti (4), Stefano Valenti (1), Stefan Taubenberger (3), Steven J. Smartt (1), UK (2) Imperial College London, UK (3) MPA Garching (4) INAF Padova (5) Pulkovo Central Astronomical Observatory (6) Astronomical Institute of St Petersburg (7) INAF Teramo (8) Spitzer Science Centre (9) Arhus University (10) Dark Cosmology Centre (11) University of Munich (12) MPE Garching (13) Scuola Normale Superiore, Ulrich Hopp (11, Valeri M. Larionov (5, Vallery Stanishev (4)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-21T17:21:58Z","title":"Extensive optical and near-infrared observations of the nearby, narrow-lined type Ic SN 2007gr: days 5 to 415"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.3780","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":"sha256:445889311e82edd491e9da644b1087c63a4d17e5b7ff6c8e04ca46fe662720ac","target":"record","created_at":"2026-05-18T02:11:45Z","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":"b59578f90213da447a2f1699722c9910a83ef520e3b3eab31d111295cb5b2089","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-21T17:21:58Z","title_canon_sha256":"bb20b455819ac71e68901606e4b9630f9babcdcf9e0d625946ff7a6bfff1db31"},"schema_version":"1.0","source":{"id":"0909.3780","kind":"arxiv","version":1}},"canonical_sha256":"cca51fa66a450cf807b277b7dbdef617a81391712732839609e1e69571cfc545","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cca51fa66a450cf807b277b7dbdef617a81391712732839609e1e69571cfc545","first_computed_at":"2026-05-18T02:11:45.792167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:45.792167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"18mOT0oTWiAhh53fUi2sfiGs1ERxaoig0JxqLCLYIjTpD9qSojcOYkmi9+I8M4OxcO7ulhcOj4VyhbTHGzrfDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:45.793025Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.3780","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:445889311e82edd491e9da644b1087c63a4d17e5b7ff6c8e04ca46fe662720ac","sha256:6321468d1a6ce785d79cbd151c830c39bf5b56b97b04bf33f2bbe4c405468692"],"state_sha256":"ab86dca18c8ee175c542a719aef9bb20f7a7816ac9e45853488503d40a215d0a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PWmUjUF6E17fX41Uv3AqKR/a78B4OudiJzduYgz5vKmPZt96Pamq2bMcHSPgXdvOPHtZzT0hjbptta06tQ6IBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T22:33:19.983871Z","bundle_sha256":"15d91369490eccb23947fb4eda857986aef6a0f23ebfb9df160a8c8be592b0fa"}}