{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3U3G5R7NYTGLBZJEC7XZYBQDWS","short_pith_number":"pith:3U3G5R7N","canonical_record":{"source":{"id":"1606.05465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-17T09:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"64bb8d03bcee7c97bcfe95a637eb9e61f12c6fa91d02b0ed49c4adaa3e06b40a","abstract_canon_sha256":"e1d9875ce79458b19c354cce7ad7b46074038c45cea5f6b4505fd44214f4f009"},"schema_version":"1.0"},"canonical_sha256":"dd366ec7edc4ccb0e52417ef9c0603b48fb3917d0ce0ed7722b5ffbd92ea648a","source":{"kind":"arxiv","id":"1606.05465","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.05465","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1606.05465v2","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.05465","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"3U3G5R7NYTGL","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_16","alias_value":"3U3G5R7NYTGLBZJE","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_8","alias_value":"3U3G5R7N","created_at":"2026-07-05T00:45:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3U3G5R7NYTGLBZJEC7XZYBQDWS","target":"record","payload":{"canonical_record":{"source":{"id":"1606.05465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-17T09:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"64bb8d03bcee7c97bcfe95a637eb9e61f12c6fa91d02b0ed49c4adaa3e06b40a","abstract_canon_sha256":"e1d9875ce79458b19c354cce7ad7b46074038c45cea5f6b4505fd44214f4f009"},"schema_version":"1.0"},"canonical_sha256":"dd366ec7edc4ccb0e52417ef9c0603b48fb3917d0ce0ed7722b5ffbd92ea648a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:45:48.744498Z","signature_b64":"y11OofQQSDq3mpo8E+JkSgtbF3mW/LUUE1Lp04hRJeLpaNCEDPjWNO2VZyhqZdMPYerMmfwFkkOoPv0+3/Z+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd366ec7edc4ccb0e52417ef9c0603b48fb3917d0ce0ed7722b5ffbd92ea648a","last_reissued_at":"2026-07-05T00:45:48.744100Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:45:48.744100Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.05465","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":"2026-07-05T00:45:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HDopVPmp/eDjwjTh6ttiTw2t3opjkgl2FtvJ04qI/A7IKewkXNHgCXpEVnp5rEmEVadb2tu0m6C0tQ65j5sbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T15:46:51.688556Z"},"content_sha256":"f128601d90c664439e47a039f5e95adcf83bb5d78e47634bd191c42be8e8ce98","schema_version":"1.0","event_id":"sha256:f128601d90c664439e47a039f5e95adcf83bb5d78e47634bd191c42be8e8ce98"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3U3G5R7NYTGLBZJEC7XZYBQDWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectropolarimetry of the Type IIb SN 2008aq","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Clocchiatti, D. Baade, F. Patat, H.F. Stevance, J.C. Wheeler, J.R. Maund, J. Spyromilio, L. Wang, P. Hoflich, P. Zelaya, Y. Yang","submitted_at":"2016-06-17T09:58:30Z","abstract_excerpt":"We present optical spectroscopy and spectropolarimetry of the Type IIb SN 2008aq 16 days and 27 days post-explosion. The spectrum of SN 2008aq remained dominated by Halpha P Cygni profile at both epochs, but showed a significant increase in the strength of the helium features, which is characteristic of the transition undergone by supernovae between Type IIb and Type Ib. Comparison of the spectra of SN 2008aq to other Type IIb SNe (SN 1993J, SN 2011dh, and SN 2008ax) at similar epochs revealed that the helium lines in SN 2008aq are much weaker, suggesting that its progenitor was stripped to a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.05465","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1606.05465/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":"2026-07-05T00:45:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YGgS2TUN3Sn3fC6dKfu7wc0Hv9Q8MT4r4Nw6nQBMCsTjGtuaB47s57dLwLmGsnb4S3vYQ2lnQKl6HellqktdAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T15:46:51.688950Z"},"content_sha256":"ef82428d043db04d6685995d7876159246736b992a55512238ef02fdbd73c62a","schema_version":"1.0","event_id":"sha256:ef82428d043db04d6685995d7876159246736b992a55512238ef02fdbd73c62a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/bundle.json","state_url":"https://pith.science/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/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":"2026-07-31T15:46:51Z","links":{"resolver":"https://pith.science/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS","bundle":"https://pith.science/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/bundle.json","state":"https://pith.science/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3U3G5R7NYTGLBZJEC7XZYBQDWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3U3G5R7NYTGLBZJEC7XZYBQDWS","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":"e1d9875ce79458b19c354cce7ad7b46074038c45cea5f6b4505fd44214f4f009","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-17T09:58:30Z","title_canon_sha256":"64bb8d03bcee7c97bcfe95a637eb9e61f12c6fa91d02b0ed49c4adaa3e06b40a"},"schema_version":"1.0","source":{"id":"1606.05465","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.05465","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1606.05465v2","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.05465","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"3U3G5R7NYTGL","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_16","alias_value":"3U3G5R7NYTGLBZJE","created_at":"2026-07-05T00:45:48Z"},{"alias_kind":"pith_short_8","alias_value":"3U3G5R7N","created_at":"2026-07-05T00:45:48Z"}],"graph_snapshots":[{"event_id":"sha256:ef82428d043db04d6685995d7876159246736b992a55512238ef02fdbd73c62a","target":"graph","created_at":"2026-07-05T00:45:48Z","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/1606.05465/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present optical spectroscopy and spectropolarimetry of the Type IIb SN 2008aq 16 days and 27 days post-explosion. The spectrum of SN 2008aq remained dominated by Halpha P Cygni profile at both epochs, but showed a significant increase in the strength of the helium features, which is characteristic of the transition undergone by supernovae between Type IIb and Type Ib. Comparison of the spectra of SN 2008aq to other Type IIb SNe (SN 1993J, SN 2011dh, and SN 2008ax) at similar epochs revealed that the helium lines in SN 2008aq are much weaker, suggesting that its progenitor was stripped to a ","authors_text":"A. Clocchiatti, D. Baade, F. Patat, H.F. Stevance, J.C. Wheeler, J.R. Maund, J. Spyromilio, L. Wang, P. Hoflich, P. Zelaya, Y. Yang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-17T09:58:30Z","title":"Spectropolarimetry of the Type IIb SN 2008aq"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.05465","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:f128601d90c664439e47a039f5e95adcf83bb5d78e47634bd191c42be8e8ce98","target":"record","created_at":"2026-07-05T00:45:48Z","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":"e1d9875ce79458b19c354cce7ad7b46074038c45cea5f6b4505fd44214f4f009","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-17T09:58:30Z","title_canon_sha256":"64bb8d03bcee7c97bcfe95a637eb9e61f12c6fa91d02b0ed49c4adaa3e06b40a"},"schema_version":"1.0","source":{"id":"1606.05465","kind":"arxiv","version":2}},"canonical_sha256":"dd366ec7edc4ccb0e52417ef9c0603b48fb3917d0ce0ed7722b5ffbd92ea648a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd366ec7edc4ccb0e52417ef9c0603b48fb3917d0ce0ed7722b5ffbd92ea648a","first_computed_at":"2026-07-05T00:45:48.744100Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:45:48.744100Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y11OofQQSDq3mpo8E+JkSgtbF3mW/LUUE1Lp04hRJeLpaNCEDPjWNO2VZyhqZdMPYerMmfwFkkOoPv0+3/Z+BA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:45:48.744498Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.05465","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f128601d90c664439e47a039f5e95adcf83bb5d78e47634bd191c42be8e8ce98","sha256:ef82428d043db04d6685995d7876159246736b992a55512238ef02fdbd73c62a"],"state_sha256":"b80fc20c96a226019f37b04a228824504aefeb8faccc2eb79b63e1b8a401155d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"acLK40CvC99qEDZTeupeyCJj6j6wZ9qnNWv7cjsZuM6rC2msfSjPvTXurDiXQujIbqHfKfoI/oQL0KLMBwVIBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T15:46:51.691501Z","bundle_sha256":"209ff91d34a2b4fd86d64a1ede445c0e2e80e4580aaa7fe0a2884e982491542e"}}