{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CLXFBPNXYP5M4ITBB7I5JZ5HTT","short_pith_number":"pith:CLXFBPNX","canonical_record":{"source":{"id":"1901.07562","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"09b21ff411d04948ba6eb840ff71d469852c9ddae1a5c427bcc664231485605f","abstract_canon_sha256":"45aaa7c24bde9d177aeed010b6a4c474eaefab496ceed931221a2342082276c5"},"schema_version":"1.0"},"canonical_sha256":"12ee50bdb7c3face22610fd1d4e7a79cf81bec745f91cc146f4618558bcb8244","source":{"kind":"arxiv","id":"1901.07562","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07562","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07562v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07562","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"CLXFBPNXYP5M","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CLXFBPNXYP5M4ITB","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CLXFBPNX","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CLXFBPNXYP5M4ITBB7I5JZ5HTT","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07562","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"09b21ff411d04948ba6eb840ff71d469852c9ddae1a5c427bcc664231485605f","abstract_canon_sha256":"45aaa7c24bde9d177aeed010b6a4c474eaefab496ceed931221a2342082276c5"},"schema_version":"1.0"},"canonical_sha256":"12ee50bdb7c3face22610fd1d4e7a79cf81bec745f91cc146f4618558bcb8244","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:10.194388Z","signature_b64":"ujR+kuV1mga0KbmP/gnjsUFTZxjHW5wl97W4cLtq6pnECsS1YftKLRof5hWncvT8eDRRSpEiI8cqGSS+fi9uCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12ee50bdb7c3face22610fd1d4e7a79cf81bec745f91cc146f4618558bcb8244","last_reissued_at":"2026-05-17T23:55:10.193915Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:10.193915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07562","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oiA7UWtNvj+5sYd99xnJub1Xm9w9Ymr8aUdAUhgQEWFETFdByIUZJHsA/fXr6bO7rq6dL55LauXyt8ZbMBGNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:12:54.362304Z"},"content_sha256":"8fdaeb18e7c1e2ff5a7907cf5184c3598843040053db7ebb75abe82bec2d99b4","schema_version":"1.0","event_id":"sha256:8fdaeb18e7c1e2ff5a7907cf5184c3598843040053db7ebb75abe82bec2d99b4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CLXFBPNXYP5M4ITBB7I5JZ5HTT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The 3D shape of Type IIb SN 2011hs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Cikota, A. Clocchiatti, D. Baade, F. Patat, H. F. Stevance, J. Bruten, J.C. Wheeler, J.R. Maund, J. Spyromilio, L. Wang, P. Crowther, P. H\\\"oflich, Y. Yang","submitted_at":"2019-01-22T19:00:00Z","abstract_excerpt":"We observed seven epochs of spectropolarimetry in optical wavelengths for the Type IIb SN 2011hs, ranging from -3 to +40 days with respect to V -band maximum. A high degree of interstellar polarization was detected (up to ~3 percent), with a peak lying blueward of 4500A. Similar behaviours have been seen in some Type Ia SNe, but had never been observed in a Type IIb. We find that it is most likely the result of a relative enhancement of small silicate grains in the vicinity of the SN. Significant intrinsic continuum polarization was recovered at -3 and +2 days (p = 0.55 +\\- 0.12 percent and p "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07562","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8LElzWS0kczcGsIV5lmrb7HFzYy1ZYGs8lLaHi+gXGuME7Gmq5y/lrJ7jW+/IUHj6HS0ekKwfBruU/OmMM5lBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:12:54.362950Z"},"content_sha256":"cec7d42baa967330122cbbba97637a77ac26eced0e5e737790949ca4162b1537","schema_version":"1.0","event_id":"sha256:cec7d42baa967330122cbbba97637a77ac26eced0e5e737790949ca4162b1537"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/bundle.json","state_url":"https://pith.science/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/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":"2026-06-06T20:12:54Z","links":{"resolver":"https://pith.science/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT","bundle":"https://pith.science/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/bundle.json","state":"https://pith.science/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CLXFBPNXYP5M4ITBB7I5JZ5HTT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CLXFBPNXYP5M4ITBB7I5JZ5HTT","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":"45aaa7c24bde9d177aeed010b6a4c474eaefab496ceed931221a2342082276c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T19:00:00Z","title_canon_sha256":"09b21ff411d04948ba6eb840ff71d469852c9ddae1a5c427bcc664231485605f"},"schema_version":"1.0","source":{"id":"1901.07562","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07562","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07562v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07562","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"CLXFBPNXYP5M","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CLXFBPNXYP5M4ITB","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CLXFBPNX","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:cec7d42baa967330122cbbba97637a77ac26eced0e5e737790949ca4162b1537","target":"graph","created_at":"2026-05-17T23:55:10Z","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 observed seven epochs of spectropolarimetry in optical wavelengths for the Type IIb SN 2011hs, ranging from -3 to +40 days with respect to V -band maximum. A high degree of interstellar polarization was detected (up to ~3 percent), with a peak lying blueward of 4500A. Similar behaviours have been seen in some Type Ia SNe, but had never been observed in a Type IIb. We find that it is most likely the result of a relative enhancement of small silicate grains in the vicinity of the SN. Significant intrinsic continuum polarization was recovered at -3 and +2 days (p = 0.55 +\\- 0.12 percent and p ","authors_text":"A. Cikota, A. Clocchiatti, D. Baade, F. Patat, H. F. Stevance, J. Bruten, J.C. Wheeler, J.R. Maund, J. Spyromilio, L. Wang, P. Crowther, P. H\\\"oflich, Y. Yang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T19:00:00Z","title":"The 3D shape of Type IIb SN 2011hs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07562","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":"sha256:8fdaeb18e7c1e2ff5a7907cf5184c3598843040053db7ebb75abe82bec2d99b4","target":"record","created_at":"2026-05-17T23:55:10Z","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":"45aaa7c24bde9d177aeed010b6a4c474eaefab496ceed931221a2342082276c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-22T19:00:00Z","title_canon_sha256":"09b21ff411d04948ba6eb840ff71d469852c9ddae1a5c427bcc664231485605f"},"schema_version":"1.0","source":{"id":"1901.07562","kind":"arxiv","version":1}},"canonical_sha256":"12ee50bdb7c3face22610fd1d4e7a79cf81bec745f91cc146f4618558bcb8244","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12ee50bdb7c3face22610fd1d4e7a79cf81bec745f91cc146f4618558bcb8244","first_computed_at":"2026-05-17T23:55:10.193915Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:10.193915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ujR+kuV1mga0KbmP/gnjsUFTZxjHW5wl97W4cLtq6pnECsS1YftKLRof5hWncvT8eDRRSpEiI8cqGSS+fi9uCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:10.194388Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07562","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fdaeb18e7c1e2ff5a7907cf5184c3598843040053db7ebb75abe82bec2d99b4","sha256:cec7d42baa967330122cbbba97637a77ac26eced0e5e737790949ca4162b1537"],"state_sha256":"95d5a8ced754cef3becffc8a8636ea10f4bf3363d6a70d515ec0e397ddd98ad0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CzWdorYkkPIWIdp/YdmeoEicz7Fk075djyuABYObxw20jgYmkEKW0dXtahEDDKqEhrMWe+yaMzcz39UHQFSsAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T20:12:54.366754Z","bundle_sha256":"1117446969921ad006b2f96dde38fa29fb7a4ab1ee5f95e2276eb48aefd5f8d0"}}