{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ESRDNVMGUF5T6CU3FIAQBYS4GJ","short_pith_number":"pith:ESRDNVMG","canonical_record":{"source":{"id":"1702.05494","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-17T19:00:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"62be2e4f576684cc48ffe12d79770924cf302f235a6e762ae4fd3001bebf8db8","abstract_canon_sha256":"0e5fef040db324b2325b1816b3e0c4e966ef0af9a9578fafeaa0dd64f2c7a97a"},"schema_version":"1.0"},"canonical_sha256":"24a236d586a17b3f0a9b2a0100e25c32599edb8eab5882957c9d1714e46ec2d5","source":{"kind":"arxiv","id":"1702.05494","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.05494","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"arxiv_version","alias_value":"1702.05494v1","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.05494","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"pith_short_12","alias_value":"ESRDNVMGUF5T","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"ESRDNVMGUF5T6CU3","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"ESRDNVMG","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ESRDNVMGUF5T6CU3FIAQBYS4GJ","target":"record","payload":{"canonical_record":{"source":{"id":"1702.05494","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-17T19:00:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"62be2e4f576684cc48ffe12d79770924cf302f235a6e762ae4fd3001bebf8db8","abstract_canon_sha256":"0e5fef040db324b2325b1816b3e0c4e966ef0af9a9578fafeaa0dd64f2c7a97a"},"schema_version":"1.0"},"canonical_sha256":"24a236d586a17b3f0a9b2a0100e25c32599edb8eab5882957c9d1714e46ec2d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:36.229201Z","signature_b64":"YQ2YPGnOGHNjJtJ14VqjFcbSDtqAznOzP1UNYbFVWxlk//EZGSCB5QfjXoCCqmhcvuOFmqSiSQ6LPJrWPwdjBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24a236d586a17b3f0a9b2a0100e25c32599edb8eab5882957c9d1714e46ec2d5","last_reissued_at":"2026-05-18T00:49:36.228559Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:36.228559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.05494","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":"2026-05-18T00:49:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P1Q/PV5+8zQ3YPlD9oiv4uPYd6Bm20wmT32C4XxWWxJnjQS2OuCIHr2Ztxtm0sw72vcBGqanDjXvoAu0/6gqDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:42:37.289215Z"},"content_sha256":"7d23c41be1e9ea058140cb83ca77f5a79330b27dd317686553fa7bc9dd26c212","schema_version":"1.0","event_id":"sha256:7d23c41be1e9ea058140cb83ca77f5a79330b27dd317686553fa7bc9dd26c212"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ESRDNVMGUF5T6CU3FIAQBYS4GJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Time-resolved polarimetry of the superluminous SN 2015bn with the Nordic Optical Telescope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Antonio de Ugarte Postigo, Avishay Gal-Yam, Daniele Malesani, Eric Hsiao, Ferdinando Patat, Giorgos Leloudas, J. Craig Wheeler, Jesper Sollerman, Justyn R. Maund, Maximilian D. Stritzinger, Tapio Pursimo","submitted_at":"2017-02-17T19:00:15Z","abstract_excerpt":"We present imaging polarimetry of the superluminous supernova SN 2015bn, obtained over nine epochs between $-$20 and $+$46 days with the Nordic Optical Telescope. This was a nearby, slowly-evolving Type I superluminous supernova that has been studied extensively and for which two epochs of spectropolarimetry are also available. Based on field stars, we determine the interstellar polarisation in the Galaxy to be negligible. The polarisation of SN 2015bn shows a statistically significant increase during the last epochs, confirming previous findings. Our well-sampled imaging polarimetry series al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.05494","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":"2026-05-18T00:49:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jswQZWalvEBE4BGGNYJsV8jSetzqW3TxBXjNvL5sHBcPt6+j+SmVOaeJYeiwTeelnKg4K6qigfELzrc9WdRAAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:42:37.289858Z"},"content_sha256":"1a517914c85fe5d7834109c9e5155a8f2f517a33b5e60b7030a1120b930a1cf9","schema_version":"1.0","event_id":"sha256:1a517914c85fe5d7834109c9e5155a8f2f517a33b5e60b7030a1120b930a1cf9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/bundle.json","state_url":"https://pith.science/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/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":"2026-05-27T10:42:37Z","links":{"resolver":"https://pith.science/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ","bundle":"https://pith.science/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/bundle.json","state":"https://pith.science/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESRDNVMGUF5T6CU3FIAQBYS4GJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ESRDNVMGUF5T6CU3FIAQBYS4GJ","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":"0e5fef040db324b2325b1816b3e0c4e966ef0af9a9578fafeaa0dd64f2c7a97a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-17T19:00:15Z","title_canon_sha256":"62be2e4f576684cc48ffe12d79770924cf302f235a6e762ae4fd3001bebf8db8"},"schema_version":"1.0","source":{"id":"1702.05494","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.05494","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"arxiv_version","alias_value":"1702.05494v1","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.05494","created_at":"2026-05-18T00:49:36Z"},{"alias_kind":"pith_short_12","alias_value":"ESRDNVMGUF5T","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"ESRDNVMGUF5T6CU3","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"ESRDNVMG","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:1a517914c85fe5d7834109c9e5155a8f2f517a33b5e60b7030a1120b930a1cf9","target":"graph","created_at":"2026-05-18T00:49:36Z","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 imaging polarimetry of the superluminous supernova SN 2015bn, obtained over nine epochs between $-$20 and $+$46 days with the Nordic Optical Telescope. This was a nearby, slowly-evolving Type I superluminous supernova that has been studied extensively and for which two epochs of spectropolarimetry are also available. Based on field stars, we determine the interstellar polarisation in the Galaxy to be negligible. The polarisation of SN 2015bn shows a statistically significant increase during the last epochs, confirming previous findings. Our well-sampled imaging polarimetry series al","authors_text":"Antonio de Ugarte Postigo, Avishay Gal-Yam, Daniele Malesani, Eric Hsiao, Ferdinando Patat, Giorgos Leloudas, J. Craig Wheeler, Jesper Sollerman, Justyn R. Maund, Maximilian D. Stritzinger, Tapio Pursimo","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-17T19:00:15Z","title":"Time-resolved polarimetry of the superluminous SN 2015bn with the Nordic Optical Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.05494","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":"sha256:7d23c41be1e9ea058140cb83ca77f5a79330b27dd317686553fa7bc9dd26c212","target":"record","created_at":"2026-05-18T00:49:36Z","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":"0e5fef040db324b2325b1816b3e0c4e966ef0af9a9578fafeaa0dd64f2c7a97a","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-02-17T19:00:15Z","title_canon_sha256":"62be2e4f576684cc48ffe12d79770924cf302f235a6e762ae4fd3001bebf8db8"},"schema_version":"1.0","source":{"id":"1702.05494","kind":"arxiv","version":1}},"canonical_sha256":"24a236d586a17b3f0a9b2a0100e25c32599edb8eab5882957c9d1714e46ec2d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24a236d586a17b3f0a9b2a0100e25c32599edb8eab5882957c9d1714e46ec2d5","first_computed_at":"2026-05-18T00:49:36.228559Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:36.228559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YQ2YPGnOGHNjJtJ14VqjFcbSDtqAznOzP1UNYbFVWxlk//EZGSCB5QfjXoCCqmhcvuOFmqSiSQ6LPJrWPwdjBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:36.229201Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.05494","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d23c41be1e9ea058140cb83ca77f5a79330b27dd317686553fa7bc9dd26c212","sha256:1a517914c85fe5d7834109c9e5155a8f2f517a33b5e60b7030a1120b930a1cf9"],"state_sha256":"e1f3aa379e2845ace2bf5a8c424333bb95c4a54b5be96b63ecc216fc43f258ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZAGLg2aRIpEhCQu3ruMDH1SSS0LKbqNRQj53Zko2Vpca3ZRZeLiXr5MxagX3pwKSpbHBvI2Fzn6/UK4uVrIUDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:42:37.293405Z","bundle_sha256":"c0157aef771ba9cc3e95c0d2cab26b9b8e686237851997dc7cbfaa4aef5a651e"}}