{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:IVQSK7XMI5CPVGA7LV4I5XRHWP","short_pith_number":"pith:IVQSK7XM","canonical_record":{"source":{"id":"1708.05394","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-08-17T18:01:04Z","cross_cats_sorted":[],"title_canon_sha256":"c14966815ec5e9574218ab1767b3ff4a42d365d320b5ec7f7c7cc6d31aea07de","abstract_canon_sha256":"8e3a2140923b76a0692ee4a8acdf9ed6431790d25132edc258ef1f00edfa061b"},"schema_version":"1.0"},"canonical_sha256":"4561257eec4744fa981f5d788ede27b3e375c03b569eef1c042681580e4f4ca3","source":{"kind":"arxiv","id":"1708.05394","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.05394","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"arxiv_version","alias_value":"1708.05394v2","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.05394","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"pith_short_12","alias_value":"IVQSK7XMI5CP","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IVQSK7XMI5CPVGA7","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IVQSK7XM","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:IVQSK7XMI5CPVGA7LV4I5XRHWP","target":"record","payload":{"canonical_record":{"source":{"id":"1708.05394","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-08-17T18:01:04Z","cross_cats_sorted":[],"title_canon_sha256":"c14966815ec5e9574218ab1767b3ff4a42d365d320b5ec7f7c7cc6d31aea07de","abstract_canon_sha256":"8e3a2140923b76a0692ee4a8acdf9ed6431790d25132edc258ef1f00edfa061b"},"schema_version":"1.0"},"canonical_sha256":"4561257eec4744fa981f5d788ede27b3e375c03b569eef1c042681580e4f4ca3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:13.126185Z","signature_b64":"fMzh6s22WyznPlwsEDRWEum0DC3pK/DfU02Xh8s5RpRkfuCYMQMMBohvUd7yhMR0GmKmMwTWwtouwmG6XaZ1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4561257eec4744fa981f5d788ede27b3e375c03b569eef1c042681580e4f4ca3","last_reissued_at":"2026-05-18T00:27:13.125555Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:13.125555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.05394","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":"2026-05-18T00:27:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"smecRxeZV2MvhyKp+Uc1GxlgToKdpbOzJgWlC5iZ1ZWJLNSqUWav14TTDYN660+oXkJxefMYD3yjdHrFXeU/Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T07:04:59.682888Z"},"content_sha256":"65a476151290d60478400f4bba26eed368c42c74c2a7ba9f850d3414ec4a5042","schema_version":"1.0","event_id":"sha256:65a476151290d60478400f4bba26eed368c42c74c2a7ba9f850d3414ec4a5042"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:IVQSK7XMI5CPVGA7LV4I5XRHWP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"No evidence of circumstellar gas surrounding Type Ia Supernova SN 2017cbv","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ariel Goobar, Joel Johansson, Mattia Bulla, Peter Lundqvist, Rahman Amanullah, Raphael Ferretti","submitted_at":"2017-08-17T18:01:04Z","abstract_excerpt":"Nearby type Ia supernovae (SNe Ia), such as SN 2017cbv, are useful events to address the question of what the elusive progenitor systems of the explosions are. Hosseinzadeh et al. (2017) suggested that the early blue excess of the lightcurve of SN 2017cbv could be due to the supernova ejecta interacting with a non-degenerate companion star. Some SN Ia progenitor models suggest the existence of circumstellar (CS) environments in which strong outflows create low density cavities of different radii. Matter deposited at the edges of the cavities, should be at distances at which photoionisation due"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.05394","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":"2026-05-18T00:27:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+m0DsTsWziE9Fu1BOgO0N9AHJW9/g0k15oeS+sYpS+SwjuqQjFi2wn39/SAV6lPtmsajTlOWkLPnU+Jo3UjpAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T07:04:59.683238Z"},"content_sha256":"079a175a9e2255ec055b076220298628c698edf944d8af9e7ddec9dad2736547","schema_version":"1.0","event_id":"sha256:079a175a9e2255ec055b076220298628c698edf944d8af9e7ddec9dad2736547"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/bundle.json","state_url":"https://pith.science/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/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":"2026-06-01T07:04:59Z","links":{"resolver":"https://pith.science/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP","bundle":"https://pith.science/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/bundle.json","state":"https://pith.science/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IVQSK7XMI5CPVGA7LV4I5XRHWP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:IVQSK7XMI5CPVGA7LV4I5XRHWP","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":"8e3a2140923b76a0692ee4a8acdf9ed6431790d25132edc258ef1f00edfa061b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-08-17T18:01:04Z","title_canon_sha256":"c14966815ec5e9574218ab1767b3ff4a42d365d320b5ec7f7c7cc6d31aea07de"},"schema_version":"1.0","source":{"id":"1708.05394","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.05394","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"arxiv_version","alias_value":"1708.05394v2","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.05394","created_at":"2026-05-18T00:27:13Z"},{"alias_kind":"pith_short_12","alias_value":"IVQSK7XMI5CP","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IVQSK7XMI5CPVGA7","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IVQSK7XM","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:079a175a9e2255ec055b076220298628c698edf944d8af9e7ddec9dad2736547","target":"graph","created_at":"2026-05-18T00:27:13Z","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":"Nearby type Ia supernovae (SNe Ia), such as SN 2017cbv, are useful events to address the question of what the elusive progenitor systems of the explosions are. Hosseinzadeh et al. (2017) suggested that the early blue excess of the lightcurve of SN 2017cbv could be due to the supernova ejecta interacting with a non-degenerate companion star. Some SN Ia progenitor models suggest the existence of circumstellar (CS) environments in which strong outflows create low density cavities of different radii. Matter deposited at the edges of the cavities, should be at distances at which photoionisation due","authors_text":"Ariel Goobar, Joel Johansson, Mattia Bulla, Peter Lundqvist, Rahman Amanullah, Raphael Ferretti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-08-17T18:01:04Z","title":"No evidence of circumstellar gas surrounding Type Ia Supernova SN 2017cbv"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.05394","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":"sha256:65a476151290d60478400f4bba26eed368c42c74c2a7ba9f850d3414ec4a5042","target":"record","created_at":"2026-05-18T00:27:13Z","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":"8e3a2140923b76a0692ee4a8acdf9ed6431790d25132edc258ef1f00edfa061b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-08-17T18:01:04Z","title_canon_sha256":"c14966815ec5e9574218ab1767b3ff4a42d365d320b5ec7f7c7cc6d31aea07de"},"schema_version":"1.0","source":{"id":"1708.05394","kind":"arxiv","version":2}},"canonical_sha256":"4561257eec4744fa981f5d788ede27b3e375c03b569eef1c042681580e4f4ca3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4561257eec4744fa981f5d788ede27b3e375c03b569eef1c042681580e4f4ca3","first_computed_at":"2026-05-18T00:27:13.125555Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:13.125555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fMzh6s22WyznPlwsEDRWEum0DC3pK/DfU02Xh8s5RpRkfuCYMQMMBohvUd7yhMR0GmKmMwTWwtouwmG6XaZ1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:13.126185Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.05394","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65a476151290d60478400f4bba26eed368c42c74c2a7ba9f850d3414ec4a5042","sha256:079a175a9e2255ec055b076220298628c698edf944d8af9e7ddec9dad2736547"],"state_sha256":"a44af5a8b04a40e4fdd11e30fe88fa22e3b27ce5e14c2e83197c8f39626681e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JaFeMbKDXAkJohbtplMw5RNgsYw7qP+TL28pGOz9SnJ5VEjK+B7TlWfXMDLspq4p3nSVWSsOBxF5DBls55svBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T07:04:59.685341Z","bundle_sha256":"ecfe7a076e76845fb87c8acdb5578fde9aa63e17f888092f7a21596823a72661"}}