{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:2Z3V3VBBSL4DH3A5MGJZ7LTU62","short_pith_number":"pith:2Z3V3VBB","canonical_record":{"source":{"id":"1203.5315","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-23T18:37:36Z","cross_cats_sorted":[],"title_canon_sha256":"e41717275ecb45f27791c00460dd7440bc40925355951fb67807380375cec860","abstract_canon_sha256":"99fb917b1f947341a12d5993a1085583391931c3bc4708eebfcbb787d194674d"},"schema_version":"1.0"},"canonical_sha256":"d6775dd42192f833ec1d61939fae74f6af95ce59545729adfff8c144c0687de2","source":{"kind":"arxiv","id":"1203.5315","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.5315","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"arxiv_version","alias_value":"1203.5315v1","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.5315","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"pith_short_12","alias_value":"2Z3V3VBBSL4D","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2Z3V3VBBSL4DH3A5","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2Z3V3VBB","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:2Z3V3VBBSL4DH3A5MGJZ7LTU62","target":"record","payload":{"canonical_record":{"source":{"id":"1203.5315","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-23T18:37:36Z","cross_cats_sorted":[],"title_canon_sha256":"e41717275ecb45f27791c00460dd7440bc40925355951fb67807380375cec860","abstract_canon_sha256":"99fb917b1f947341a12d5993a1085583391931c3bc4708eebfcbb787d194674d"},"schema_version":"1.0"},"canonical_sha256":"d6775dd42192f833ec1d61939fae74f6af95ce59545729adfff8c144c0687de2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:02.392509Z","signature_b64":"Hq4/XwyCznvUBnF5uAnd3Rdila3gt5Q5l7caUH5hOS81ngkMOuI8/I+d6aQczMEBem4bhTwxv8w4xFCrEOUoDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6775dd42192f833ec1d61939fae74f6af95ce59545729adfff8c144c0687de2","last_reissued_at":"2026-05-18T01:58:02.391979Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:02.391979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.5315","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":"2026-05-18T01:58:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L8cwNR2D4uDFW6RpkRYjG2PKg/uiVpA6c7eibmUrqfBkBoBaM/TGR/HoVc4sT0dntNi/cIEg6FfGKtDKJUWiAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:40:56.211186Z"},"content_sha256":"d66abedc9c82f32c4ef9d048fa528cc9914ec59d4b9f52b01e6749abeab85006","schema_version":"1.0","event_id":"sha256:d66abedc9c82f32c4ef9d048fa528cc9914ec59d4b9f52b01e6749abeab85006"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:2Z3V3VBBSL4DH3A5MGJZ7LTU62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on Type Ia Supernova Progenitor Companions from Early Ultraviolet Observations with Swift","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"David W. Harris, Kyle S. Dawson, Matthew Olmstead, Peter J. Brown, Peter Milne, Peter W. A. Roming","submitted_at":"2012-03-23T18:37:36Z","abstract_excerpt":"We compare early ultraviolet (UV) observations of Type Ia Supernovae (SNe Ia) with theoretical predictions for the brightness of the shock associated with the collision between SN ejecta and a companion star. Our simple method is independent of the intrinsic flux from the SN and treats the flux observed with the Swift/Ultra-Violet Optical Telescope (UVOT) as conservative upper limits on the shock brightness. Comparing this limit with the predicted flux for various shock models, we constrain the geometry of the SN progenitor-companion system. We find the model of a 1 M_sun red supergiant compan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.5315","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":"2026-05-18T01:58:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lJKQkvagHnFDL4Lg95YjQkJJO+HRHM9VXSGvcHnC45e/GWu9ufyz3XTj5Di3wbwupMgo6R5ri05pp7mqAzNiCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:40:56.211912Z"},"content_sha256":"35fdfce18c9c0f0291be261e0b69b71b3350718e057c38b4bc81a979bd216e58","schema_version":"1.0","event_id":"sha256:35fdfce18c9c0f0291be261e0b69b71b3350718e057c38b4bc81a979bd216e58"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/bundle.json","state_url":"https://pith.science/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/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":"2026-05-27T12:40:56Z","links":{"resolver":"https://pith.science/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62","bundle":"https://pith.science/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/bundle.json","state":"https://pith.science/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2Z3V3VBBSL4DH3A5MGJZ7LTU62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2Z3V3VBBSL4DH3A5MGJZ7LTU62","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":"99fb917b1f947341a12d5993a1085583391931c3bc4708eebfcbb787d194674d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-23T18:37:36Z","title_canon_sha256":"e41717275ecb45f27791c00460dd7440bc40925355951fb67807380375cec860"},"schema_version":"1.0","source":{"id":"1203.5315","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.5315","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"arxiv_version","alias_value":"1203.5315v1","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.5315","created_at":"2026-05-18T01:58:02Z"},{"alias_kind":"pith_short_12","alias_value":"2Z3V3VBBSL4D","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2Z3V3VBBSL4DH3A5","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2Z3V3VBB","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:35fdfce18c9c0f0291be261e0b69b71b3350718e057c38b4bc81a979bd216e58","target":"graph","created_at":"2026-05-18T01:58:02Z","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 compare early ultraviolet (UV) observations of Type Ia Supernovae (SNe Ia) with theoretical predictions for the brightness of the shock associated with the collision between SN ejecta and a companion star. Our simple method is independent of the intrinsic flux from the SN and treats the flux observed with the Swift/Ultra-Violet Optical Telescope (UVOT) as conservative upper limits on the shock brightness. Comparing this limit with the predicted flux for various shock models, we constrain the geometry of the SN progenitor-companion system. We find the model of a 1 M_sun red supergiant compan","authors_text":"David W. Harris, Kyle S. Dawson, Matthew Olmstead, Peter J. Brown, Peter Milne, Peter W. A. Roming","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-23T18:37:36Z","title":"Constraints on Type Ia Supernova Progenitor Companions from Early Ultraviolet Observations with Swift"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.5315","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:d66abedc9c82f32c4ef9d048fa528cc9914ec59d4b9f52b01e6749abeab85006","target":"record","created_at":"2026-05-18T01:58:02Z","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":"99fb917b1f947341a12d5993a1085583391931c3bc4708eebfcbb787d194674d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-23T18:37:36Z","title_canon_sha256":"e41717275ecb45f27791c00460dd7440bc40925355951fb67807380375cec860"},"schema_version":"1.0","source":{"id":"1203.5315","kind":"arxiv","version":1}},"canonical_sha256":"d6775dd42192f833ec1d61939fae74f6af95ce59545729adfff8c144c0687de2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6775dd42192f833ec1d61939fae74f6af95ce59545729adfff8c144c0687de2","first_computed_at":"2026-05-18T01:58:02.391979Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:02.391979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hq4/XwyCznvUBnF5uAnd3Rdila3gt5Q5l7caUH5hOS81ngkMOuI8/I+d6aQczMEBem4bhTwxv8w4xFCrEOUoDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:02.392509Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.5315","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d66abedc9c82f32c4ef9d048fa528cc9914ec59d4b9f52b01e6749abeab85006","sha256:35fdfce18c9c0f0291be261e0b69b71b3350718e057c38b4bc81a979bd216e58"],"state_sha256":"53ae91169c9271fc1b932371a3c4f9244a4898bbcd15cccab13a7a2a2f73b2ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YhAswwK37zISAksKgLDOUs2qOimIAfiNGY0ek3fm70H9sasrkVSWBV+fzU+C1zS8QC5wJ+eUb1mMKwl5bRiYBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:40:56.215359Z","bundle_sha256":"b3b66ad6b63ede976aefe580c67409c6881ed52e4e98fe08e2bcd8151a30433d"}}