{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:53PJTCDVC7BZXB3LQ5MQGF5LGW","short_pith_number":"pith:53PJTCDV","canonical_record":{"source":{"id":"1203.1808","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-08T14:20:02Z","cross_cats_sorted":[],"title_canon_sha256":"e99ad5f3fc04476f8e671e7bb0b71e7abddda095d331a08e1c283676fd9134ae","abstract_canon_sha256":"7abb152a3144637f7b027a34493787d4ee5f91bca4a9c9c8cfb4d2edb4c120e5"},"schema_version":"1.0"},"canonical_sha256":"eede99887517c39b876b87590317ab3589dd9cc986f05272b8de5f21cc57cb0e","source":{"kind":"arxiv","id":"1203.1808","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1808","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1808v2","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1808","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"pith_short_12","alias_value":"53PJTCDVC7BZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"53PJTCDVC7BZXB3L","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"53PJTCDV","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:53PJTCDVC7BZXB3LQ5MQGF5LGW","target":"record","payload":{"canonical_record":{"source":{"id":"1203.1808","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-08T14:20:02Z","cross_cats_sorted":[],"title_canon_sha256":"e99ad5f3fc04476f8e671e7bb0b71e7abddda095d331a08e1c283676fd9134ae","abstract_canon_sha256":"7abb152a3144637f7b027a34493787d4ee5f91bca4a9c9c8cfb4d2edb4c120e5"},"schema_version":"1.0"},"canonical_sha256":"eede99887517c39b876b87590317ab3589dd9cc986f05272b8de5f21cc57cb0e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:42.258027Z","signature_b64":"qsXR25J/fyuTrX9622ZXpjbFjXCqCaCz2QCRGyj30HvlHkTFjqf/8Rm2YUEP9OxHcrwIMJL6uALREI01m6XQAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eede99887517c39b876b87590317ab3589dd9cc986f05272b8de5f21cc57cb0e","last_reissued_at":"2026-05-18T03:43:42.257354Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:42.257354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.1808","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":"2026-05-18T03:43:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"roFVXwBkIRhxUGQqqU8yudw6ZlblyZxPmxJVhwBRJVBZibdWptwvIYC6RidHgDZOVb8IGjo9u4bftIeC8ax4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:45:01.871453Z"},"content_sha256":"80dae834f1578db618ac38e02f47d69181bace335423f3dd4ad1427cdfaf3cfb","schema_version":"1.0","event_id":"sha256:80dae834f1578db618ac38e02f47d69181bace335423f3dd4ad1427cdfaf3cfb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:53PJTCDVC7BZXB3LQ5MQGF5LGW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A note on the survival of the sungrazing comet C/2011 W3 (Lovejoy) within the Roche limit","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"B. Gundlach, H. U. Keller, J. Blum, Yu. V. Skorov","submitted_at":"2012-03-08T14:20:02Z","abstract_excerpt":"In this work, a novel approach to explain the survival of sungrazing comets within the Roche limit is presented. It is shown that in the case of low tensile strength of the cometary nucleus, tidal splitting of the nucleus can be prevented by the reaction force caused by the sublimation of the icy constituents. The survival of Comet C/2011 W3 (Lovejoy) within the Roche limit of the Sun is, thus, the result of high tensile strength of the nucleus, or the result of the reaction force caused by the strong outgassing of the icy constituents near the Sun."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1808","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":"2026-05-18T03:43:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eKodveAzua+UWDJW6Zu/kCYludS+8ohm7B0Kc0sDFMCyXNENsu9NUsFRQnhhLTQ0XPcnJRVF4S2IYbNA9k+3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:45:01.871829Z"},"content_sha256":"7bf61eae3c890ab5d745ca6fcaa8f33b7732a1eb1f2923ffef68f4e5950c46fc","schema_version":"1.0","event_id":"sha256:7bf61eae3c890ab5d745ca6fcaa8f33b7732a1eb1f2923ffef68f4e5950c46fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/bundle.json","state_url":"https://pith.science/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/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":"2026-05-25T09:45:01Z","links":{"resolver":"https://pith.science/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW","bundle":"https://pith.science/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/bundle.json","state":"https://pith.science/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/53PJTCDVC7BZXB3LQ5MQGF5LGW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:53PJTCDVC7BZXB3LQ5MQGF5LGW","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":"7abb152a3144637f7b027a34493787d4ee5f91bca4a9c9c8cfb4d2edb4c120e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-08T14:20:02Z","title_canon_sha256":"e99ad5f3fc04476f8e671e7bb0b71e7abddda095d331a08e1c283676fd9134ae"},"schema_version":"1.0","source":{"id":"1203.1808","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.1808","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"arxiv_version","alias_value":"1203.1808v2","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.1808","created_at":"2026-05-18T03:43:42Z"},{"alias_kind":"pith_short_12","alias_value":"53PJTCDVC7BZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"53PJTCDVC7BZXB3L","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"53PJTCDV","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:7bf61eae3c890ab5d745ca6fcaa8f33b7732a1eb1f2923ffef68f4e5950c46fc","target":"graph","created_at":"2026-05-18T03:43:42Z","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":"In this work, a novel approach to explain the survival of sungrazing comets within the Roche limit is presented. It is shown that in the case of low tensile strength of the cometary nucleus, tidal splitting of the nucleus can be prevented by the reaction force caused by the sublimation of the icy constituents. The survival of Comet C/2011 W3 (Lovejoy) within the Roche limit of the Sun is, thus, the result of high tensile strength of the nucleus, or the result of the reaction force caused by the strong outgassing of the icy constituents near the Sun.","authors_text":"B. Gundlach, H. U. Keller, J. Blum, Yu. V. Skorov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-08T14:20:02Z","title":"A note on the survival of the sungrazing comet C/2011 W3 (Lovejoy) within the Roche limit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.1808","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":"sha256:80dae834f1578db618ac38e02f47d69181bace335423f3dd4ad1427cdfaf3cfb","target":"record","created_at":"2026-05-18T03:43:42Z","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":"7abb152a3144637f7b027a34493787d4ee5f91bca4a9c9c8cfb4d2edb4c120e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-03-08T14:20:02Z","title_canon_sha256":"e99ad5f3fc04476f8e671e7bb0b71e7abddda095d331a08e1c283676fd9134ae"},"schema_version":"1.0","source":{"id":"1203.1808","kind":"arxiv","version":2}},"canonical_sha256":"eede99887517c39b876b87590317ab3589dd9cc986f05272b8de5f21cc57cb0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eede99887517c39b876b87590317ab3589dd9cc986f05272b8de5f21cc57cb0e","first_computed_at":"2026-05-18T03:43:42.257354Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:42.257354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qsXR25J/fyuTrX9622ZXpjbFjXCqCaCz2QCRGyj30HvlHkTFjqf/8Rm2YUEP9OxHcrwIMJL6uALREI01m6XQAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:42.258027Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.1808","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:80dae834f1578db618ac38e02f47d69181bace335423f3dd4ad1427cdfaf3cfb","sha256:7bf61eae3c890ab5d745ca6fcaa8f33b7732a1eb1f2923ffef68f4e5950c46fc"],"state_sha256":"f17aaebf3b27cbf5fbd9edd9ec9cf5f2bb77f4b9c3c5b2177392e92c47c7308b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8XIJikSwuchukwko9WA8eLhC6iLrqiYKBHKezzw1nbxPR3KZjB0bS8sntuyEvCc4Oo08CFrzuvca8xu8/BR2Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T09:45:01.876596Z","bundle_sha256":"bc1b5429f24809ad1f3e306d7bb183bb270d39dec2ebde7482b9200a24e57786"}}