{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:U6TY6V3IEHV7F26774GWY5CQDZ","short_pith_number":"pith:U6TY6V3I","canonical_record":{"source":{"id":"1805.00228","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-05-01T08:05:09Z","cross_cats_sorted":[],"title_canon_sha256":"d6a7fcf6748cc2089a81a271926a15af9971961841eaeea57905ab92f78acc0d","abstract_canon_sha256":"5b9f8058cb1390d19d5e451de635d2cdfa3a21a9b10660ed14d17cd539864789"},"schema_version":"1.0"},"canonical_sha256":"a7a78f576821ebf2ebdfff0d6c74501e70ba96b8a0357d15b5821ff924c47117","source":{"kind":"arxiv","id":"1805.00228","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00228","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00228v2","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00228","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"pith_short_12","alias_value":"U6TY6V3IEHV7","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"U6TY6V3IEHV7F267","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"U6TY6V3I","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:U6TY6V3IEHV7F26774GWY5CQDZ","target":"record","payload":{"canonical_record":{"source":{"id":"1805.00228","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-05-01T08:05:09Z","cross_cats_sorted":[],"title_canon_sha256":"d6a7fcf6748cc2089a81a271926a15af9971961841eaeea57905ab92f78acc0d","abstract_canon_sha256":"5b9f8058cb1390d19d5e451de635d2cdfa3a21a9b10660ed14d17cd539864789"},"schema_version":"1.0"},"canonical_sha256":"a7a78f576821ebf2ebdfff0d6c74501e70ba96b8a0357d15b5821ff924c47117","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:31.332067Z","signature_b64":"nDRJdLPRi+Y91gWWxd7i0FbAMGwF6MYjzluLwZV6+2YE/uuIhe8TkzWHuWaiytFWpva6CI19UqQyB0jCuq2TCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7a78f576821ebf2ebdfff0d6c74501e70ba96b8a0357d15b5821ff924c47117","last_reissued_at":"2026-05-18T00:05:31.331604Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:31.331604Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.00228","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":"2026-05-18T00:05:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ph2gJXJ1RkT63LNnSasdMH87mYiXKIYDxmmdDg1f1Ezkudup/KB1tFXK+IqSg7Q3HegtA76fj2o7aor5F8hMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:30:55.545756Z"},"content_sha256":"d2d151dbcbe6d3c0878a7f490646fc8eaf94d2b3a11e3d75209f81f28339951b","schema_version":"1.0","event_id":"sha256:d2d151dbcbe6d3c0878a7f490646fc8eaf94d2b3a11e3d75209f81f28339951b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:U6TY6V3IEHV7F26774GWY5CQDZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An explanation for the peculiar periphery of supernova remnant G309.2-0.6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Huan Yu, Jun Fang","submitted_at":"2018-05-01T08:05:09Z","abstract_excerpt":"Supernova remnant (SNR) G309.2-0.6 has a peculiar radio morphology with two bright ears to the southwest and northeast, although the main shell outside the ears is roughly circular. Based on an earlier proposal that the supernova ejecta has a jet component with extra energy, the dynamical evolution of the remnant is solved using 3D hydrodynamical (HD) simulation to investigate the formation of the periphery of the remnant. Assuming the ejecta with a kinetic energy of $10^{51}$\\,erg and a mass of $3~\\mathrm{M}_{\\odot}$ evolved in a uniform ambient medium for a time of $\\sim 4000$\\,yr and the je"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00228","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":"2026-05-18T00:05:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h6FaVZHkOlZGqAOmOiTgNLlQY8DT+dfs2PhG3AGITlAif/ACCPLqF2lLBj38v2j5gnjc6ayDd5U1FrhgCQbGAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:30:55.546426Z"},"content_sha256":"527990f6711b5b271eb0010b9bcffba0f5f59537e8a9144da4f6ee82b598aa3f","schema_version":"1.0","event_id":"sha256:527990f6711b5b271eb0010b9bcffba0f5f59537e8a9144da4f6ee82b598aa3f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U6TY6V3IEHV7F26774GWY5CQDZ/bundle.json","state_url":"https://pith.science/pith/U6TY6V3IEHV7F26774GWY5CQDZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U6TY6V3IEHV7F26774GWY5CQDZ/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":"2026-06-07T15:30:55Z","links":{"resolver":"https://pith.science/pith/U6TY6V3IEHV7F26774GWY5CQDZ","bundle":"https://pith.science/pith/U6TY6V3IEHV7F26774GWY5CQDZ/bundle.json","state":"https://pith.science/pith/U6TY6V3IEHV7F26774GWY5CQDZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U6TY6V3IEHV7F26774GWY5CQDZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:U6TY6V3IEHV7F26774GWY5CQDZ","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":"5b9f8058cb1390d19d5e451de635d2cdfa3a21a9b10660ed14d17cd539864789","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-05-01T08:05:09Z","title_canon_sha256":"d6a7fcf6748cc2089a81a271926a15af9971961841eaeea57905ab92f78acc0d"},"schema_version":"1.0","source":{"id":"1805.00228","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.00228","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"arxiv_version","alias_value":"1805.00228v2","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.00228","created_at":"2026-05-18T00:05:31Z"},{"alias_kind":"pith_short_12","alias_value":"U6TY6V3IEHV7","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"U6TY6V3IEHV7F267","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"U6TY6V3I","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:527990f6711b5b271eb0010b9bcffba0f5f59537e8a9144da4f6ee82b598aa3f","target":"graph","created_at":"2026-05-18T00:05:31Z","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":"Supernova remnant (SNR) G309.2-0.6 has a peculiar radio morphology with two bright ears to the southwest and northeast, although the main shell outside the ears is roughly circular. Based on an earlier proposal that the supernova ejecta has a jet component with extra energy, the dynamical evolution of the remnant is solved using 3D hydrodynamical (HD) simulation to investigate the formation of the periphery of the remnant. Assuming the ejecta with a kinetic energy of $10^{51}$\\,erg and a mass of $3~\\mathrm{M}_{\\odot}$ evolved in a uniform ambient medium for a time of $\\sim 4000$\\,yr and the je","authors_text":"Huan Yu, Jun Fang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-05-01T08:05:09Z","title":"An explanation for the peculiar periphery of supernova remnant G309.2-0.6"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.00228","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:d2d151dbcbe6d3c0878a7f490646fc8eaf94d2b3a11e3d75209f81f28339951b","target":"record","created_at":"2026-05-18T00:05:31Z","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":"5b9f8058cb1390d19d5e451de635d2cdfa3a21a9b10660ed14d17cd539864789","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-05-01T08:05:09Z","title_canon_sha256":"d6a7fcf6748cc2089a81a271926a15af9971961841eaeea57905ab92f78acc0d"},"schema_version":"1.0","source":{"id":"1805.00228","kind":"arxiv","version":2}},"canonical_sha256":"a7a78f576821ebf2ebdfff0d6c74501e70ba96b8a0357d15b5821ff924c47117","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7a78f576821ebf2ebdfff0d6c74501e70ba96b8a0357d15b5821ff924c47117","first_computed_at":"2026-05-18T00:05:31.331604Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:31.331604Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nDRJdLPRi+Y91gWWxd7i0FbAMGwF6MYjzluLwZV6+2YE/uuIhe8TkzWHuWaiytFWpva6CI19UqQyB0jCuq2TCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:31.332067Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.00228","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2d151dbcbe6d3c0878a7f490646fc8eaf94d2b3a11e3d75209f81f28339951b","sha256:527990f6711b5b271eb0010b9bcffba0f5f59537e8a9144da4f6ee82b598aa3f"],"state_sha256":"5d4d5e39c17611dc6c729402623b174c34a08994bbc427cc3858e736834be3d7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xUTHgcKowF0M3F0EDskdtaoD0K5wxQ28Oc1HgiC/9C40OwkNrB6NFuMbh5HqlHMsXVGZD9bfD5/cq8VSAcOcAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T15:30:55.550011Z","bundle_sha256":"6f7bc047c9f1d1e8aa0d96874e7fc1e9a20dea215cfd6b4c6d1e78c6fc6494a0"}}