{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:PYX54JHFNOYLXHHYNGIH3OFZQI","short_pith_number":"pith:PYX54JHF","canonical_record":{"source":{"id":"1202.5248","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-23T18:02:32Z","cross_cats_sorted":[],"title_canon_sha256":"a1666c4328a62dbb0c9e14ea55d3d269394008bb129db2b7338f12451d8fa975","abstract_canon_sha256":"b43c3d7f58c93dad730cb5512c3a3cc2de0ac1da60480fbc554bdbfdbcd7b539"},"schema_version":"1.0"},"canonical_sha256":"7e2fde24e56bb0bb9cf869907db8b9821ad4654541216d76b6b057f5e6062af0","source":{"kind":"arxiv","id":"1202.5248","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5248","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5248v1","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5248","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"PYX54JHFNOYL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PYX54JHFNOYLXHHY","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PYX54JHF","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:PYX54JHFNOYLXHHYNGIH3OFZQI","target":"record","payload":{"canonical_record":{"source":{"id":"1202.5248","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-23T18:02:32Z","cross_cats_sorted":[],"title_canon_sha256":"a1666c4328a62dbb0c9e14ea55d3d269394008bb129db2b7338f12451d8fa975","abstract_canon_sha256":"b43c3d7f58c93dad730cb5512c3a3cc2de0ac1da60480fbc554bdbfdbcd7b539"},"schema_version":"1.0"},"canonical_sha256":"7e2fde24e56bb0bb9cf869907db8b9821ad4654541216d76b6b057f5e6062af0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:20.284564Z","signature_b64":"SFxaUjRPTLXsR8IMVHALFaGk/TgMFuwEtnJvYIE4Bur5v1SxRiJ1cK4BCgt/ZmwqCa5CQxkwjZPbAv0DLl0wCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e2fde24e56bb0bb9cf869907db8b9821ad4654541216d76b6b057f5e6062af0","last_reissued_at":"2026-05-18T01:58:20.284067Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:20.284067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.5248","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":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DZ7aRMBlFOUwkFq6Oiuyc28LDR7c8Bdp3pmdW8OHjZn2D3K75r9qjInd8vc+TDrCIvD0uMqr1ybUNk8hwScLAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:46:50.106957Z"},"content_sha256":"4d9d6739b0a5fbc4c9ba230d5511c3e0e0f04bf40c9bb63f23f924c987da0da3","schema_version":"1.0","event_id":"sha256:4d9d6739b0a5fbc4c9ba230d5511c3e0e0f04bf40c9bb63f23f924c987da0da3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:PYX54JHFNOYLXHHYNGIH3OFZQI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Physical Structure and Nature of Supernova Remnants in M101","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) Morehead State University, (3) Johns Hopkins University, (4) University of Virginia, 5), (5) MPIfR, (6) Northern Illinois University), B. C. Dunne (1), C.-H. R. Chen (4, C. K. Grimes (2), K. D. Kuntz (3), N. A. Franchetti (1), R. A. Gruendl (1), T. G. Pannuti (2), T. M. Aldridge (6) ((1) University of Illinois, Y.-H. Chu (1)","submitted_at":"2012-02-23T18:02:32Z","abstract_excerpt":"Supernova remnant (SNR) candidates in the giant spiral galaxy M101 have been previously identified from ground-based H-alpha and [SII] images. We have used archival Hubble Space Telescope (HST) H-alpha and broad-band images as well as stellar photometry of 55 SNR candidates to examine their physical structure, interstellar environment, and underlying stellar population. We have also obtained high-dispersion echelle spectra to search for shocked high-velocity gas in 18 SNR candidates, and identified X-ray counterparts to SNR candidates using data from archival observations made by the Chandra X"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5248","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":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nc0bNOxDtLIEsm7GWlWVbH3dFylia8aGuWxNcNgzVYvrPmY7qSlTIZTn5NncIISgI+onj+H6p6FlszQPwk22Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:46:50.107301Z"},"content_sha256":"76df4414a3784bbb573a136a9608a681b9d43caf74aa3e3fab97ca1a1b3aa14e","schema_version":"1.0","event_id":"sha256:76df4414a3784bbb573a136a9608a681b9d43caf74aa3e3fab97ca1a1b3aa14e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/bundle.json","state_url":"https://pith.science/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/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":"2026-06-02T01:46:50Z","links":{"resolver":"https://pith.science/pith/PYX54JHFNOYLXHHYNGIH3OFZQI","bundle":"https://pith.science/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/bundle.json","state":"https://pith.science/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PYX54JHFNOYLXHHYNGIH3OFZQI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:PYX54JHFNOYLXHHYNGIH3OFZQI","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":"b43c3d7f58c93dad730cb5512c3a3cc2de0ac1da60480fbc554bdbfdbcd7b539","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-23T18:02:32Z","title_canon_sha256":"a1666c4328a62dbb0c9e14ea55d3d269394008bb129db2b7338f12451d8fa975"},"schema_version":"1.0","source":{"id":"1202.5248","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5248","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5248v1","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5248","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"PYX54JHFNOYL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PYX54JHFNOYLXHHY","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PYX54JHF","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:76df4414a3784bbb573a136a9608a681b9d43caf74aa3e3fab97ca1a1b3aa14e","target":"graph","created_at":"2026-05-18T01:58:20Z","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) candidates in the giant spiral galaxy M101 have been previously identified from ground-based H-alpha and [SII] images. We have used archival Hubble Space Telescope (HST) H-alpha and broad-band images as well as stellar photometry of 55 SNR candidates to examine their physical structure, interstellar environment, and underlying stellar population. We have also obtained high-dispersion echelle spectra to search for shocked high-velocity gas in 18 SNR candidates, and identified X-ray counterparts to SNR candidates using data from archival observations made by the Chandra X","authors_text":"(2) Morehead State University, (3) Johns Hopkins University, (4) University of Virginia, 5), (5) MPIfR, (6) Northern Illinois University), B. C. Dunne (1), C.-H. R. Chen (4, C. K. Grimes (2), K. D. Kuntz (3), N. A. Franchetti (1), R. A. Gruendl (1), T. G. Pannuti (2), T. M. Aldridge (6) ((1) University of Illinois, Y.-H. Chu (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-23T18:02:32Z","title":"Physical Structure and Nature of Supernova Remnants in M101"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5248","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":"sha256:4d9d6739b0a5fbc4c9ba230d5511c3e0e0f04bf40c9bb63f23f924c987da0da3","target":"record","created_at":"2026-05-18T01:58:20Z","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":"b43c3d7f58c93dad730cb5512c3a3cc2de0ac1da60480fbc554bdbfdbcd7b539","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-23T18:02:32Z","title_canon_sha256":"a1666c4328a62dbb0c9e14ea55d3d269394008bb129db2b7338f12451d8fa975"},"schema_version":"1.0","source":{"id":"1202.5248","kind":"arxiv","version":1}},"canonical_sha256":"7e2fde24e56bb0bb9cf869907db8b9821ad4654541216d76b6b057f5e6062af0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e2fde24e56bb0bb9cf869907db8b9821ad4654541216d76b6b057f5e6062af0","first_computed_at":"2026-05-18T01:58:20.284067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:20.284067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SFxaUjRPTLXsR8IMVHALFaGk/TgMFuwEtnJvYIE4Bur5v1SxRiJ1cK4BCgt/ZmwqCa5CQxkwjZPbAv0DLl0wCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:20.284564Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.5248","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d9d6739b0a5fbc4c9ba230d5511c3e0e0f04bf40c9bb63f23f924c987da0da3","sha256:76df4414a3784bbb573a136a9608a681b9d43caf74aa3e3fab97ca1a1b3aa14e"],"state_sha256":"6b1a1210da8af686366bff0dbe1d4d1dac18670aa6f96d165bdd9eebe9143d2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6HHXfqWzBb6tVK6kaQz6E7JfxdJsCl6mUFvh731EkBgg1AGzZS9/ymw6Sn2VzdTCyc+nr/ypTWHFGn3WTUKLBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:46:50.112102Z","bundle_sha256":"6f70154386633648a4891c7d3159f9edecdd14e4dc79fd008d505c7b37f024ac"}}