{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:FCSIPRVR3UIDGZFJLAII433VTI","short_pith_number":"pith:FCSIPRVR","canonical_record":{"source":{"id":"1305.0567","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-05-02T20:01:49Z","cross_cats_sorted":[],"title_canon_sha256":"c43d1f1d9264d7925e35346d4bf8478def74c11318a985d3694806cd72ea311e","abstract_canon_sha256":"709f259ccdefd7923e2ea0c2c6165ced644876e6b80f89f2e9cf9380dca0d5c3"},"schema_version":"1.0"},"canonical_sha256":"28a487c6b1dd103364a958108e6f759a00ba132e13550cf424d305bebc62fa1b","source":{"kind":"arxiv","id":"1305.0567","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.0567","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"arxiv_version","alias_value":"1305.0567v1","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.0567","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"pith_short_12","alias_value":"FCSIPRVR3UID","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FCSIPRVR3UIDGZFJ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FCSIPRVR","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:FCSIPRVR3UIDGZFJLAII433VTI","target":"record","payload":{"canonical_record":{"source":{"id":"1305.0567","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-05-02T20:01:49Z","cross_cats_sorted":[],"title_canon_sha256":"c43d1f1d9264d7925e35346d4bf8478def74c11318a985d3694806cd72ea311e","abstract_canon_sha256":"709f259ccdefd7923e2ea0c2c6165ced644876e6b80f89f2e9cf9380dca0d5c3"},"schema_version":"1.0"},"canonical_sha256":"28a487c6b1dd103364a958108e6f759a00ba132e13550cf424d305bebc62fa1b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:13.019607Z","signature_b64":"X4rLpamffq+XiBtL6qtQlsLKSfAlfrhov+ggPu67vyJvD0PvwJ97QCn7q8Nlo45Mc+gcXC2gs5ZPAJjHxYrsDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"28a487c6b1dd103364a958108e6f759a00ba132e13550cf424d305bebc62fa1b","last_reissued_at":"2026-05-18T01:50:13.018939Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:13.018939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.0567","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":"2026-05-18T01:50:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eTW3HYzTEmMiF4+umKDNnvTvpCmqwbuYr4/TBIHu0tJ+wf9lVSFwpB/NszU6zt5hGn43xWrWggXqzIAXrtPXCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:35:33.431712Z"},"content_sha256":"773cc623c452cb61e40b2a2831d5915104521d94b97f16fa0e77bf0ee04e6b63","schema_version":"1.0","event_id":"sha256:773cc623c452cb61e40b2a2831d5915104521d94b97f16fa0e77bf0ee04e6b63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:FCSIPRVR3UIDGZFJLAII433VTI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Azimuthal Density Variations Around the Rim of Tycho's Supernova Remnant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Brian J. Williams, John M. Blondin, John W. Hewitt, Kazimierz J. Borkowski, Parviz Ghavamian, Robert Petre, S. Alwin Mao, Stephen P. Reynolds","submitted_at":"2013-05-02T20:01:49Z","abstract_excerpt":"{\\it Spitzer} images of Tycho's supernova remnant in the mid-infrared reveal limb-brightened emission from the entire periphery of the shell and faint filamentary structures in the interior. As with other young remnants, this emission is produced by dust grains, warmed to $\\sim 100$ K in the post-shock environment by collisions with energetic electrons and ions. The ratio of the 70 to 24 $\\mu$m fluxes is a diagnostic of the dust temperature, which in turn is a sensitive function of the plasma density. We find significant variations in the 70/24 flux ratio around the periphery of Tycho's forwar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.0567","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":"2026-05-18T01:50:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SulWIByRuEBUhSQjXe9D6OUzPJ43X7jbYQPmoEDAlTGG9D1danQZ/dcCe3/WErlRrjeij/DgHG0veithBA69Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:35:33.432458Z"},"content_sha256":"1d95c7ae6f7031acf5c5f430a101383b35ac1f6d0226642f47a07cafd9002f29","schema_version":"1.0","event_id":"sha256:1d95c7ae6f7031acf5c5f430a101383b35ac1f6d0226642f47a07cafd9002f29"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FCSIPRVR3UIDGZFJLAII433VTI/bundle.json","state_url":"https://pith.science/pith/FCSIPRVR3UIDGZFJLAII433VTI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FCSIPRVR3UIDGZFJLAII433VTI/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":"2026-05-25T21:35:33Z","links":{"resolver":"https://pith.science/pith/FCSIPRVR3UIDGZFJLAII433VTI","bundle":"https://pith.science/pith/FCSIPRVR3UIDGZFJLAII433VTI/bundle.json","state":"https://pith.science/pith/FCSIPRVR3UIDGZFJLAII433VTI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FCSIPRVR3UIDGZFJLAII433VTI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FCSIPRVR3UIDGZFJLAII433VTI","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":"709f259ccdefd7923e2ea0c2c6165ced644876e6b80f89f2e9cf9380dca0d5c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-05-02T20:01:49Z","title_canon_sha256":"c43d1f1d9264d7925e35346d4bf8478def74c11318a985d3694806cd72ea311e"},"schema_version":"1.0","source":{"id":"1305.0567","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.0567","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"arxiv_version","alias_value":"1305.0567v1","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.0567","created_at":"2026-05-18T01:50:13Z"},{"alias_kind":"pith_short_12","alias_value":"FCSIPRVR3UID","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FCSIPRVR3UIDGZFJ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FCSIPRVR","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:1d95c7ae6f7031acf5c5f430a101383b35ac1f6d0226642f47a07cafd9002f29","target":"graph","created_at":"2026-05-18T01:50:13Z","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":"{\\it Spitzer} images of Tycho's supernova remnant in the mid-infrared reveal limb-brightened emission from the entire periphery of the shell and faint filamentary structures in the interior. As with other young remnants, this emission is produced by dust grains, warmed to $\\sim 100$ K in the post-shock environment by collisions with energetic electrons and ions. The ratio of the 70 to 24 $\\mu$m fluxes is a diagnostic of the dust temperature, which in turn is a sensitive function of the plasma density. We find significant variations in the 70/24 flux ratio around the periphery of Tycho's forwar","authors_text":"Brian J. Williams, John M. Blondin, John W. Hewitt, Kazimierz J. Borkowski, Parviz Ghavamian, Robert Petre, S. Alwin Mao, Stephen P. Reynolds","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-05-02T20:01:49Z","title":"Azimuthal Density Variations Around the Rim of Tycho's Supernova Remnant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.0567","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":"sha256:773cc623c452cb61e40b2a2831d5915104521d94b97f16fa0e77bf0ee04e6b63","target":"record","created_at":"2026-05-18T01:50:13Z","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":"709f259ccdefd7923e2ea0c2c6165ced644876e6b80f89f2e9cf9380dca0d5c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-05-02T20:01:49Z","title_canon_sha256":"c43d1f1d9264d7925e35346d4bf8478def74c11318a985d3694806cd72ea311e"},"schema_version":"1.0","source":{"id":"1305.0567","kind":"arxiv","version":1}},"canonical_sha256":"28a487c6b1dd103364a958108e6f759a00ba132e13550cf424d305bebc62fa1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"28a487c6b1dd103364a958108e6f759a00ba132e13550cf424d305bebc62fa1b","first_computed_at":"2026-05-18T01:50:13.018939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:13.018939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X4rLpamffq+XiBtL6qtQlsLKSfAlfrhov+ggPu67vyJvD0PvwJ97QCn7q8Nlo45Mc+gcXC2gs5ZPAJjHxYrsDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:13.019607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.0567","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:773cc623c452cb61e40b2a2831d5915104521d94b97f16fa0e77bf0ee04e6b63","sha256:1d95c7ae6f7031acf5c5f430a101383b35ac1f6d0226642f47a07cafd9002f29"],"state_sha256":"e6d7a4f04af09a5912c8aa645138b60ddb6463f62eb02ec985e555d2590b7e58"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pUMcptHZ79KZpByO1BgtbWu2I9nqdgUcbWSfgl1QKgT3osl8VJzHDbpOsWZHuet76kIxwImhJD+QLP8vQej6CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:35:33.436580Z","bundle_sha256":"18826e62bb161506bab23c5cf96c81260a7a9f602271f908fd4e16de4059cc17"}}