{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:4A2BRA4ZZBJ2I652PDEA4QFFEV","short_pith_number":"pith:4A2BRA4Z","canonical_record":{"source":{"id":"1706.08826","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-27T13:03:57Z","cross_cats_sorted":[],"title_canon_sha256":"940b50db51bf7d894c517a188a7bac4f30eba3861ddfdd66d481695f7b876016","abstract_canon_sha256":"6fb787fea5926d0b8dfff161cf2b07468243f325a741592328e562f499a7b79d"},"schema_version":"1.0"},"canonical_sha256":"e034188399c853a47bba78c80e40a525780a7711fcda38880d7c2c6e2885cf1d","source":{"kind":"arxiv","id":"1706.08826","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.08826","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"arxiv_version","alias_value":"1706.08826v2","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.08826","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"pith_short_12","alias_value":"4A2BRA4ZZBJ2","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"4A2BRA4ZZBJ2I652","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"4A2BRA4Z","created_at":"2026-05-18T12:30:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:4A2BRA4ZZBJ2I652PDEA4QFFEV","target":"record","payload":{"canonical_record":{"source":{"id":"1706.08826","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-27T13:03:57Z","cross_cats_sorted":[],"title_canon_sha256":"940b50db51bf7d894c517a188a7bac4f30eba3861ddfdd66d481695f7b876016","abstract_canon_sha256":"6fb787fea5926d0b8dfff161cf2b07468243f325a741592328e562f499a7b79d"},"schema_version":"1.0"},"canonical_sha256":"e034188399c853a47bba78c80e40a525780a7711fcda38880d7c2c6e2885cf1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:43.406922Z","signature_b64":"AjMojj7OLqQ13c8W1t2kfIQABSmScNNYk4wyBLEVlANMUmPCyadwahXm1GJ2GSDvjArO1lXnnTdXWx8xeOSBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e034188399c853a47bba78c80e40a525780a7711fcda38880d7c2c6e2885cf1d","last_reissued_at":"2026-05-18T00:11:43.406338Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:43.406338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.08826","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":"2026-05-18T00:11:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rsxnv6xfwDiq5MlBgjwoWwq99mfqO9aUVG/vuratGuEOK1Kwri9Qe5dJ9dYKm0Q0H+LuBV6OSEs9m84nyCkMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:15:54.592053Z"},"content_sha256":"27fdebb0d554638aa8ff94d5423372b3d925ec7b23a24cf9a184b7d36783367e","schema_version":"1.0","event_id":"sha256:27fdebb0d554638aa8ff94d5423372b3d925ec7b23a24cf9a184b7d36783367e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:4A2BRA4ZZBJ2I652PDEA4QFFEV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Investigating Galactic supernova remnant candidates with LOFAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Jacco Vink, Jason W. T. Hessels, Joseph D. Gelfand, Laura N. Driessen, Maria Arias, Vladim\\'ir Dom\\v{c}ek","submitted_at":"2017-06-27T13:03:57Z","abstract_excerpt":"We investigate six supernova remnant (SNR) candidates --- G51.21+0.11, G52.37-0.70, G53.07+0.49, G53.41+0.03, G53.84-0.75, and the possible shell around G54.1-0.3 --- in the Galactic Plane using newly acquired LOw-Frequency ARray (LOFAR) High-Band Antenna (HBA) observations, as well as archival Westerbork Synthesis Radio Telescope (WSRT) and Very Large Array Galactic Plane Survey (VGPS) mosaics. We find that G52.37-0.70, G53.84-0.75, and the possible shell around pulsar wind nebula G54.1+0.3 are unlikely to be SNRs, while G53.07+0.49 remains a candidate SNR. G51.21+0.11 has a spectral index of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.08826","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":"2026-05-18T00:11:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BRIMBBCOaPcrERWVeElUpgtKuKr3wpGFRS/njyTIiScguBFb6PyMC30f0dh5x0P+VG22ly61biGlmobzgb9SCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:15:54.592731Z"},"content_sha256":"8a790c4093897cf8c43cb301b6021e60b109246646c0de1caf3948368fe84786","schema_version":"1.0","event_id":"sha256:8a790c4093897cf8c43cb301b6021e60b109246646c0de1caf3948368fe84786"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/bundle.json","state_url":"https://pith.science/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/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":"2026-05-26T20:15:54Z","links":{"resolver":"https://pith.science/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV","bundle":"https://pith.science/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/bundle.json","state":"https://pith.science/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4A2BRA4ZZBJ2I652PDEA4QFFEV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:4A2BRA4ZZBJ2I652PDEA4QFFEV","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":"6fb787fea5926d0b8dfff161cf2b07468243f325a741592328e562f499a7b79d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-27T13:03:57Z","title_canon_sha256":"940b50db51bf7d894c517a188a7bac4f30eba3861ddfdd66d481695f7b876016"},"schema_version":"1.0","source":{"id":"1706.08826","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.08826","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"arxiv_version","alias_value":"1706.08826v2","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.08826","created_at":"2026-05-18T00:11:43Z"},{"alias_kind":"pith_short_12","alias_value":"4A2BRA4ZZBJ2","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"4A2BRA4ZZBJ2I652","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"4A2BRA4Z","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:8a790c4093897cf8c43cb301b6021e60b109246646c0de1caf3948368fe84786","target":"graph","created_at":"2026-05-18T00:11:43Z","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 investigate six supernova remnant (SNR) candidates --- G51.21+0.11, G52.37-0.70, G53.07+0.49, G53.41+0.03, G53.84-0.75, and the possible shell around G54.1-0.3 --- in the Galactic Plane using newly acquired LOw-Frequency ARray (LOFAR) High-Band Antenna (HBA) observations, as well as archival Westerbork Synthesis Radio Telescope (WSRT) and Very Large Array Galactic Plane Survey (VGPS) mosaics. We find that G52.37-0.70, G53.84-0.75, and the possible shell around pulsar wind nebula G54.1+0.3 are unlikely to be SNRs, while G53.07+0.49 remains a candidate SNR. G51.21+0.11 has a spectral index of","authors_text":"Jacco Vink, Jason W. T. Hessels, Joseph D. Gelfand, Laura N. Driessen, Maria Arias, Vladim\\'ir Dom\\v{c}ek","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-27T13:03:57Z","title":"Investigating Galactic supernova remnant candidates with LOFAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.08826","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":"sha256:27fdebb0d554638aa8ff94d5423372b3d925ec7b23a24cf9a184b7d36783367e","target":"record","created_at":"2026-05-18T00:11:43Z","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":"6fb787fea5926d0b8dfff161cf2b07468243f325a741592328e562f499a7b79d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-27T13:03:57Z","title_canon_sha256":"940b50db51bf7d894c517a188a7bac4f30eba3861ddfdd66d481695f7b876016"},"schema_version":"1.0","source":{"id":"1706.08826","kind":"arxiv","version":2}},"canonical_sha256":"e034188399c853a47bba78c80e40a525780a7711fcda38880d7c2c6e2885cf1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e034188399c853a47bba78c80e40a525780a7711fcda38880d7c2c6e2885cf1d","first_computed_at":"2026-05-18T00:11:43.406338Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:43.406338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AjMojj7OLqQ13c8W1t2kfIQABSmScNNYk4wyBLEVlANMUmPCyadwahXm1GJ2GSDvjArO1lXnnTdXWx8xeOSBBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:43.406922Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.08826","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:27fdebb0d554638aa8ff94d5423372b3d925ec7b23a24cf9a184b7d36783367e","sha256:8a790c4093897cf8c43cb301b6021e60b109246646c0de1caf3948368fe84786"],"state_sha256":"73ad2f3b830f57e6f0d48b81d9bbc2e49db4dd70f86e7e56609bb363f94cb6a9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EQ+MBDYa0smYM/EJsd82/Joq1d3Y2rd7HNYULLPy55XjFMiq8nrJOSh6X70YmOPReaXnWdYsmLwSkY1ugHciCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:15:54.600084Z","bundle_sha256":"258ad3d6b5a67c0159c14cc8416ee2c9cc861dc45b103f278369d66235fca5bc"}}