{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:OV5UFRICXAQJKZC4M5QQKX5C7D","short_pith_number":"pith:OV5UFRIC","schema_version":"1.0","canonical_sha256":"757b42c502b82095645c6761055fa2f8e1ba7c0fed73621a66b902fccf7544ff","source":{"kind":"arxiv","id":"1605.07271","version":1},"attestation_state":"computed","paper":{"title":"Constraining the Age and Distance of the Galactic Supernova Remnant G156.2+5.7 by H-alpha Expansion Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Dan Milisavljevic, Masaomi Tanaka, Robert Fesen, Satoru Katsuda, Tomoki Morokuma","submitted_at":"2016-05-24T02:52:13Z","abstract_excerpt":"We present deep H-alpha images of portions of the X-ray bright but optically faint Galactic supernova remnant G156.2+5.7, revealing numerous and delicately thin nonradiative filaments which mark the location of the remnant's forward shock. These new images show that these filaments have a complex structure not visible on previous lower resolution optical images. By comparing H-alpha images taken in 2004 at the McDonald Observatory and in 2015-2016 at the Kiso Observatory, we set a stringent 1-sigma upper limit of expansion to be 0.06 arcsec/yr. This proper motion, combined with a shock speed o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1605.07271","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-24T02:52:13Z","cross_cats_sorted":[],"title_canon_sha256":"700a0e28ba26a250232a2b159cd13bb63802319194eacf783af2f8fae760cdb4","abstract_canon_sha256":"45dd64bc69a74d87d49aabbeb76187b7c6c22d10a68da642a944ee8614e995c8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:02.871452Z","signature_b64":"Q0Lroi0wGcc8qd9G0HVAmdtofuDbT5USKSdiDts4a6WAnR5ka4sYCp6iCpkBN53nKrgNHWOlwzS10706fb/FAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"757b42c502b82095645c6761055fa2f8e1ba7c0fed73621a66b902fccf7544ff","last_reissued_at":"2026-05-18T01:10:02.870907Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:02.870907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Constraining the Age and Distance of the Galactic Supernova Remnant G156.2+5.7 by H-alpha Expansion Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Dan Milisavljevic, Masaomi Tanaka, Robert Fesen, Satoru Katsuda, Tomoki Morokuma","submitted_at":"2016-05-24T02:52:13Z","abstract_excerpt":"We present deep H-alpha images of portions of the X-ray bright but optically faint Galactic supernova remnant G156.2+5.7, revealing numerous and delicately thin nonradiative filaments which mark the location of the remnant's forward shock. These new images show that these filaments have a complex structure not visible on previous lower resolution optical images. By comparing H-alpha images taken in 2004 at the McDonald Observatory and in 2015-2016 at the Kiso Observatory, we set a stringent 1-sigma upper limit of expansion to be 0.06 arcsec/yr. This proper motion, combined with a shock speed o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.07271","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1605.07271","created_at":"2026-05-18T01:10:02.870981+00:00"},{"alias_kind":"arxiv_version","alias_value":"1605.07271v1","created_at":"2026-05-18T01:10:02.870981+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.07271","created_at":"2026-05-18T01:10:02.870981+00:00"},{"alias_kind":"pith_short_12","alias_value":"OV5UFRICXAQJ","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_16","alias_value":"OV5UFRICXAQJKZC4","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_8","alias_value":"OV5UFRIC","created_at":"2026-05-18T12:30:36.002864+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D","json":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D.json","graph_json":"https://pith.science/api/pith-number/OV5UFRICXAQJKZC4M5QQKX5C7D/graph.json","events_json":"https://pith.science/api/pith-number/OV5UFRICXAQJKZC4M5QQKX5C7D/events.json","paper":"https://pith.science/paper/OV5UFRIC"},"agent_actions":{"view_html":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D","download_json":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D.json","view_paper":"https://pith.science/paper/OV5UFRIC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1605.07271&json=true","fetch_graph":"https://pith.science/api/pith-number/OV5UFRICXAQJKZC4M5QQKX5C7D/graph.json","fetch_events":"https://pith.science/api/pith-number/OV5UFRICXAQJKZC4M5QQKX5C7D/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D/action/storage_attestation","attest_author":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D/action/author_attestation","sign_citation":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D/action/citation_signature","submit_replication":"https://pith.science/pith/OV5UFRICXAQJKZC4M5QQKX5C7D/action/replication_record"}},"created_at":"2026-05-18T01:10:02.870981+00:00","updated_at":"2026-05-18T01:10:02.870981+00:00"}