{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:OXD4IPBWEOCMMD4RRJXHSCLYMH","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":"cb65b86e17e3e78c6951c8ae5dffc93f0756ecd2ab3dce13f6a5478535763113","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-11T22:54:27Z","title_canon_sha256":"3f122e5454b69c1ce4f493c1363b10d2f2c731f7e96d698ac3616eebf5f08b50"},"schema_version":"1.0","source":{"id":"1312.3367","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3367","created_at":"2026-05-18T01:45:51Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3367v1","created_at":"2026-05-18T01:45:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3367","created_at":"2026-05-18T01:45:51Z"},{"alias_kind":"pith_short_12","alias_value":"OXD4IPBWEOCM","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OXD4IPBWEOCMMD4R","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OXD4IPBW","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:7c52dfad998e7aea19d844c05dcfd8afc9a5bcce39a9a2b50cd4ce36de59ba5d","target":"graph","created_at":"2026-05-18T01:45:51Z","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 introduce a deep (670 ks) X-ray survey of the SN1006 remnant from Chandra, plus a deep H-alpha image from the 4m telescope at CTIO. Comparison with Chandra images from 2003 gives the first measurement of X-ray proper motions around the entire rim. We find that the expansion velocity varies significantly with azimuth: the highest velocity of ~7400 km/s (almost 2.5 times that in the NW) is found along the SE rim, where both kinematics and spectra indicate that most of the X-rays stem from undecelerated ejecta. Asymmetries in the distribution of ejecta are seen on a variety of spatial scales. ","authors_text":"Brian J. Williams, Knox S. Long, P. Frank Winkler, Satoru Katsuda, Stephen P. Reynolds Robert Petre, Una Hwang","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-11T22:54:27Z","title":"A High-Resolution X-Ray and Optical Study of SN 1006: Asymmetric Expansion and Small-Scale Structure in a Type Ia Supernova Remnant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3367","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":"sha256:8a926f643a7f69413f3e4933458c796a0da2c09f8c0706e05e6d62da85ca3262","target":"record","created_at":"2026-05-18T01:45:51Z","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":"cb65b86e17e3e78c6951c8ae5dffc93f0756ecd2ab3dce13f6a5478535763113","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-12-11T22:54:27Z","title_canon_sha256":"3f122e5454b69c1ce4f493c1363b10d2f2c731f7e96d698ac3616eebf5f08b50"},"schema_version":"1.0","source":{"id":"1312.3367","kind":"arxiv","version":1}},"canonical_sha256":"75c7c43c362384c60f918a6e79097861c7c8fa57796de0ecd0393c9352a678f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75c7c43c362384c60f918a6e79097861c7c8fa57796de0ecd0393c9352a678f7","first_computed_at":"2026-05-18T01:45:51.380278Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:51.380278Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qh+rURRoCdAyMsiEKQBh45fieuzkgY9i2Hmh3b0x7/ntATaAnqHzsDzbD/HAiI/cenoBEAZ+dTV/f5y0y3idBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:51.380730Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.3367","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a926f643a7f69413f3e4933458c796a0da2c09f8c0706e05e6d62da85ca3262","sha256:7c52dfad998e7aea19d844c05dcfd8afc9a5bcce39a9a2b50cd4ce36de59ba5d"],"state_sha256":"4a9545039c83dc3b466c8c83e50db36ba0551e550c30d5ada9abc99a9c8ca930"}