{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:VPC72M6MLCLM24HK4NG4QC6HB6","short_pith_number":"pith:VPC72M6M","schema_version":"1.0","canonical_sha256":"abc5fd33cc5896cd70eae34dc80bc70f954c5c77e665b5aef551044775af4fbd","source":{"kind":"arxiv","id":"1712.07535","version":2},"attestation_state":"computed","paper":{"title":"FUV line emission, gas kinematics, and discovery of [Fe XXI] $\\lambda$1354.1 in the sightline towards a filament in M87","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Michael E. Anderson, Rashid Sunyaev","submitted_at":"2017-12-20T15:44:45Z","abstract_excerpt":"We present new HST-COS G130M spectroscopy for a sightline toward a filament projected 1.9 kpc from the nucleus of M87. The combination of the sensitivity of COS and the proximity of M87 allows us to study the structure of this filament in unparalleled detail. We propose that the filament is composed of many cold clumps, each surrounded by an FUV-emitting boundary layer, with the filament having a radius $r_c \\sim 10$ pc and the clumps filling the cylinder with a low volume filling factor. The observed velocity dispersion in emission lines from the filament results from the random motions of th"},"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":"1712.07535","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-20T15:44:45Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"1c74291e26825468768bd23e0efff650c7124c0eb4b81c31ed9d7152188f09ff","abstract_canon_sha256":"7ed3fc36afbbf383bb4bffeb4dfa614cab2748b9c3f4e1b3c3d5d7c1c01eebd6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:17.725253Z","signature_b64":"36TO1zLz+uCu9JrW/P9JW4bkpJnHRnQoZ7UQ2vHzY2D2sD2ERfbZSLuwn+8HdXkMJYebLqmfklumy/i6A+L7Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"abc5fd33cc5896cd70eae34dc80bc70f954c5c77e665b5aef551044775af4fbd","last_reissued_at":"2026-05-18T00:04:17.724447Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:17.724447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"FUV line emission, gas kinematics, and discovery of [Fe XXI] $\\lambda$1354.1 in the sightline towards a filament in M87","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Michael E. Anderson, Rashid Sunyaev","submitted_at":"2017-12-20T15:44:45Z","abstract_excerpt":"We present new HST-COS G130M spectroscopy for a sightline toward a filament projected 1.9 kpc from the nucleus of M87. The combination of the sensitivity of COS and the proximity of M87 allows us to study the structure of this filament in unparalleled detail. We propose that the filament is composed of many cold clumps, each surrounded by an FUV-emitting boundary layer, with the filament having a radius $r_c \\sim 10$ pc and the clumps filling the cylinder with a low volume filling factor. The observed velocity dispersion in emission lines from the filament results from the random motions of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.07535","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1712.07535","created_at":"2026-05-18T00:04:17.724576+00:00"},{"alias_kind":"arxiv_version","alias_value":"1712.07535v2","created_at":"2026-05-18T00:04:17.724576+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.07535","created_at":"2026-05-18T00:04:17.724576+00:00"},{"alias_kind":"pith_short_12","alias_value":"VPC72M6MLCLM","created_at":"2026-05-18T12:31:49.984773+00:00"},{"alias_kind":"pith_short_16","alias_value":"VPC72M6MLCLM24HK","created_at":"2026-05-18T12:31:49.984773+00:00"},{"alias_kind":"pith_short_8","alias_value":"VPC72M6M","created_at":"2026-05-18T12:31:49.984773+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/VPC72M6MLCLM24HK4NG4QC6HB6","json":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6.json","graph_json":"https://pith.science/api/pith-number/VPC72M6MLCLM24HK4NG4QC6HB6/graph.json","events_json":"https://pith.science/api/pith-number/VPC72M6MLCLM24HK4NG4QC6HB6/events.json","paper":"https://pith.science/paper/VPC72M6M"},"agent_actions":{"view_html":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6","download_json":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6.json","view_paper":"https://pith.science/paper/VPC72M6M","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1712.07535&json=true","fetch_graph":"https://pith.science/api/pith-number/VPC72M6MLCLM24HK4NG4QC6HB6/graph.json","fetch_events":"https://pith.science/api/pith-number/VPC72M6MLCLM24HK4NG4QC6HB6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6/action/storage_attestation","attest_author":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6/action/author_attestation","sign_citation":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6/action/citation_signature","submit_replication":"https://pith.science/pith/VPC72M6MLCLM24HK4NG4QC6HB6/action/replication_record"}},"created_at":"2026-05-18T00:04:17.724576+00:00","updated_at":"2026-05-18T00:04:17.724576+00:00"}