{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:HUOXKVX63AJHMYZX4MEMDUOLOH","short_pith_number":"pith:HUOXKVX6","canonical_record":{"source":{"id":"astro-ph/9809183","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-14T23:40:43Z","cross_cats_sorted":[],"title_canon_sha256":"908248fbc8117a68dace6e443f7bc0b7ea22cd9f9ce6de41ca8932829f9e2e08","abstract_canon_sha256":"4e09fe71e019455965102d2b2f5e3c889a2cfb8e63cf1c9628bcc660d95685d7"},"schema_version":"1.0"},"canonical_sha256":"3d1d7556fed812766337e308c1d1cb71e57dd71674fa985d9a26fe2038ad4fb0","source":{"kind":"arxiv","id":"astro-ph/9809183","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9809183","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9809183v1","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9809183","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"pith_short_12","alias_value":"HUOXKVX63AJH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"HUOXKVX63AJHMYZX","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"HUOXKVX6","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:HUOXKVX63AJHMYZX4MEMDUOLOH","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9809183","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-14T23:40:43Z","cross_cats_sorted":[],"title_canon_sha256":"908248fbc8117a68dace6e443f7bc0b7ea22cd9f9ce6de41ca8932829f9e2e08","abstract_canon_sha256":"4e09fe71e019455965102d2b2f5e3c889a2cfb8e63cf1c9628bcc660d95685d7"},"schema_version":"1.0"},"canonical_sha256":"3d1d7556fed812766337e308c1d1cb71e57dd71674fa985d9a26fe2038ad4fb0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:21.405032Z","signature_b64":"x2/VvaEoLVwABqiJ6dqwgzhh8lfgZrltsOn+KhETWOZAYvGz4uyxCdWiiZ6cVwevP/ewgYhPHOmGmwdJS4o2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d1d7556fed812766337e308c1d1cb71e57dd71674fa985d9a26fe2038ad4fb0","last_reissued_at":"2026-05-18T01:09:21.404566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:21.404566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9809183","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":"2026-05-18T01:09:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LouAiEaEHMYlUPpSJQv4O/qGOl+g5tAeJsMP2tLB8iD9ct9T8sT8x5Az+TEiTbTd1an3/rOismjLqf2+ahTBCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:06:01.265671Z"},"content_sha256":"8041fbe1cb5adb6437d182d1640536fa8a47b6643a5b5cb78af5635e1b9de491","schema_version":"1.0","event_id":"sha256:8041fbe1cb5adb6437d182d1640536fa8a47b6643a5b5cb78af5635e1b9de491"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:HUOXKVX63AJHMYZX4MEMDUOLOH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Distance to the Draco Cloud","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Attard, Christopher R. Burns, Devon Hamilton, Gabriela Mall\\'en-Ornelas, J. L. Karr, L. Felipe Barrientos, Marcin Sawicki, Michael D. Gladders, M. P. Casey, Sara M. Poirier, Stefan W. Mochnacki, T. E. Clarke","submitted_at":"1998-09-14T23:40:43Z","abstract_excerpt":"The understanding of the nature of intermediate and high velocity gas in the Milky Way is hampered by a paucity of distance estimates to individual clouds. A project has been started at the David Dunlap Observatory to address this lack of distance measures by observing early-type stars along the line of sight towards these clouds and searching for sodium doublet absorption at the clouds' systemic velocities. Distances to foreground stars (no absorption) and background stars (with absorption) are estimated from spectroscopic parallax, and thus the distance to the bracketed cloud is estimated. I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9809183","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":"2026-05-18T01:09:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w+OZ44MSVH93Kjfe7JAhlJ1Ta2Oc/ewVY8K3Lrut4xUvsyisFZZynM4/UPvFLaKPMXBoMVdBNX1Py5qQdWjHBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:06:01.266417Z"},"content_sha256":"3e9787e3c148134a8dcb05d208ef2789bf80e797c27c1334c069ce451a7d8424","schema_version":"1.0","event_id":"sha256:3e9787e3c148134a8dcb05d208ef2789bf80e797c27c1334c069ce451a7d8424"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/bundle.json","state_url":"https://pith.science/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/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":"2026-05-31T10:06:01Z","links":{"resolver":"https://pith.science/pith/HUOXKVX63AJHMYZX4MEMDUOLOH","bundle":"https://pith.science/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/bundle.json","state":"https://pith.science/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HUOXKVX63AJHMYZX4MEMDUOLOH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:HUOXKVX63AJHMYZX4MEMDUOLOH","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":"4e09fe71e019455965102d2b2f5e3c889a2cfb8e63cf1c9628bcc660d95685d7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-14T23:40:43Z","title_canon_sha256":"908248fbc8117a68dace6e443f7bc0b7ea22cd9f9ce6de41ca8932829f9e2e08"},"schema_version":"1.0","source":{"id":"astro-ph/9809183","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9809183","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9809183v1","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9809183","created_at":"2026-05-18T01:09:21Z"},{"alias_kind":"pith_short_12","alias_value":"HUOXKVX63AJH","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"HUOXKVX63AJHMYZX","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"HUOXKVX6","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:3e9787e3c148134a8dcb05d208ef2789bf80e797c27c1334c069ce451a7d8424","target":"graph","created_at":"2026-05-18T01:09:21Z","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":"The understanding of the nature of intermediate and high velocity gas in the Milky Way is hampered by a paucity of distance estimates to individual clouds. A project has been started at the David Dunlap Observatory to address this lack of distance measures by observing early-type stars along the line of sight towards these clouds and searching for sodium doublet absorption at the clouds' systemic velocities. Distances to foreground stars (no absorption) and background stars (with absorption) are estimated from spectroscopic parallax, and thus the distance to the bracketed cloud is estimated. I","authors_text":"A. Attard, Christopher R. Burns, Devon Hamilton, Gabriela Mall\\'en-Ornelas, J. L. Karr, L. Felipe Barrientos, Marcin Sawicki, Michael D. Gladders, M. P. Casey, Sara M. Poirier, Stefan W. Mochnacki, T. E. Clarke","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-09-14T23:40:43Z","title":"The Distance to the Draco Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9809183","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":"sha256:8041fbe1cb5adb6437d182d1640536fa8a47b6643a5b5cb78af5635e1b9de491","target":"record","created_at":"2026-05-18T01:09:21Z","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":"4e09fe71e019455965102d2b2f5e3c889a2cfb8e63cf1c9628bcc660d95685d7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-09-14T23:40:43Z","title_canon_sha256":"908248fbc8117a68dace6e443f7bc0b7ea22cd9f9ce6de41ca8932829f9e2e08"},"schema_version":"1.0","source":{"id":"astro-ph/9809183","kind":"arxiv","version":1}},"canonical_sha256":"3d1d7556fed812766337e308c1d1cb71e57dd71674fa985d9a26fe2038ad4fb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d1d7556fed812766337e308c1d1cb71e57dd71674fa985d9a26fe2038ad4fb0","first_computed_at":"2026-05-18T01:09:21.404566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:21.404566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x2/VvaEoLVwABqiJ6dqwgzhh8lfgZrltsOn+KhETWOZAYvGz4uyxCdWiiZ6cVwevP/ewgYhPHOmGmwdJS4o2CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:21.405032Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9809183","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8041fbe1cb5adb6437d182d1640536fa8a47b6643a5b5cb78af5635e1b9de491","sha256:3e9787e3c148134a8dcb05d208ef2789bf80e797c27c1334c069ce451a7d8424"],"state_sha256":"a7206636fdde09fda12ad019798c3cf0151863a7e2012706984e7eabc6b937b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1BOjW+W2/eT2Ffik8UgYhSJJQ2zePsNEjzYXmc/x6mxUJ3PRPoGEqQ79g/S7+dx2YcKw+h0GoL53PGvJrdeLAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:06:01.270954Z","bundle_sha256":"dbfaa8b85eb978872c0c306948c4c1ae9ee54decd2881578804ceb8206af0f46"}}