{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K","short_pith_number":"pith:VZ2VPPHJ","canonical_record":{"source":{"id":"1203.5603","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-26T08:57:45Z","cross_cats_sorted":[],"title_canon_sha256":"aaeb992772c708bba73eddee1c1cb4f9cd6c53b81285beb317f5381458348832","abstract_canon_sha256":"e7ec249cd5fa177f53e39da975ff0e8a793bab11c70a89de6db451372b30a5ea"},"schema_version":"1.0"},"canonical_sha256":"ae7557bce9da91dcd883a2331e0e30daab24bdd846242a0c5d2f9dd9aaae5181","source":{"kind":"arxiv","id":"1203.5603","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.5603","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"1203.5603v1","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.5603","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"VZ2VPPHJ3KI5","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VZ2VPPHJ3KI5ZWED","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VZ2VPPHJ","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K","target":"record","payload":{"canonical_record":{"source":{"id":"1203.5603","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-26T08:57:45Z","cross_cats_sorted":[],"title_canon_sha256":"aaeb992772c708bba73eddee1c1cb4f9cd6c53b81285beb317f5381458348832","abstract_canon_sha256":"e7ec249cd5fa177f53e39da975ff0e8a793bab11c70a89de6db451372b30a5ea"},"schema_version":"1.0"},"canonical_sha256":"ae7557bce9da91dcd883a2331e0e30daab24bdd846242a0c5d2f9dd9aaae5181","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:01.903487Z","signature_b64":"XcT1gIXy9K3RDwDS4Il4W8XHpJfYEX+NTvqYtyYOpnCVsWzpkhV+lSl+Xn86jpDEczrGrvjqrQaaBesb7wmaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae7557bce9da91dcd883a2331e0e30daab24bdd846242a0c5d2f9dd9aaae5181","last_reissued_at":"2026-05-18T01:58:01.902915Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:01.902915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.5603","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":"2026-05-18T01:58:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yimkvuA+S6OA9QsHG9IlIzGcetU2suD2i0W8Xt4Uh0amjIn5Uz9zZ5P5D20K+NZYKwn4GwT5xoMoY5Y6GMfNDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:52:30.066816Z"},"content_sha256":"ed8d92f9fc1f75f3595ea34e6e0dd4ddd9d1511ea9409620277e8afc7bc01792","schema_version":"1.0","event_id":"sha256:ed8d92f9fc1f75f3595ea34e6e0dd4ddd9d1511ea9409620277e8afc7bc01792"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An absorption-selected survey of neutral gas in the Milky Way halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. Winkel, J. Kerp, M. T. Murphy, N. Ben Bekhti, P. Richter, U. Klein","submitted_at":"2012-03-26T08:57:45Z","abstract_excerpt":"We aim at analysing systematically the distribution and physical properties of neutral and mildly ionised gas in the Milky Way halo, based on a large absorption-selected data set. Multi-wavelength studies were performed combining optical absorption line data of CaII and NaI with follow-up HI 21-cm emission line observations along 408 sight lines towards low- and high-redshift QSOs. We made use of archival optical spectra obtained with UVES/VLT. HI data were extracted from the Effelsberg-Bonn HI survey and the Galactic All-Sky survey. For selected sight lines we obtained deeper follow-up observ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.5603","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":"2026-05-18T01:58:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dQzbElNYXKJypf8niBoje9O5RHnMwLzW5KoF8MZ4EchkD2PeO/8pvlvmbhj5AG+pDX0U8cPJSRAedm2xakLSBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:52:30.067167Z"},"content_sha256":"6f32a203638154355a86d7c7b0b8e29509d4219ba9d8c49ea6cc7310ee907ac8","schema_version":"1.0","event_id":"sha256:6f32a203638154355a86d7c7b0b8e29509d4219ba9d8c49ea6cc7310ee907ac8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/bundle.json","state_url":"https://pith.science/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/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":"2026-05-29T17:52:30Z","links":{"resolver":"https://pith.science/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K","bundle":"https://pith.science/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/bundle.json","state":"https://pith.science/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VZ2VPPHJ3KI5ZWEDUIZR4DRQ3K","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":"e7ec249cd5fa177f53e39da975ff0e8a793bab11c70a89de6db451372b30a5ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-26T08:57:45Z","title_canon_sha256":"aaeb992772c708bba73eddee1c1cb4f9cd6c53b81285beb317f5381458348832"},"schema_version":"1.0","source":{"id":"1203.5603","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.5603","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"1203.5603v1","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.5603","created_at":"2026-05-18T01:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"VZ2VPPHJ3KI5","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VZ2VPPHJ3KI5ZWED","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VZ2VPPHJ","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:6f32a203638154355a86d7c7b0b8e29509d4219ba9d8c49ea6cc7310ee907ac8","target":"graph","created_at":"2026-05-18T01:58:01Z","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 aim at analysing systematically the distribution and physical properties of neutral and mildly ionised gas in the Milky Way halo, based on a large absorption-selected data set. Multi-wavelength studies were performed combining optical absorption line data of CaII and NaI with follow-up HI 21-cm emission line observations along 408 sight lines towards low- and high-redshift QSOs. We made use of archival optical spectra obtained with UVES/VLT. HI data were extracted from the Effelsberg-Bonn HI survey and the Galactic All-Sky survey. For selected sight lines we obtained deeper follow-up observ","authors_text":"B. Winkel, J. Kerp, M. T. Murphy, N. Ben Bekhti, P. Richter, U. Klein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-26T08:57:45Z","title":"An absorption-selected survey of neutral gas in the Milky Way halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.5603","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:ed8d92f9fc1f75f3595ea34e6e0dd4ddd9d1511ea9409620277e8afc7bc01792","target":"record","created_at":"2026-05-18T01:58:01Z","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":"e7ec249cd5fa177f53e39da975ff0e8a793bab11c70a89de6db451372b30a5ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-26T08:57:45Z","title_canon_sha256":"aaeb992772c708bba73eddee1c1cb4f9cd6c53b81285beb317f5381458348832"},"schema_version":"1.0","source":{"id":"1203.5603","kind":"arxiv","version":1}},"canonical_sha256":"ae7557bce9da91dcd883a2331e0e30daab24bdd846242a0c5d2f9dd9aaae5181","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae7557bce9da91dcd883a2331e0e30daab24bdd846242a0c5d2f9dd9aaae5181","first_computed_at":"2026-05-18T01:58:01.902915Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:01.902915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XcT1gIXy9K3RDwDS4Il4W8XHpJfYEX+NTvqYtyYOpnCVsWzpkhV+lSl+Xn86jpDEczrGrvjqrQaaBesb7wmaAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:01.903487Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.5603","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed8d92f9fc1f75f3595ea34e6e0dd4ddd9d1511ea9409620277e8afc7bc01792","sha256:6f32a203638154355a86d7c7b0b8e29509d4219ba9d8c49ea6cc7310ee907ac8"],"state_sha256":"830057f9858a1af7669259a069053c1bfd55b7079ff3029d90da018e104d64ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5tNkTCLLLCpkey2appGC/meYaQJKp0juX7h5TuBfWWEmvFTX0NM3++7J4JnasHAzZQGNYm1WXWJpy0cU/stIAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:52:30.069075Z","bundle_sha256":"c53ed9bfde2c5ae34e34cbab34d737362715ef7f1e11e00343ed73f962b7ece7"}}