{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:TJPFEE52GJMDWZFUWZI7F5J5JK","short_pith_number":"pith:TJPFEE52","canonical_record":{"source":{"id":"0907.0231","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-01T20:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"51b9e29437258b9aa1a3f7d311de1f477810b7549d855dc4b07dccbaa0006fd0","abstract_canon_sha256":"361a6ca54f2e2fb75f3f0119c4a76cfac50ef9624d471a6b0f664c7d95a6bc9c"},"schema_version":"1.0"},"canonical_sha256":"9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0","source":{"kind":"arxiv","id":"0907.0231","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.0231","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0907.0231v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.0231","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"TJPFEE52GJMD","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TJPFEE52GJMDWZFU","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TJPFEE52","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:TJPFEE52GJMDWZFUWZI7F5J5JK","target":"record","payload":{"canonical_record":{"source":{"id":"0907.0231","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-01T20:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"51b9e29437258b9aa1a3f7d311de1f477810b7549d855dc4b07dccbaa0006fd0","abstract_canon_sha256":"361a6ca54f2e2fb75f3f0119c4a76cfac50ef9624d471a6b0f664c7d95a6bc9c"},"schema_version":"1.0"},"canonical_sha256":"9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:42.550110Z","signature_b64":"OWbPGoeBFuIOTaJLsvKfVM9Urgzvv8aIRE3S76H+qkHW6lPpCD1pEpQz99KdaGpDmL7SSmsvBugMD86wa8umAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0","last_reissued_at":"2026-05-18T04:29:42.549624Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:42.549624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.0231","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hW+VtBej2cxbqAk3ZRHh5Mtwlbgg/P1wyYSN3mMSrFyCHDOVCeeOMyTMcfYHKlDbKWxhGBJZsZwUpsGzZH4hBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:07:34.446221Z"},"content_sha256":"b7ad1ec76e77e571d0f4739db074d738436cf1cfa70461bf5f1601f218488c01","schema_version":"1.0","event_id":"sha256:b7ad1ec76e77e571d0f4739db074d738436cf1cfa70461bf5f1601f218488c01"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:TJPFEE52GJMDWZFUWZI7F5J5JK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxies probing galaxies: cool halo gas from a z = 0.47 post-starburst galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) Steward Observatory), Andrew C. Phillips (1), Benjamin J. Weiner (2) ((1) UCO/Lick Observatory, David C. Koo (1), J. Xavier Prochaska (1), Kate H. R. Rubin (1)","submitted_at":"2009-07-01T20:00:12Z","abstract_excerpt":"We study the cool gas around a galaxy at z = 0.4729 using Keck/LRIS spectroscopy of a bright (B = 21.7) background galaxy at z = 0.6942 at a transverse distance of 16.5/h_70 kpc. The background galaxy spectrum reveals strong FeII, MgII, MgI, and CaII absorption at the redshift of the foreground galaxy, with a MgII 2796 rest equivalent width of 3.93 +/- 0.08 Angstroms, indicative of a velocity width exceeding 400 km/s. Because the background galaxy is large (> 4/h_70 kpc), the high covering fraction of the absorbing gas suggests that it arises in a spatially extended complex of cool clouds with"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.0231","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bQKmXSFPfSc+1BXfm926DNX+YtfRaD5tbv2Uk+gTZ6uL7tCbOHoRoVTpF1zXaOZ7E0AGmwHsmlYxqQVsDh7AAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:07:34.446811Z"},"content_sha256":"732f58eee9172f39f31ef7814ac6e2cd0b6a4ab1c78781e377c4b2f8480fd040","schema_version":"1.0","event_id":"sha256:732f58eee9172f39f31ef7814ac6e2cd0b6a4ab1c78781e377c4b2f8480fd040"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/bundle.json","state_url":"https://pith.science/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/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":"2026-05-30T12:07:34Z","links":{"resolver":"https://pith.science/pith/TJPFEE52GJMDWZFUWZI7F5J5JK","bundle":"https://pith.science/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/bundle.json","state":"https://pith.science/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TJPFEE52GJMDWZFUWZI7F5J5JK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:TJPFEE52GJMDWZFUWZI7F5J5JK","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":"361a6ca54f2e2fb75f3f0119c4a76cfac50ef9624d471a6b0f664c7d95a6bc9c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-01T20:00:12Z","title_canon_sha256":"51b9e29437258b9aa1a3f7d311de1f477810b7549d855dc4b07dccbaa0006fd0"},"schema_version":"1.0","source":{"id":"0907.0231","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.0231","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0907.0231v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.0231","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"TJPFEE52GJMD","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TJPFEE52GJMDWZFU","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TJPFEE52","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:732f58eee9172f39f31ef7814ac6e2cd0b6a4ab1c78781e377c4b2f8480fd040","target":"graph","created_at":"2026-05-18T04:29:42Z","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 study the cool gas around a galaxy at z = 0.4729 using Keck/LRIS spectroscopy of a bright (B = 21.7) background galaxy at z = 0.6942 at a transverse distance of 16.5/h_70 kpc. The background galaxy spectrum reveals strong FeII, MgII, MgI, and CaII absorption at the redshift of the foreground galaxy, with a MgII 2796 rest equivalent width of 3.93 +/- 0.08 Angstroms, indicative of a velocity width exceeding 400 km/s. Because the background galaxy is large (> 4/h_70 kpc), the high covering fraction of the absorbing gas suggests that it arises in a spatially extended complex of cool clouds with","authors_text":"(2) Steward Observatory), Andrew C. Phillips (1), Benjamin J. Weiner (2) ((1) UCO/Lick Observatory, David C. Koo (1), J. Xavier Prochaska (1), Kate H. R. Rubin (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-01T20:00:12Z","title":"Galaxies probing galaxies: cool halo gas from a z = 0.47 post-starburst galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.0231","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:b7ad1ec76e77e571d0f4739db074d738436cf1cfa70461bf5f1601f218488c01","target":"record","created_at":"2026-05-18T04:29:42Z","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":"361a6ca54f2e2fb75f3f0119c4a76cfac50ef9624d471a6b0f664c7d95a6bc9c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-01T20:00:12Z","title_canon_sha256":"51b9e29437258b9aa1a3f7d311de1f477810b7549d855dc4b07dccbaa0006fd0"},"schema_version":"1.0","source":{"id":"0907.0231","kind":"arxiv","version":1}},"canonical_sha256":"9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a5e5213ba32583b64b4b651f2f53d4a957f28dbac1bca4507fe320264ee69d0","first_computed_at":"2026-05-18T04:29:42.549624Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:42.549624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OWbPGoeBFuIOTaJLsvKfVM9Urgzvv8aIRE3S76H+qkHW6lPpCD1pEpQz99KdaGpDmL7SSmsvBugMD86wa8umAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:42.550110Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.0231","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7ad1ec76e77e571d0f4739db074d738436cf1cfa70461bf5f1601f218488c01","sha256:732f58eee9172f39f31ef7814ac6e2cd0b6a4ab1c78781e377c4b2f8480fd040"],"state_sha256":"aa30e052fd21d6619646f67a169c72c72be79441892213b16d0224d3e6e32232"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7/k6G2GJdiYZVc7J89gNA8HYXfeBWyggx8xx/NNeA0ol4cSoIas36PxdHhLkgX6T6EuUrH5KSgf/eXmB9SYSDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T12:07:34.449339Z","bundle_sha256":"1f97929b1dd058c20a4968bf53518b8ee66f21ce61042fb57d047d173d93e728"}}