{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7J7UGFJNVVV2JPTC4DBNFNSQFP","short_pith_number":"pith:7J7UGFJN","canonical_record":{"source":{"id":"1612.00848","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-02T21:00:01Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"ef777eb3b95092e9b697359f12add4a2996abd8a52a7def9a90a6bb81cc28361","abstract_canon_sha256":"ea218552ca7f414cd0a4561e56f2384ab22c92e0e8d318e4a09e8e88389bebe7"},"schema_version":"1.0"},"canonical_sha256":"fa7f43152dad6ba4be62e0c2d2b6502be88a49293dde69040e54d773db625771","source":{"kind":"arxiv","id":"1612.00848","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.00848","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"arxiv_version","alias_value":"1612.00848v1","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.00848","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"pith_short_12","alias_value":"7J7UGFJNVVV2","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7J7UGFJNVVV2JPTC","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7J7UGFJN","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7J7UGFJNVVV2JPTC4DBNFNSQFP","target":"record","payload":{"canonical_record":{"source":{"id":"1612.00848","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-02T21:00:01Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"ef777eb3b95092e9b697359f12add4a2996abd8a52a7def9a90a6bb81cc28361","abstract_canon_sha256":"ea218552ca7f414cd0a4561e56f2384ab22c92e0e8d318e4a09e8e88389bebe7"},"schema_version":"1.0"},"canonical_sha256":"fa7f43152dad6ba4be62e0c2d2b6502be88a49293dde69040e54d773db625771","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:11.073501Z","signature_b64":"S9uGJKIuDlHcoIdMO2Cj+JF2RdQBB1Kmp5NdtMSCanRQm21eYCeLh0bf++HHpTIrNgfoFWvoXXLauu9Fd/UdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa7f43152dad6ba4be62e0c2d2b6502be88a49293dde69040e54d773db625771","last_reissued_at":"2026-05-18T00:49:11.072828Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:11.072828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.00848","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":"2026-05-18T00:49:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0D8RyMozNu+ZLj81pfxmHtdBPdsasA83ip6g6ogud0gQaTTO3jRf/s/Pci6MgqVyrS2PkyZq5lfs7taP7RHNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:05:09.323820Z"},"content_sha256":"b0fac17a78419f4606229f61489ed89aa1c9e01810b33154e485cf36cb119cb1","schema_version":"1.0","event_id":"sha256:b0fac17a78419f4606229f61489ed89aa1c9e01810b33154e485cf36cb119cb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7J7UGFJNVVV2JPTC4DBNFNSQFP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First Detection of Hydrogen in the \\beta\\ Pictoris Gas Disk","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Lecavelier des Etangs, A.-M. Lagrange, A. Vidal-Madjar, F. Kiefer, G. H\\'ebrard, H. Beust, P. A. Wilson, R. Ferlet, V. Bourrier","submitted_at":"2016-12-02T21:00:01Z","abstract_excerpt":"The young and nearby star \\beta\\ Pictoris (\\beta\\ Pic) is surrounded by a debris disk composed of dust and gas known to host a myriad evaporating exocomets, planetesimals and at least one planet. At an edge-on inclination, as seen from Earth, this system is ideal for debris disk studies providing an excellent opportunity to use absorption spectroscopy to study the planet forming environment. Using the Cosmic Origins Spectrograph (COS) instrument on the Hubble Space Telescope (HST) we observe the most abundant element in the disk, hydrogen, through the HI Lyman \\alpha\\ (Ly-\\alpha\\) line. We pre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.00848","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":"2026-05-18T00:49:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D/0VKzajfPxsrJAjb1wqIp54WTQXhwTDNCn/OMOpJTQlQ+zBBhacRPBSu5lg1HKdIB1+at9Cykr2Us7gDi4uBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:05:09.324505Z"},"content_sha256":"c42b47596e76c3898bdc6f9537cb01fc7b828861ab7824fd8dbf06932a4cacec","schema_version":"1.0","event_id":"sha256:c42b47596e76c3898bdc6f9537cb01fc7b828861ab7824fd8dbf06932a4cacec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/bundle.json","state_url":"https://pith.science/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/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":"2026-05-30T05:05:09Z","links":{"resolver":"https://pith.science/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP","bundle":"https://pith.science/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/bundle.json","state":"https://pith.science/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7J7UGFJNVVV2JPTC4DBNFNSQFP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7J7UGFJNVVV2JPTC4DBNFNSQFP","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":"ea218552ca7f414cd0a4561e56f2384ab22c92e0e8d318e4a09e8e88389bebe7","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-02T21:00:01Z","title_canon_sha256":"ef777eb3b95092e9b697359f12add4a2996abd8a52a7def9a90a6bb81cc28361"},"schema_version":"1.0","source":{"id":"1612.00848","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.00848","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"arxiv_version","alias_value":"1612.00848v1","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.00848","created_at":"2026-05-18T00:49:11Z"},{"alias_kind":"pith_short_12","alias_value":"7J7UGFJNVVV2","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7J7UGFJNVVV2JPTC","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7J7UGFJN","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:c42b47596e76c3898bdc6f9537cb01fc7b828861ab7824fd8dbf06932a4cacec","target":"graph","created_at":"2026-05-18T00:49:11Z","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 young and nearby star \\beta\\ Pictoris (\\beta\\ Pic) is surrounded by a debris disk composed of dust and gas known to host a myriad evaporating exocomets, planetesimals and at least one planet. At an edge-on inclination, as seen from Earth, this system is ideal for debris disk studies providing an excellent opportunity to use absorption spectroscopy to study the planet forming environment. Using the Cosmic Origins Spectrograph (COS) instrument on the Hubble Space Telescope (HST) we observe the most abundant element in the disk, hydrogen, through the HI Lyman \\alpha\\ (Ly-\\alpha\\) line. We pre","authors_text":"A. Lecavelier des Etangs, A.-M. Lagrange, A. Vidal-Madjar, F. Kiefer, G. H\\'ebrard, H. Beust, P. A. Wilson, R. Ferlet, V. Bourrier","cross_cats":["astro-ph.EP","astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-02T21:00:01Z","title":"First Detection of Hydrogen in the \\beta\\ Pictoris Gas Disk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.00848","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:b0fac17a78419f4606229f61489ed89aa1c9e01810b33154e485cf36cb119cb1","target":"record","created_at":"2026-05-18T00:49:11Z","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":"ea218552ca7f414cd0a4561e56f2384ab22c92e0e8d318e4a09e8e88389bebe7","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-12-02T21:00:01Z","title_canon_sha256":"ef777eb3b95092e9b697359f12add4a2996abd8a52a7def9a90a6bb81cc28361"},"schema_version":"1.0","source":{"id":"1612.00848","kind":"arxiv","version":1}},"canonical_sha256":"fa7f43152dad6ba4be62e0c2d2b6502be88a49293dde69040e54d773db625771","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa7f43152dad6ba4be62e0c2d2b6502be88a49293dde69040e54d773db625771","first_computed_at":"2026-05-18T00:49:11.072828Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:11.072828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S9uGJKIuDlHcoIdMO2Cj+JF2RdQBB1Kmp5NdtMSCanRQm21eYCeLh0bf++HHpTIrNgfoFWvoXXLauu9Fd/UdBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:11.073501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.00848","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0fac17a78419f4606229f61489ed89aa1c9e01810b33154e485cf36cb119cb1","sha256:c42b47596e76c3898bdc6f9537cb01fc7b828861ab7824fd8dbf06932a4cacec"],"state_sha256":"6bd72296212c3eeab111b00b1e17ee87cff10d9db2a527a57260b429ff59c85c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eP24RSwIc/Z3GRb2byPPC/A+UM+nbSQK0EvG79Speb7Lm0NjN1zD04vnR56Soe21TZR1f2GuMHUYiCKWX9OLCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T05:05:09.327899Z","bundle_sha256":"e1d9d5857c8c290777bb769141481d9fb254925874816ec445a212e01861b02b"}}