{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EK44DJMTOVZ73MH463IDSO4JWW","short_pith_number":"pith:EK44DJMT","canonical_record":{"source":{"id":"1305.6163","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-27T10:02:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"b19fb9575e5a26325a5086f0f3c4996a4b98262cfefc2b3ce54ebde5e6837096","abstract_canon_sha256":"4fe78acca3af3ae246e20743f99879dbb095be64a5d3d43963b4d5c9199c75bf"},"schema_version":"1.0"},"canonical_sha256":"22b9c1a5937573fdb0fcf6d0393b89b5b289dd66c4f12cac560382d9f7acb66d","source":{"kind":"arxiv","id":"1305.6163","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.6163","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"arxiv_version","alias_value":"1305.6163v1","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.6163","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"pith_short_12","alias_value":"EK44DJMTOVZ7","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EK44DJMTOVZ73MH4","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EK44DJMT","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EK44DJMTOVZ73MH463IDSO4JWW","target":"record","payload":{"canonical_record":{"source":{"id":"1305.6163","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-27T10:02:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"b19fb9575e5a26325a5086f0f3c4996a4b98262cfefc2b3ce54ebde5e6837096","abstract_canon_sha256":"4fe78acca3af3ae246e20743f99879dbb095be64a5d3d43963b4d5c9199c75bf"},"schema_version":"1.0"},"canonical_sha256":"22b9c1a5937573fdb0fcf6d0393b89b5b289dd66c4f12cac560382d9f7acb66d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:41.229337Z","signature_b64":"fIBzBsXD9Z5Q0Z5IyHdEKpAOWsaWgEIAXEjsvGvVBoXx53PGXtsYKo4tVjYKMNbeWwRaBbW3DwdTBfXfv6zIAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22b9c1a5937573fdb0fcf6d0393b89b5b289dd66c4f12cac560382d9f7acb66d","last_reissued_at":"2026-05-18T01:49:41.228780Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:41.228780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.6163","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":"2026-05-18T01:49:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kNzcJqH54GHKHDob3bOG03nttp5RNTMpTZaIbvJle833tFJEhr9XNs97xO2e+seRBjZve9J4zGG8uzKBYHX1Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:12:13.379976Z"},"content_sha256":"3142944827ade86a57d146215ea3b4b0234c3d77ea0eda0c7488d2653e668aea","schema_version":"1.0","event_id":"sha256:3142944827ade86a57d146215ea3b4b0234c3d77ea0eda0c7488d2653e668aea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EK44DJMTOVZ73MH463IDSO4JWW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First results from a study of DIBs with thousands of high-quality massive-star spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. Pellerin, A. Sota, E. J. Alfaro, J. Ma\\'iz Apell\\'aniz, N. I. Morrell, R. H. Barb\\'a, S. Sim\\'on-D\\'iaz","submitted_at":"2013-05-27T10:02:49Z","abstract_excerpt":"We are using five different surveys to compile the largest sample of diffuse interstellar band (DIB) measurements ever collected. GOSSS is obtaining intermediate-resolution blue-violet spectroscopy of ~2500 OB stars, of which 60% have already been observed and processed. The other four surveys have already collected multi-epoch high-resolution optical spectroscopy of 700 OB stars with different telescopes, including the 9 m Hobby-Eberly Telescope in McDonald Observatory. Some of our stars are highly-extinguished targets for which no good-quality optical spectra have ever been published. For al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.6163","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":"2026-05-18T01:49:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"axbYbaWRE7pVxrwyn2BuFEFe5JasHf7ioZW8ZBu2q+zdhoiMVeRHrG0X+PrDdP5wnUMIJEXVGKgaNx2Hew11DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:12:13.380337Z"},"content_sha256":"bd46cafe711ddf521a4c14af5422d5591334a582e9dffb94996a719a1cf3edad","schema_version":"1.0","event_id":"sha256:bd46cafe711ddf521a4c14af5422d5591334a582e9dffb94996a719a1cf3edad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EK44DJMTOVZ73MH463IDSO4JWW/bundle.json","state_url":"https://pith.science/pith/EK44DJMTOVZ73MH463IDSO4JWW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EK44DJMTOVZ73MH463IDSO4JWW/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":"2026-06-05T12:12:13Z","links":{"resolver":"https://pith.science/pith/EK44DJMTOVZ73MH463IDSO4JWW","bundle":"https://pith.science/pith/EK44DJMTOVZ73MH463IDSO4JWW/bundle.json","state":"https://pith.science/pith/EK44DJMTOVZ73MH463IDSO4JWW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EK44DJMTOVZ73MH463IDSO4JWW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EK44DJMTOVZ73MH463IDSO4JWW","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":"4fe78acca3af3ae246e20743f99879dbb095be64a5d3d43963b4d5c9199c75bf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-27T10:02:49Z","title_canon_sha256":"b19fb9575e5a26325a5086f0f3c4996a4b98262cfefc2b3ce54ebde5e6837096"},"schema_version":"1.0","source":{"id":"1305.6163","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.6163","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"arxiv_version","alias_value":"1305.6163v1","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.6163","created_at":"2026-05-18T01:49:41Z"},{"alias_kind":"pith_short_12","alias_value":"EK44DJMTOVZ7","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EK44DJMTOVZ73MH4","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EK44DJMT","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:bd46cafe711ddf521a4c14af5422d5591334a582e9dffb94996a719a1cf3edad","target":"graph","created_at":"2026-05-18T01:49:41Z","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 are using five different surveys to compile the largest sample of diffuse interstellar band (DIB) measurements ever collected. GOSSS is obtaining intermediate-resolution blue-violet spectroscopy of ~2500 OB stars, of which 60% have already been observed and processed. The other four surveys have already collected multi-epoch high-resolution optical spectroscopy of 700 OB stars with different telescopes, including the 9 m Hobby-Eberly Telescope in McDonald Observatory. Some of our stars are highly-extinguished targets for which no good-quality optical spectra have ever been published. For al","authors_text":"A. Pellerin, A. Sota, E. J. Alfaro, J. Ma\\'iz Apell\\'aniz, N. I. Morrell, R. H. Barb\\'a, S. Sim\\'on-D\\'iaz","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-27T10:02:49Z","title":"First results from a study of DIBs with thousands of high-quality massive-star spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.6163","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":"sha256:3142944827ade86a57d146215ea3b4b0234c3d77ea0eda0c7488d2653e668aea","target":"record","created_at":"2026-05-18T01:49:41Z","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":"4fe78acca3af3ae246e20743f99879dbb095be64a5d3d43963b4d5c9199c75bf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-05-27T10:02:49Z","title_canon_sha256":"b19fb9575e5a26325a5086f0f3c4996a4b98262cfefc2b3ce54ebde5e6837096"},"schema_version":"1.0","source":{"id":"1305.6163","kind":"arxiv","version":1}},"canonical_sha256":"22b9c1a5937573fdb0fcf6d0393b89b5b289dd66c4f12cac560382d9f7acb66d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22b9c1a5937573fdb0fcf6d0393b89b5b289dd66c4f12cac560382d9f7acb66d","first_computed_at":"2026-05-18T01:49:41.228780Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:41.228780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fIBzBsXD9Z5Q0Z5IyHdEKpAOWsaWgEIAXEjsvGvVBoXx53PGXtsYKo4tVjYKMNbeWwRaBbW3DwdTBfXfv6zIAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:41.229337Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.6163","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3142944827ade86a57d146215ea3b4b0234c3d77ea0eda0c7488d2653e668aea","sha256:bd46cafe711ddf521a4c14af5422d5591334a582e9dffb94996a719a1cf3edad"],"state_sha256":"242293bf72902f3ea4fa0293bd4a2eb8f5a2b287db79f032af5cc835fa4e1097"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q5rmcg3hG9SampTp2VgBX9DCphT1HdePUigXp+ae+mcGYX5xgXR4VudzoJ7I6iyDwEjzBO78+X5ocEQwQj4aDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:12:13.382256Z","bundle_sha256":"631813ed9bb063c7ef12c33f1a0c245bf0be9d6f5379fe59544b07eedd751292"}}