{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2V7O7QPTWXZJ5FVQLWYBOIU3ZG","short_pith_number":"pith:2V7O7QPT","canonical_record":{"source":{"id":"1308.4380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-20T19:08:05Z","cross_cats_sorted":[],"title_canon_sha256":"cb74404efaf4c7fe5c9f54a46c937b542b58825ff81e46e80d2c85a5ec3e48e4","abstract_canon_sha256":"c599fa9fe2c6005c37419f21032ca32160ded21ba82de1f75a77b7b7c1dd64d5"},"schema_version":"1.0"},"canonical_sha256":"d57eefc1f3b5f29e96b05db017229bc9900707b7d3db3d6545a7c23f8449ced6","source":{"kind":"arxiv","id":"1308.4380","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4380","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4380v1","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4380","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"pith_short_12","alias_value":"2V7O7QPTWXZJ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2V7O7QPTWXZJ5FVQ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2V7O7QPT","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2V7O7QPTWXZJ5FVQLWYBOIU3ZG","target":"record","payload":{"canonical_record":{"source":{"id":"1308.4380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-20T19:08:05Z","cross_cats_sorted":[],"title_canon_sha256":"cb74404efaf4c7fe5c9f54a46c937b542b58825ff81e46e80d2c85a5ec3e48e4","abstract_canon_sha256":"c599fa9fe2c6005c37419f21032ca32160ded21ba82de1f75a77b7b7c1dd64d5"},"schema_version":"1.0"},"canonical_sha256":"d57eefc1f3b5f29e96b05db017229bc9900707b7d3db3d6545a7c23f8449ced6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:15:32.987135Z","signature_b64":"KhHsJq8wUwARAJln2IJZcZClagc1pnGyuGOr9MuNtdj571ncjBczG+3T1mEx6+y0gLvbTwBDUNVulLm17O4eBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d57eefc1f3b5f29e96b05db017229bc9900707b7d3db3d6545a7c23f8449ced6","last_reissued_at":"2026-05-18T03:15:32.986440Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:15:32.986440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.4380","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":"2026-05-18T03:15:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ctaH68JjQISLyKSt8d67ggI7Nm1bCAohnq9uK7JbgqpVRaE10D9rbeG4br7H237ptIt83LDCzpJCP76VzhyIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:49:41.780524Z"},"content_sha256":"3c04745d0ade1611421b89278541218cf68f51d95c43b1a7dd5960daf191921f","schema_version":"1.0","event_id":"sha256:3c04745d0ade1611421b89278541218cf68f51d95c43b1a7dd5960daf191921f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2V7O7QPTWXZJ5FVQLWYBOIU3ZG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The CN/C15 N isotopic ratio towards dark clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexandre Faure (IPAG), G. Pineau Des For\\^ets (LERMA, IAS), Marco Padovani (LERMA), Pierre Hily-Blant (IPAG), Romane Le Gal (IPAG)","submitted_at":"2013-08-20T19:08:05Z","abstract_excerpt":"Understanding the origin of the composition of solar system cosmomaterials is a central question, not only in the cosmochemistry and astrochemistry fields, and requires various approaches to be combined. Measurements of isotopic ratios in cometary materials provide strong constraints on the content of the protosolar nebula. Their relation with the composition of the parental dark clouds is, however, still very elusive. In this paper, we bring new constraints based on the isotopic composition of nitrogen in dark clouds, with the aim of understanding the chemical processes that are responsible f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4380","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":"2026-05-18T03:15:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mm2RVpxjvbR0fS5uK4D7ECi0KP+SAX9FeSUUvt1CzdwcuFiEpXRi0TczmUEaxPnBdHfSovBCcWMDGL8i9ExwBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:49:41.780890Z"},"content_sha256":"9a9f70f4441aa507fc0ab290e921d40bf02ddfcb95886a27f1b0a03a896496ae","schema_version":"1.0","event_id":"sha256:9a9f70f4441aa507fc0ab290e921d40bf02ddfcb95886a27f1b0a03a896496ae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/bundle.json","state_url":"https://pith.science/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/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":"2026-06-01T14:49:41Z","links":{"resolver":"https://pith.science/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG","bundle":"https://pith.science/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/bundle.json","state":"https://pith.science/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2V7O7QPTWXZJ5FVQLWYBOIU3ZG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2V7O7QPTWXZJ5FVQLWYBOIU3ZG","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":"c599fa9fe2c6005c37419f21032ca32160ded21ba82de1f75a77b7b7c1dd64d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-20T19:08:05Z","title_canon_sha256":"cb74404efaf4c7fe5c9f54a46c937b542b58825ff81e46e80d2c85a5ec3e48e4"},"schema_version":"1.0","source":{"id":"1308.4380","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.4380","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"arxiv_version","alias_value":"1308.4380v1","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.4380","created_at":"2026-05-18T03:15:32Z"},{"alias_kind":"pith_short_12","alias_value":"2V7O7QPTWXZJ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"2V7O7QPTWXZJ5FVQ","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"2V7O7QPT","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:9a9f70f4441aa507fc0ab290e921d40bf02ddfcb95886a27f1b0a03a896496ae","target":"graph","created_at":"2026-05-18T03:15:32Z","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":"Understanding the origin of the composition of solar system cosmomaterials is a central question, not only in the cosmochemistry and astrochemistry fields, and requires various approaches to be combined. Measurements of isotopic ratios in cometary materials provide strong constraints on the content of the protosolar nebula. Their relation with the composition of the parental dark clouds is, however, still very elusive. In this paper, we bring new constraints based on the isotopic composition of nitrogen in dark clouds, with the aim of understanding the chemical processes that are responsible f","authors_text":"Alexandre Faure (IPAG), G. Pineau Des For\\^ets (LERMA, IAS), Marco Padovani (LERMA), Pierre Hily-Blant (IPAG), Romane Le Gal (IPAG)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-20T19:08:05Z","title":"The CN/C15 N isotopic ratio towards dark clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.4380","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":"sha256:3c04745d0ade1611421b89278541218cf68f51d95c43b1a7dd5960daf191921f","target":"record","created_at":"2026-05-18T03:15:32Z","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":"c599fa9fe2c6005c37419f21032ca32160ded21ba82de1f75a77b7b7c1dd64d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-20T19:08:05Z","title_canon_sha256":"cb74404efaf4c7fe5c9f54a46c937b542b58825ff81e46e80d2c85a5ec3e48e4"},"schema_version":"1.0","source":{"id":"1308.4380","kind":"arxiv","version":1}},"canonical_sha256":"d57eefc1f3b5f29e96b05db017229bc9900707b7d3db3d6545a7c23f8449ced6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d57eefc1f3b5f29e96b05db017229bc9900707b7d3db3d6545a7c23f8449ced6","first_computed_at":"2026-05-18T03:15:32.986440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:15:32.986440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KhHsJq8wUwARAJln2IJZcZClagc1pnGyuGOr9MuNtdj571ncjBczG+3T1mEx6+y0gLvbTwBDUNVulLm17O4eBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:15:32.987135Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.4380","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c04745d0ade1611421b89278541218cf68f51d95c43b1a7dd5960daf191921f","sha256:9a9f70f4441aa507fc0ab290e921d40bf02ddfcb95886a27f1b0a03a896496ae"],"state_sha256":"6bfc20e68c44350c201949d726e740bee5c0abedd3f8eb988ab96aedb95eb209"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X3E/ebd6VVZz1sAWDkXHiuq0LLVEL1oiMpRBcu5d1sGNHNDtRNDvAe5bj2Mc/JKDFSnqMcdfYnENj/aBESxkDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T14:49:41.782866Z","bundle_sha256":"6b53bb86a9d9a11404f82167c52d933f643bf64cb2fa1327dd5605757d10eda1"}}