{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:FOFNLHTR4Y4WFCP5F2VBPYSDJY","short_pith_number":"pith:FOFNLHTR","canonical_record":{"source":{"id":"1502.05395","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-18T15:41:46Z","cross_cats_sorted":[],"title_canon_sha256":"3393e3dbacd8188bad8dd4b9e5b7bfddbcb28380d17aed8421af1bf954889644","abstract_canon_sha256":"b75853b28d5f569c0db2b7f34d2089304c103a74aace6f2d1f2b91ca94c5b7d3"},"schema_version":"1.0"},"canonical_sha256":"2b8ad59e71e6396289fd2eaa17e2434e2fcee023ba40360499718f126f81edae","source":{"kind":"arxiv","id":"1502.05395","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.05395","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"arxiv_version","alias_value":"1502.05395v1","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.05395","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"pith_short_12","alias_value":"FOFNLHTR4Y4W","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FOFNLHTR4Y4WFCP5","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FOFNLHTR","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:FOFNLHTR4Y4WFCP5F2VBPYSDJY","target":"record","payload":{"canonical_record":{"source":{"id":"1502.05395","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-18T15:41:46Z","cross_cats_sorted":[],"title_canon_sha256":"3393e3dbacd8188bad8dd4b9e5b7bfddbcb28380d17aed8421af1bf954889644","abstract_canon_sha256":"b75853b28d5f569c0db2b7f34d2089304c103a74aace6f2d1f2b91ca94c5b7d3"},"schema_version":"1.0"},"canonical_sha256":"2b8ad59e71e6396289fd2eaa17e2434e2fcee023ba40360499718f126f81edae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:37.438507Z","signature_b64":"lhONVNh6+vm8nCGhHXV2H3zu8RcuXUKvHNwqHmG7fNrhNIKvOnIi8SVcTNupMxD0qpusry1/lHoBoqrKQ1pNAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b8ad59e71e6396289fd2eaa17e2434e2fcee023ba40360499718f126f81edae","last_reissued_at":"2026-05-18T01:59:37.437722Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:37.437722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.05395","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":"2026-05-18T01:59:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4BzyOowR/7FNxGoGb0P+edlqp67da8JSJRHDoT28RZ3I/yJn372HYDZDgTqt3gaMN33EDgenIDYoA7RR/8JoBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:52:09.707428Z"},"content_sha256":"115e203706e512fffc1e58a44d732be3a66c122965ff43083d5d16431a6d90f2","schema_version":"1.0","event_id":"sha256:115e203706e512fffc1e58a44d732be3a66c122965ff43083d5d16431a6d90f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:FOFNLHTR4Y4WFCP5F2VBPYSDJY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The chemical footprint of the star formation feedback in M 82 on scales of 100 pc","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Fuente, A. Usero, D. Ginard, M. Gerin, M. Krips, P. Pilleri, R. Neri, S. Garc\\'ia-Burillo, S.P. Trevi\\~no-Morales, T. Alonso-Albi","submitted_at":"2015-02-18T15:41:46Z","abstract_excerpt":"We present interferometric observations of the CN 1-0 (113.491 GHz), N2H+ 1-0 (93.173 GHz), H(41)a (92.034 GHz), CH3CN (91.987 GHz), CS 3-2 (146.969 GHz), c-C3H2 3-2 (145.089 GHz), H2CO 2-1 (145.603 GHz) and HC3N 16-15 (145.601 GHz) lines towards M82, carried out with the IRAM Plateau de Bure Interferometer (PdBI). PDR chemical modelling is used to interpret these observations.\n  Our results show that the abundances of N2H+, CS and H13 CO+ remain quite constant across the galaxy confirming that these species are excellent tracers of the dense molecular gas. On the contrary, the abundance of CN"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.05395","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":"2026-05-18T01:59:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gb0A/E7ce3+Q4W11ZaCWvd7vcq1sWDE1H/uvag2cjmMV+bG7GgkepdROPf0iIUhYGjNjuVaQkIb5+4KLBISKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T06:52:09.708089Z"},"content_sha256":"af2de7c34b28d068f56c5f897baeb548f4b1579f546366eab4a067b0ecda3a4c","schema_version":"1.0","event_id":"sha256:af2de7c34b28d068f56c5f897baeb548f4b1579f546366eab4a067b0ecda3a4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/bundle.json","state_url":"https://pith.science/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/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":"2026-05-26T06:52:09Z","links":{"resolver":"https://pith.science/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY","bundle":"https://pith.science/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/bundle.json","state":"https://pith.science/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FOFNLHTR4Y4WFCP5F2VBPYSDJY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FOFNLHTR4Y4WFCP5F2VBPYSDJY","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":"b75853b28d5f569c0db2b7f34d2089304c103a74aace6f2d1f2b91ca94c5b7d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-18T15:41:46Z","title_canon_sha256":"3393e3dbacd8188bad8dd4b9e5b7bfddbcb28380d17aed8421af1bf954889644"},"schema_version":"1.0","source":{"id":"1502.05395","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.05395","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"arxiv_version","alias_value":"1502.05395v1","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.05395","created_at":"2026-05-18T01:59:37Z"},{"alias_kind":"pith_short_12","alias_value":"FOFNLHTR4Y4W","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FOFNLHTR4Y4WFCP5","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FOFNLHTR","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:af2de7c34b28d068f56c5f897baeb548f4b1579f546366eab4a067b0ecda3a4c","target":"graph","created_at":"2026-05-18T01:59:37Z","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 present interferometric observations of the CN 1-0 (113.491 GHz), N2H+ 1-0 (93.173 GHz), H(41)a (92.034 GHz), CH3CN (91.987 GHz), CS 3-2 (146.969 GHz), c-C3H2 3-2 (145.089 GHz), H2CO 2-1 (145.603 GHz) and HC3N 16-15 (145.601 GHz) lines towards M82, carried out with the IRAM Plateau de Bure Interferometer (PdBI). PDR chemical modelling is used to interpret these observations.\n  Our results show that the abundances of N2H+, CS and H13 CO+ remain quite constant across the galaxy confirming that these species are excellent tracers of the dense molecular gas. On the contrary, the abundance of CN","authors_text":"A. Fuente, A. Usero, D. Ginard, M. Gerin, M. Krips, P. Pilleri, R. Neri, S. Garc\\'ia-Burillo, S.P. Trevi\\~no-Morales, T. Alonso-Albi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-18T15:41:46Z","title":"The chemical footprint of the star formation feedback in M 82 on scales of 100 pc"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.05395","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":"sha256:115e203706e512fffc1e58a44d732be3a66c122965ff43083d5d16431a6d90f2","target":"record","created_at":"2026-05-18T01:59:37Z","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":"b75853b28d5f569c0db2b7f34d2089304c103a74aace6f2d1f2b91ca94c5b7d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-18T15:41:46Z","title_canon_sha256":"3393e3dbacd8188bad8dd4b9e5b7bfddbcb28380d17aed8421af1bf954889644"},"schema_version":"1.0","source":{"id":"1502.05395","kind":"arxiv","version":1}},"canonical_sha256":"2b8ad59e71e6396289fd2eaa17e2434e2fcee023ba40360499718f126f81edae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b8ad59e71e6396289fd2eaa17e2434e2fcee023ba40360499718f126f81edae","first_computed_at":"2026-05-18T01:59:37.437722Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:37.437722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lhONVNh6+vm8nCGhHXV2H3zu8RcuXUKvHNwqHmG7fNrhNIKvOnIi8SVcTNupMxD0qpusry1/lHoBoqrKQ1pNAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:37.438507Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.05395","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:115e203706e512fffc1e58a44d732be3a66c122965ff43083d5d16431a6d90f2","sha256:af2de7c34b28d068f56c5f897baeb548f4b1579f546366eab4a067b0ecda3a4c"],"state_sha256":"d558876638da7031ceed796c06d2856f60292f514aee7016d17895cd7d05da8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dkYs3tT3l2GdQ0z4ncBrfzOhDQplecLw1meYYed1bWV1g5bKD+x+CiFFr3wGOpMxkSVm6WD23AtJsyO4PODPDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T06:52:09.711617Z","bundle_sha256":"0c9cff760a1b751135a3977be495894e0ed4b8e33dac4e124ed0d494c403e427"}}