{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QFY2W3ZFG4BPUAFGQB5YX2M3DK","short_pith_number":"pith:QFY2W3ZF","canonical_record":{"source":{"id":"1811.08431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"07745395e349df04d6d38b4d6e3cee3869b3f96e95e7ee76a9e60a3cafe89541","abstract_canon_sha256":"7b89bb66af499ce9fe70397d625a465fb2629279a58075a897bfbf0682df732e"},"schema_version":"1.0"},"canonical_sha256":"8171ab6f253702fa00a6807b8be99b1a8c74902aefc44f6507646cec21d29ae7","source":{"kind":"arxiv","id":"1811.08431","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.08431","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"arxiv_version","alias_value":"1811.08431v1","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.08431","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"pith_short_12","alias_value":"QFY2W3ZFG4BP","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QFY2W3ZFG4BPUAFG","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QFY2W3ZF","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QFY2W3ZFG4BPUAFGQB5YX2M3DK","target":"record","payload":{"canonical_record":{"source":{"id":"1811.08431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"07745395e349df04d6d38b4d6e3cee3869b3f96e95e7ee76a9e60a3cafe89541","abstract_canon_sha256":"7b89bb66af499ce9fe70397d625a465fb2629279a58075a897bfbf0682df732e"},"schema_version":"1.0"},"canonical_sha256":"8171ab6f253702fa00a6807b8be99b1a8c74902aefc44f6507646cec21d29ae7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:43.713582Z","signature_b64":"r4BGSQ+t5EJFNldsrw97Cc15aCkGNC2mWTWN051GefEGsyT7DKYh87Mhf3lpxrpvidzrFBmZZn+aZUdFmkqvAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8171ab6f253702fa00a6807b8be99b1a8c74902aefc44f6507646cec21d29ae7","last_reissued_at":"2026-05-17T23:55:43.712933Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:43.712933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.08431","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":"2026-05-17T23:55:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cpu2zPWYADuweIJ9L8TNPV/R5FOZPxT8Jl7aP39s/g+0Qj2UFy/lM9ZqF/EvrfIaLs8/o1tU3vjgM9wY5Y0kBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:29:31.271598Z"},"content_sha256":"0fd858f29e39eea00c5254a01ee80821736e7dcd3ec96d7e8167f9d96b99985f","schema_version":"1.0","event_id":"sha256:0fd858f29e39eea00c5254a01ee80821736e7dcd3ec96d7e8167f9d96b99985f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QFY2W3ZFG4BPUAFGQB5YX2M3DK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatially resolved mass-to-light from the CALIFA survey. Mass-to-light ratio vs. color relations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. L. de Amorim, E. P\\'erez, R. Cid Fernandes, R. Garc\\'ia-Benito, R. M. Gonz\\'alez Delgado, S. F. S\\'anchez","submitted_at":"2018-11-20T19:00:00Z","abstract_excerpt":"We investigated the mass-to-light versus color relations (MLCRs) derived from the spatially resolved star formation history of a sample of 452 galaxies observed with integral field spectroscopy in the CALIFA survey. We derived the stellar mass ($M_\\star$) and the stellar mass surface density from the combination of full spectral fitting (using different sets of stellar population models) with observed and synthetic colors in optical broad bands. This method allows obtaining the radial structure of the mass-to-light ratio ($M/L$) at several wavelengths and studying the spatially resolved MLCRs."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.08431","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":"2026-05-17T23:55:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hKDy3lBxRIiI0mwPst3uXpqQ1E0+H0O1G1b9mPzeYUTF+phB4abtE/Xy1booIsTU6PU3GNZFA9W+0W04cbxNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:29:31.271954Z"},"content_sha256":"338e980c84f107e9ed81e9d88ecbc5cf0ebd68881cb2072af7cee0a35f45ae04","schema_version":"1.0","event_id":"sha256:338e980c84f107e9ed81e9d88ecbc5cf0ebd68881cb2072af7cee0a35f45ae04"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/bundle.json","state_url":"https://pith.science/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/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":"2026-05-31T00:29:31Z","links":{"resolver":"https://pith.science/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK","bundle":"https://pith.science/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/bundle.json","state":"https://pith.science/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QFY2W3ZFG4BPUAFGQB5YX2M3DK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QFY2W3ZFG4BPUAFGQB5YX2M3DK","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":"7b89bb66af499ce9fe70397d625a465fb2629279a58075a897bfbf0682df732e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:00:00Z","title_canon_sha256":"07745395e349df04d6d38b4d6e3cee3869b3f96e95e7ee76a9e60a3cafe89541"},"schema_version":"1.0","source":{"id":"1811.08431","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.08431","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"arxiv_version","alias_value":"1811.08431v1","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.08431","created_at":"2026-05-17T23:55:43Z"},{"alias_kind":"pith_short_12","alias_value":"QFY2W3ZFG4BP","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QFY2W3ZFG4BPUAFG","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QFY2W3ZF","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:338e980c84f107e9ed81e9d88ecbc5cf0ebd68881cb2072af7cee0a35f45ae04","target":"graph","created_at":"2026-05-17T23:55:43Z","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 investigated the mass-to-light versus color relations (MLCRs) derived from the spatially resolved star formation history of a sample of 452 galaxies observed with integral field spectroscopy in the CALIFA survey. We derived the stellar mass ($M_\\star$) and the stellar mass surface density from the combination of full spectral fitting (using different sets of stellar population models) with observed and synthetic colors in optical broad bands. This method allows obtaining the radial structure of the mass-to-light ratio ($M/L$) at several wavelengths and studying the spatially resolved MLCRs.","authors_text":"A. L. de Amorim, E. P\\'erez, R. Cid Fernandes, R. Garc\\'ia-Benito, R. M. Gonz\\'alez Delgado, S. F. S\\'anchez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:00:00Z","title":"Spatially resolved mass-to-light from the CALIFA survey. Mass-to-light ratio vs. color relations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.08431","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":"sha256:0fd858f29e39eea00c5254a01ee80821736e7dcd3ec96d7e8167f9d96b99985f","target":"record","created_at":"2026-05-17T23:55:43Z","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":"7b89bb66af499ce9fe70397d625a465fb2629279a58075a897bfbf0682df732e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-20T19:00:00Z","title_canon_sha256":"07745395e349df04d6d38b4d6e3cee3869b3f96e95e7ee76a9e60a3cafe89541"},"schema_version":"1.0","source":{"id":"1811.08431","kind":"arxiv","version":1}},"canonical_sha256":"8171ab6f253702fa00a6807b8be99b1a8c74902aefc44f6507646cec21d29ae7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8171ab6f253702fa00a6807b8be99b1a8c74902aefc44f6507646cec21d29ae7","first_computed_at":"2026-05-17T23:55:43.712933Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:43.712933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r4BGSQ+t5EJFNldsrw97Cc15aCkGNC2mWTWN051GefEGsyT7DKYh87Mhf3lpxrpvidzrFBmZZn+aZUdFmkqvAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:43.713582Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.08431","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0fd858f29e39eea00c5254a01ee80821736e7dcd3ec96d7e8167f9d96b99985f","sha256:338e980c84f107e9ed81e9d88ecbc5cf0ebd68881cb2072af7cee0a35f45ae04"],"state_sha256":"018184473421c42b0d29acde3f7af8020d79420b36fba496b2aad1cdd654d950"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IgBMoOHDlyJBAJTLBWVdf6XWdskJEsXEpaO78wjZoEsA8EzrrhwacQIP0tCm+s7rFcQIPKbCSFbuE96mw+K2BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:29:31.273986Z","bundle_sha256":"452159a60086f76fea2a247337600d277e24e3ae03f4fd5b7ac960bb62f24f42"}}