{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:3QFFJ7NPY7ONS2CC3S6QSMXPA6","short_pith_number":"pith:3QFFJ7NP","canonical_record":{"source":{"id":"1012.3752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-16T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"1cebef2236b158f3a99689d483a69ffe3ecb495b78e6aa8c05d564c691d076ba","abstract_canon_sha256":"9bf72516dde55ff51e39d77106fc38f00fd500bb268ce3609583defe318eb23c"},"schema_version":"1.0"},"canonical_sha256":"dc0a54fdafc7dcd96842dcbd0932ef07a7f12ba44cef37e1d2980084f5d5cee9","source":{"kind":"arxiv","id":"1012.3752","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.3752","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"arxiv_version","alias_value":"1012.3752v1","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.3752","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"pith_short_12","alias_value":"3QFFJ7NPY7ON","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"3QFFJ7NPY7ONS2CC","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"3QFFJ7NP","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:3QFFJ7NPY7ONS2CC3S6QSMXPA6","target":"record","payload":{"canonical_record":{"source":{"id":"1012.3752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-16T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"1cebef2236b158f3a99689d483a69ffe3ecb495b78e6aa8c05d564c691d076ba","abstract_canon_sha256":"9bf72516dde55ff51e39d77106fc38f00fd500bb268ce3609583defe318eb23c"},"schema_version":"1.0"},"canonical_sha256":"dc0a54fdafc7dcd96842dcbd0932ef07a7f12ba44cef37e1d2980084f5d5cee9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:23.478756Z","signature_b64":"zpVDR/8ExtVsRjiY5L921qsx5FSBwTomOeCy2qJfGUkOBZ/JPDQlxQho6vEO2UxU6Ai+GnKoPKAVv1YggIj+Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc0a54fdafc7dcd96842dcbd0932ef07a7f12ba44cef37e1d2980084f5d5cee9","last_reissued_at":"2026-05-18T02:04:23.478047Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:23.478047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.3752","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":"2026-05-18T02:04:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jLjWLa9X90K6+RACR+RlF0kznIxLSG6x3tr88k9Fc9w3htirTJnwZwHZboJw7cslIknglQ7TbCPe/rbSCP+dAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:26:03.419640Z"},"content_sha256":"475548293aa311f214b6381414a5b2eaae2f1e1047424b4d8a0865446bbb186a","schema_version":"1.0","event_id":"sha256:475548293aa311f214b6381414a5b2eaae2f1e1047424b4d8a0865446bbb186a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:3QFFJ7NPY7ONS2CC3S6QSMXPA6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photometric redshifts and K-corrections for Sloan Digital Sky Survey Seven Data Release","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Ana Laura O'Mill, Diego Garc\\'ia Lambas, Fernanda Duplancic, Laerte Sodr\\'e Jr","submitted_at":"2010-12-16T21:00:12Z","abstract_excerpt":"We present a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Seven Data Release (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training set concluding that the best choice to improve redshift accuracy comprises the Main Galaxies Sample (MGS), the Luminous Red Galaxies, and galaxies of active galactic nuclei covering the redshift range 0<"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.3752","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":"2026-05-18T02:04:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MqPlEuNz6mLGzHfnso7QA9JFwcWWjoceYQr5kRsB4wGanfaZaYD/XqnO5GJiVSwDn8VMdR99X4oCjm+5yIymDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:26:03.420428Z"},"content_sha256":"c1f9bf8d37c3c7f7034aa7903d1d90517d6f6c341aabc86594a4604130122af8","schema_version":"1.0","event_id":"sha256:c1f9bf8d37c3c7f7034aa7903d1d90517d6f6c341aabc86594a4604130122af8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/bundle.json","state_url":"https://pith.science/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/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":"2026-05-31T00:26:03Z","links":{"resolver":"https://pith.science/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6","bundle":"https://pith.science/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/bundle.json","state":"https://pith.science/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3QFFJ7NPY7ONS2CC3S6QSMXPA6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:3QFFJ7NPY7ONS2CC3S6QSMXPA6","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":"9bf72516dde55ff51e39d77106fc38f00fd500bb268ce3609583defe318eb23c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-16T21:00:12Z","title_canon_sha256":"1cebef2236b158f3a99689d483a69ffe3ecb495b78e6aa8c05d564c691d076ba"},"schema_version":"1.0","source":{"id":"1012.3752","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.3752","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"arxiv_version","alias_value":"1012.3752v1","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.3752","created_at":"2026-05-18T02:04:23Z"},{"alias_kind":"pith_short_12","alias_value":"3QFFJ7NPY7ON","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"3QFFJ7NPY7ONS2CC","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"3QFFJ7NP","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:c1f9bf8d37c3c7f7034aa7903d1d90517d6f6c341aabc86594a4604130122af8","target":"graph","created_at":"2026-05-18T02:04:23Z","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 a catalogue of galaxy photometric redshifts and k-corrections for the Sloan Digital Sky Survey Seven Data Release (SDSS-DR7), available on the World Wide Web. The photometric redshifts were estimated with an artificial neural network using five ugriz bands, concentration indices and Petrosian radii in the g and r bands. We have explored our redshift estimates with different training set concluding that the best choice to improve redshift accuracy comprises the Main Galaxies Sample (MGS), the Luminous Red Galaxies, and galaxies of active galactic nuclei covering the redshift range 0<","authors_text":"Ana Laura O'Mill, Diego Garc\\'ia Lambas, Fernanda Duplancic, Laerte Sodr\\'e Jr","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-16T21:00:12Z","title":"Photometric redshifts and K-corrections for Sloan Digital Sky Survey Seven Data Release"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.3752","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":"sha256:475548293aa311f214b6381414a5b2eaae2f1e1047424b4d8a0865446bbb186a","target":"record","created_at":"2026-05-18T02:04:23Z","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":"9bf72516dde55ff51e39d77106fc38f00fd500bb268ce3609583defe318eb23c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-16T21:00:12Z","title_canon_sha256":"1cebef2236b158f3a99689d483a69ffe3ecb495b78e6aa8c05d564c691d076ba"},"schema_version":"1.0","source":{"id":"1012.3752","kind":"arxiv","version":1}},"canonical_sha256":"dc0a54fdafc7dcd96842dcbd0932ef07a7f12ba44cef37e1d2980084f5d5cee9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc0a54fdafc7dcd96842dcbd0932ef07a7f12ba44cef37e1d2980084f5d5cee9","first_computed_at":"2026-05-18T02:04:23.478047Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:23.478047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zpVDR/8ExtVsRjiY5L921qsx5FSBwTomOeCy2qJfGUkOBZ/JPDQlxQho6vEO2UxU6Ai+GnKoPKAVv1YggIj+Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:23.478756Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.3752","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:475548293aa311f214b6381414a5b2eaae2f1e1047424b4d8a0865446bbb186a","sha256:c1f9bf8d37c3c7f7034aa7903d1d90517d6f6c341aabc86594a4604130122af8"],"state_sha256":"028730337f321103f8f5c30db5e3ac7183942575e472604a7bc89439208401c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/FhDL+P3lAfyRkvjkWj7AVFshUnQSRrgshhvIH50rcVH7pVrrA5iHyLfzj/evNDlPif18aJEsm/MT1Lvji44CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:26:03.424096Z","bundle_sha256":"ca9bc9d58f11691cece45d2d9ffedf569a5661b447ecc5c729f39cedd5634756"}}