{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:EVY5NPMQRARL4QJTHN4TF42CS3","short_pith_number":"pith:EVY5NPMQ","canonical_record":{"source":{"id":"1212.0564","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-03T21:28:22Z","cross_cats_sorted":[],"title_canon_sha256":"f54ed8e734a238fb6c6223cf2c1547607ffbd0bde8782954184cd196948a206b","abstract_canon_sha256":"b471dec5c84d5edad29b7685d0395fbd12fc51eb258e509168f4e2d4430b4832"},"schema_version":"1.0"},"canonical_sha256":"2571d6bd908822be41333b7932f34296d2ef8c4977086f8578131074653e5360","source":{"kind":"arxiv","id":"1212.0564","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.0564","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.0564v1","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.0564","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"EVY5NPMQRARL","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EVY5NPMQRARL4QJT","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EVY5NPMQ","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:EVY5NPMQRARL4QJTHN4TF42CS3","target":"record","payload":{"canonical_record":{"source":{"id":"1212.0564","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-03T21:28:22Z","cross_cats_sorted":[],"title_canon_sha256":"f54ed8e734a238fb6c6223cf2c1547607ffbd0bde8782954184cd196948a206b","abstract_canon_sha256":"b471dec5c84d5edad29b7685d0395fbd12fc51eb258e509168f4e2d4430b4832"},"schema_version":"1.0"},"canonical_sha256":"2571d6bd908822be41333b7932f34296d2ef8c4977086f8578131074653e5360","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:48.157538Z","signature_b64":"GYZWBvfyEwDHKN3jGL1bEx6oPD4DFJzu95L+909pnjYUMDS8xiM+ZxJdaiyNk8roTiKZYPVqxssKs6oGEWMxBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2571d6bd908822be41333b7932f34296d2ef8c4977086f8578131074653e5360","last_reissued_at":"2026-05-18T01:52:48.157089Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:48.157089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.0564","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":"2026-05-18T01:52:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VMdh/9yzHskDH3Vrt0/BL6IyXmsKAvlnRDevTv6B5uIVRsU9LxzU+yvZXR38LKDjWqSWCpnSdfnjrAvd4mKlDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:56:34.700949Z"},"content_sha256":"2ca8c954014eb7de27dec52cf67fea2dbeb129feac317671aab69b4b9cd2262a","schema_version":"1.0","event_id":"sha256:2ca8c954014eb7de27dec52cf67fea2dbeb129feac317671aab69b4b9cd2262a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:EVY5NPMQRARL4QJTHN4TF42CS3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inside catalogs: a comparison of source extraction software","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Mercurio, G. Longo, M. Annunziatella, M. Brescia, S. Cavuoti","submitted_at":"2012-12-03T21:28:22Z","abstract_excerpt":"The scope of this paper is to compare the catalog extraction performances obtained using the new combination of SExtractor with PSFEx, against the more traditional and diffuse application of DAOPHOT with ALLSTAR; therefore, the paper may provide a guide for the selection of the most suitable catalog extraction software. Both software packages were tested on two kinds of simulated images having, respectively, a uniform spatial distribution of sources and an overdensity in the center. In both cases, SExtractor is able to generate a deeper catalog than DAOPHOT. Moreover, the use of neural network"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.0564","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":"2026-05-18T01:52:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Er2kLuxf3fGeNIwvBTM9Y4OhTfPtV3+e97cBUM7ACGCzFJ8f5MH0o8Kh7PXWZ44DoUGKHZHpW1XoIGJoCqICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:56:34.701294Z"},"content_sha256":"adbe68d15361ec217214e609ab2c8b42b30fdf2cd5b3735ae8556e7ebacb8198","schema_version":"1.0","event_id":"sha256:adbe68d15361ec217214e609ab2c8b42b30fdf2cd5b3735ae8556e7ebacb8198"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EVY5NPMQRARL4QJTHN4TF42CS3/bundle.json","state_url":"https://pith.science/pith/EVY5NPMQRARL4QJTHN4TF42CS3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EVY5NPMQRARL4QJTHN4TF42CS3/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":"2026-06-01T16:56:34Z","links":{"resolver":"https://pith.science/pith/EVY5NPMQRARL4QJTHN4TF42CS3","bundle":"https://pith.science/pith/EVY5NPMQRARL4QJTHN4TF42CS3/bundle.json","state":"https://pith.science/pith/EVY5NPMQRARL4QJTHN4TF42CS3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EVY5NPMQRARL4QJTHN4TF42CS3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:EVY5NPMQRARL4QJTHN4TF42CS3","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":"b471dec5c84d5edad29b7685d0395fbd12fc51eb258e509168f4e2d4430b4832","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-03T21:28:22Z","title_canon_sha256":"f54ed8e734a238fb6c6223cf2c1547607ffbd0bde8782954184cd196948a206b"},"schema_version":"1.0","source":{"id":"1212.0564","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.0564","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.0564v1","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.0564","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"EVY5NPMQRARL","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EVY5NPMQRARL4QJT","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EVY5NPMQ","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:adbe68d15361ec217214e609ab2c8b42b30fdf2cd5b3735ae8556e7ebacb8198","target":"graph","created_at":"2026-05-18T01:52:48Z","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":"The scope of this paper is to compare the catalog extraction performances obtained using the new combination of SExtractor with PSFEx, against the more traditional and diffuse application of DAOPHOT with ALLSTAR; therefore, the paper may provide a guide for the selection of the most suitable catalog extraction software. Both software packages were tested on two kinds of simulated images having, respectively, a uniform spatial distribution of sources and an overdensity in the center. In both cases, SExtractor is able to generate a deeper catalog than DAOPHOT. Moreover, the use of neural network","authors_text":"A. Mercurio, G. Longo, M. Annunziatella, M. Brescia, S. Cavuoti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-03T21:28:22Z","title":"Inside catalogs: a comparison of source extraction software"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.0564","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":"sha256:2ca8c954014eb7de27dec52cf67fea2dbeb129feac317671aab69b4b9cd2262a","target":"record","created_at":"2026-05-18T01:52:48Z","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":"b471dec5c84d5edad29b7685d0395fbd12fc51eb258e509168f4e2d4430b4832","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-03T21:28:22Z","title_canon_sha256":"f54ed8e734a238fb6c6223cf2c1547607ffbd0bde8782954184cd196948a206b"},"schema_version":"1.0","source":{"id":"1212.0564","kind":"arxiv","version":1}},"canonical_sha256":"2571d6bd908822be41333b7932f34296d2ef8c4977086f8578131074653e5360","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2571d6bd908822be41333b7932f34296d2ef8c4977086f8578131074653e5360","first_computed_at":"2026-05-18T01:52:48.157089Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:48.157089Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GYZWBvfyEwDHKN3jGL1bEx6oPD4DFJzu95L+909pnjYUMDS8xiM+ZxJdaiyNk8roTiKZYPVqxssKs6oGEWMxBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:48.157538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.0564","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ca8c954014eb7de27dec52cf67fea2dbeb129feac317671aab69b4b9cd2262a","sha256:adbe68d15361ec217214e609ab2c8b42b30fdf2cd5b3735ae8556e7ebacb8198"],"state_sha256":"4902d2bd9c42599e7d7b9c8f9d9d26fce6c59896885150c66ff16d293b88cac4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WhJS8zKUXSbdUL7i5higbVS7X7yMx9VyZgB6SOaBKPx2otN/CFLYkZ5kKIu2rXW/z0GXxoSb3KPRI8HuBMGDDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:56:34.703427Z","bundle_sha256":"17c180975a7c629cbdecef85ea6d69e3f28b1957f00107d39f11e5ad90e59595"}}