{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:2YJOJK5B2Y2FF23QZBOX2HXY74","short_pith_number":"pith:2YJOJK5B","canonical_record":{"source":{"id":"1002.3648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-18T23:54:09Z","cross_cats_sorted":[],"title_canon_sha256":"eefdce5a152cae6fd07c0ebe295107e0f80dda916f3d79a7c4b48163b148107e","abstract_canon_sha256":"a88a4bb497ca8f7f0aa5a952923c9a726f438fd80b22b3fbba2e9d9e5b46f0b5"},"schema_version":"1.0"},"canonical_sha256":"d612e4aba1d63452eb70c85d7d1ef8ff1851ea60d6fe51592d6d6e9ac738548d","source":{"kind":"arxiv","id":"1002.3648","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.3648","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"arxiv_version","alias_value":"1002.3648v1","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.3648","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"pith_short_12","alias_value":"2YJOJK5B2Y2F","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2YJOJK5B2Y2FF23Q","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2YJOJK5B","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:2YJOJK5B2Y2FF23QZBOX2HXY74","target":"record","payload":{"canonical_record":{"source":{"id":"1002.3648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-18T23:54:09Z","cross_cats_sorted":[],"title_canon_sha256":"eefdce5a152cae6fd07c0ebe295107e0f80dda916f3d79a7c4b48163b148107e","abstract_canon_sha256":"a88a4bb497ca8f7f0aa5a952923c9a726f438fd80b22b3fbba2e9d9e5b46f0b5"},"schema_version":"1.0"},"canonical_sha256":"d612e4aba1d63452eb70c85d7d1ef8ff1851ea60d6fe51592d6d6e9ac738548d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:59.232874Z","signature_b64":"jFAA/VVZubnxm0nHy7VXD08hp1sjdfyw2vmfqzrOOO+CHVqPX6EL3UXqEe2MJNbL9WDKzaN5VDN/BkIBh9EqBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d612e4aba1d63452eb70c85d7d1ef8ff1851ea60d6fe51592d6d6e9ac738548d","last_reissued_at":"2026-05-18T02:08:59.232162Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:59.232162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.3648","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":"2026-05-18T02:08:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T0CO+GbBFWP8Tk8nmacvmg7G42z8A/oPgJNOIZMhP3W7hOwceD1ZZKF0Wh0wKVgb0Dr38zjbTrY+/fz85ap5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:37:51.859017Z"},"content_sha256":"1eeb5b1a6a3f61757746e569a79dbf42d8cf4628dc3850455fdbff190c11432a","schema_version":"1.0","event_id":"sha256:1eeb5b1a6a3f61757746e569a79dbf42d8cf4628dc3850455fdbff190c11432a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:2YJOJK5B2Y2FF23QZBOX2HXY74","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local Benchmarks for the Evolution of Major-Merger Galaxies -- Spitzer Observations of a K-Band Selected Sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"C. Kevin Xu, Donovan Domingue, Jason Surace, Jiasheng Huang, Joseph M. Mazzarella, Nanyao Lu, Roc Cutri, Wei-hsin Sun, Yi-Wen Cheng, Yu Gao","submitted_at":"2010-02-18T23:54:09Z","abstract_excerpt":"We present Spitzer observations for a sample of close major-merger galaxy pairs (KPAIR sample) selected from 2MASS/SDSS-DR3 cross-matches. The goals are to study the star formation activity in these galaxies and to set a local bench mark for the cosmic evolution of close major mergers. The Spitzer KPAIR sample (27 pairs, 54 galaxies) includes all spectroscopically confirmed S+S and S+E pairs in a parent sample that is complete for primaries brighter than K=12.5 mag, projected separations of 5< s < 20 kpc/h, and mass ratios<2.5. The Spitzer data consist of images in 7 bands (3.6, 4.5, 5.8, 8, 2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.3648","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":"2026-05-18T02:08:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l9cfJg2lqTQ4Z69uRkPAoYYo6T8/UddWsMTIgVkkrJ0NpTbZ6fYzCoNT2oUr6BJ1z0F6hJTzSctBH9lHy775Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:37:51.859375Z"},"content_sha256":"ed8a1aeedf8cad6165726fd85fa728ecfe613376f4dcff70339205da2f485a12","schema_version":"1.0","event_id":"sha256:ed8a1aeedf8cad6165726fd85fa728ecfe613376f4dcff70339205da2f485a12"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/bundle.json","state_url":"https://pith.science/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/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":"2026-06-01T17:37:51Z","links":{"resolver":"https://pith.science/pith/2YJOJK5B2Y2FF23QZBOX2HXY74","bundle":"https://pith.science/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/bundle.json","state":"https://pith.science/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2YJOJK5B2Y2FF23QZBOX2HXY74/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:2YJOJK5B2Y2FF23QZBOX2HXY74","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":"a88a4bb497ca8f7f0aa5a952923c9a726f438fd80b22b3fbba2e9d9e5b46f0b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-18T23:54:09Z","title_canon_sha256":"eefdce5a152cae6fd07c0ebe295107e0f80dda916f3d79a7c4b48163b148107e"},"schema_version":"1.0","source":{"id":"1002.3648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.3648","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"arxiv_version","alias_value":"1002.3648v1","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.3648","created_at":"2026-05-18T02:08:59Z"},{"alias_kind":"pith_short_12","alias_value":"2YJOJK5B2Y2F","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"2YJOJK5B2Y2FF23Q","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"2YJOJK5B","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:ed8a1aeedf8cad6165726fd85fa728ecfe613376f4dcff70339205da2f485a12","target":"graph","created_at":"2026-05-18T02:08:59Z","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 Spitzer observations for a sample of close major-merger galaxy pairs (KPAIR sample) selected from 2MASS/SDSS-DR3 cross-matches. The goals are to study the star formation activity in these galaxies and to set a local bench mark for the cosmic evolution of close major mergers. The Spitzer KPAIR sample (27 pairs, 54 galaxies) includes all spectroscopically confirmed S+S and S+E pairs in a parent sample that is complete for primaries brighter than K=12.5 mag, projected separations of 5< s < 20 kpc/h, and mass ratios<2.5. The Spitzer data consist of images in 7 bands (3.6, 4.5, 5.8, 8, 2","authors_text":"C. Kevin Xu, Donovan Domingue, Jason Surace, Jiasheng Huang, Joseph M. Mazzarella, Nanyao Lu, Roc Cutri, Wei-hsin Sun, Yi-Wen Cheng, Yu Gao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-18T23:54:09Z","title":"Local Benchmarks for the Evolution of Major-Merger Galaxies -- Spitzer Observations of a K-Band Selected Sample"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.3648","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":"sha256:1eeb5b1a6a3f61757746e569a79dbf42d8cf4628dc3850455fdbff190c11432a","target":"record","created_at":"2026-05-18T02:08:59Z","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":"a88a4bb497ca8f7f0aa5a952923c9a726f438fd80b22b3fbba2e9d9e5b46f0b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-18T23:54:09Z","title_canon_sha256":"eefdce5a152cae6fd07c0ebe295107e0f80dda916f3d79a7c4b48163b148107e"},"schema_version":"1.0","source":{"id":"1002.3648","kind":"arxiv","version":1}},"canonical_sha256":"d612e4aba1d63452eb70c85d7d1ef8ff1851ea60d6fe51592d6d6e9ac738548d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d612e4aba1d63452eb70c85d7d1ef8ff1851ea60d6fe51592d6d6e9ac738548d","first_computed_at":"2026-05-18T02:08:59.232162Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:59.232162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jFAA/VVZubnxm0nHy7VXD08hp1sjdfyw2vmfqzrOOO+CHVqPX6EL3UXqEe2MJNbL9WDKzaN5VDN/BkIBh9EqBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:59.232874Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.3648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1eeb5b1a6a3f61757746e569a79dbf42d8cf4628dc3850455fdbff190c11432a","sha256:ed8a1aeedf8cad6165726fd85fa728ecfe613376f4dcff70339205da2f485a12"],"state_sha256":"a1c904ae1a54fee41bba8ff1843a44dbd1d03e7c5c70fbd14ad1b93a75fb40d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yr8/pG+GNAlyb0+f4ZuINjpXIE2KKRw6gP8NmxrTSPXpvg0z1vkpXd0BJc//G4xlqQtrPZR1Eu0YrOqbvIxTAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T17:37:51.861284Z","bundle_sha256":"91802eaaa90a8f3629c021c4e8b458e35734c4d48bd9fda548f2e407dd6b70d2"}}