{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GO4LFMLE7MFML63FFJIN2ZST77","short_pith_number":"pith:GO4LFMLE","canonical_record":{"source":{"id":"1805.04110","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-10T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"8c1d13852fd23fe7c72e54449b4e8a08a0b5b6f7506fbe1b1b287688cb22adae","abstract_canon_sha256":"0f8005d30d6a527a213127944df62535e35946aad2169ff7f9a3c7f80790b4b8"},"schema_version":"1.0"},"canonical_sha256":"33b8b2b164fb0ac5fb652a50dd6653fff2bdc0de3171c47f77bb2b7bfe28a127","source":{"kind":"arxiv","id":"1805.04110","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.04110","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"arxiv_version","alias_value":"1805.04110v2","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.04110","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"pith_short_12","alias_value":"GO4LFMLE7MFM","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GO4LFMLE7MFML63F","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GO4LFMLE","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GO4LFMLE7MFML63FFJIN2ZST77","target":"record","payload":{"canonical_record":{"source":{"id":"1805.04110","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-10T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"8c1d13852fd23fe7c72e54449b4e8a08a0b5b6f7506fbe1b1b287688cb22adae","abstract_canon_sha256":"0f8005d30d6a527a213127944df62535e35946aad2169ff7f9a3c7f80790b4b8"},"schema_version":"1.0"},"canonical_sha256":"33b8b2b164fb0ac5fb652a50dd6653fff2bdc0de3171c47f77bb2b7bfe28a127","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:41.392440Z","signature_b64":"jINrzxxMtI1arJypUoSUe8TUG/N7k+QjJ2cL8466yfJavy/ziJ7ZhbTm6cy4DWpXkz3lq1J7h58LMyHKkClvCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33b8b2b164fb0ac5fb652a50dd6653fff2bdc0de3171c47f77bb2b7bfe28a127","last_reissued_at":"2026-05-17T23:57:41.391985Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:41.391985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.04110","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:57:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A5XIHrRWxClnuKVALzqoWb7GUds8w+GX3ZjgaHvfrlW/nWImHWJwQbQziNGuNoLviNHgvAGh0+BnWGfV/9D9AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T23:15:34.089224Z"},"content_sha256":"bf88fc587908300ab051088047afa66d9f57682504066a1c8518ac419fbf53dc","schema_version":"1.0","event_id":"sha256:bf88fc587908300ab051088047afa66d9f57682504066a1c8518ac419fbf53dc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GO4LFMLE7MFML63FFJIN2ZST77","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Late Bloomer Galaxies: Growing Up in Cosmic Autumn","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2) ((1) Carnegie Observatories, (2) Princeton University), Alan Dressler (1), Daniel D. Kelson (1), Louis E. Abramson (1","submitted_at":"2018-05-10T18:00:01Z","abstract_excerpt":"Late bloomers are massive ($M_* >10^{10}\\,M_\\odot$) galaxies at $z<1$ that formed the majority of their stars within $\\sim$2 Gyr of the epoch of observation. Our improved methodology for deriving star formation histories (SFHs) of galaxies at redshifts $0.45 < z < 0.75$ from the Carnegie-Spitzer-IMACS Survey includes confidence intervals that robustly distinguish late bloomers from \"old\" galaxies. We use simulated SFHs to test for \"false positives\" and contamination from old galaxies to demonstrate that the late bloomer population is not an artifact of our template modeling technique. We show "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.04110","kind":"arxiv","version":2},"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":"2026-05-17T23:57:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"94rcUi7gmNUHwygWQPbDSr457EQZ7FxR9Tx7W3QYa/4JNhBsqn4wKoqNnp4KLSY6NYI2EYWybgRLxnTyEYfsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T23:15:34.089907Z"},"content_sha256":"49d3098250d81c07b59a16f12f7a37dadbadeaf1266a77ed69c18052aefc4bc5","schema_version":"1.0","event_id":"sha256:49d3098250d81c07b59a16f12f7a37dadbadeaf1266a77ed69c18052aefc4bc5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GO4LFMLE7MFML63FFJIN2ZST77/bundle.json","state_url":"https://pith.science/pith/GO4LFMLE7MFML63FFJIN2ZST77/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GO4LFMLE7MFML63FFJIN2ZST77/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":"2026-05-24T23:15:34Z","links":{"resolver":"https://pith.science/pith/GO4LFMLE7MFML63FFJIN2ZST77","bundle":"https://pith.science/pith/GO4LFMLE7MFML63FFJIN2ZST77/bundle.json","state":"https://pith.science/pith/GO4LFMLE7MFML63FFJIN2ZST77/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GO4LFMLE7MFML63FFJIN2ZST77/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GO4LFMLE7MFML63FFJIN2ZST77","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":"0f8005d30d6a527a213127944df62535e35946aad2169ff7f9a3c7f80790b4b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-10T18:00:01Z","title_canon_sha256":"8c1d13852fd23fe7c72e54449b4e8a08a0b5b6f7506fbe1b1b287688cb22adae"},"schema_version":"1.0","source":{"id":"1805.04110","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.04110","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"arxiv_version","alias_value":"1805.04110v2","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.04110","created_at":"2026-05-17T23:57:41Z"},{"alias_kind":"pith_short_12","alias_value":"GO4LFMLE7MFM","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GO4LFMLE7MFML63F","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GO4LFMLE","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:49d3098250d81c07b59a16f12f7a37dadbadeaf1266a77ed69c18052aefc4bc5","target":"graph","created_at":"2026-05-17T23:57:41Z","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":"Late bloomers are massive ($M_* >10^{10}\\,M_\\odot$) galaxies at $z<1$ that formed the majority of their stars within $\\sim$2 Gyr of the epoch of observation. Our improved methodology for deriving star formation histories (SFHs) of galaxies at redshifts $0.45 < z < 0.75$ from the Carnegie-Spitzer-IMACS Survey includes confidence intervals that robustly distinguish late bloomers from \"old\" galaxies. We use simulated SFHs to test for \"false positives\" and contamination from old galaxies to demonstrate that the late bloomer population is not an artifact of our template modeling technique. We show ","authors_text":"2) ((1) Carnegie Observatories, (2) Princeton University), Alan Dressler (1), Daniel D. Kelson (1), Louis E. Abramson (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-10T18:00:01Z","title":"Late Bloomer Galaxies: Growing Up in Cosmic Autumn"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.04110","kind":"arxiv","version":2},"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:bf88fc587908300ab051088047afa66d9f57682504066a1c8518ac419fbf53dc","target":"record","created_at":"2026-05-17T23:57:41Z","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":"0f8005d30d6a527a213127944df62535e35946aad2169ff7f9a3c7f80790b4b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-10T18:00:01Z","title_canon_sha256":"8c1d13852fd23fe7c72e54449b4e8a08a0b5b6f7506fbe1b1b287688cb22adae"},"schema_version":"1.0","source":{"id":"1805.04110","kind":"arxiv","version":2}},"canonical_sha256":"33b8b2b164fb0ac5fb652a50dd6653fff2bdc0de3171c47f77bb2b7bfe28a127","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33b8b2b164fb0ac5fb652a50dd6653fff2bdc0de3171c47f77bb2b7bfe28a127","first_computed_at":"2026-05-17T23:57:41.391985Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:41.391985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jINrzxxMtI1arJypUoSUe8TUG/N7k+QjJ2cL8466yfJavy/ziJ7ZhbTm6cy4DWpXkz3lq1J7h58LMyHKkClvCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:41.392440Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.04110","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf88fc587908300ab051088047afa66d9f57682504066a1c8518ac419fbf53dc","sha256:49d3098250d81c07b59a16f12f7a37dadbadeaf1266a77ed69c18052aefc4bc5"],"state_sha256":"18cfeda1c05386e926a321b0376b5d471133dbc16b6dcf0ac7ad065da995314a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7sxnFbzt71pyJ+CXOMp1iaDlPJElS4RqmXwh66ONZxrUIgil7iG2IWr65cDkiBudvnjlLiOA98iTfX9odUjLAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T23:15:34.093455Z","bundle_sha256":"01f83c13117289ff546995851337d0d1bc91a18bfbcd5735ade092e9959cdde2"}}