{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:FXIT6UZCUQQU3F4EDBGN5F34YA","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":"106aa3cab6734b7ebf7a5a2793029ccb60ca7639db29c7b3a43166e1f6829063","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-04-18T15:39:23Z","title_canon_sha256":"d9486b4a716930d16c5efc17606957aa4095bdd1ab19b15303d6184f2c7c854c"},"schema_version":"1.0","source":{"id":"astro-ph/0604383","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0604383","created_at":"2026-07-04T16:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0604383v1","created_at":"2026-07-04T16:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0604383","created_at":"2026-07-04T16:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"FXIT6UZCUQQU","created_at":"2026-07-04T16:58:36Z"},{"alias_kind":"pith_short_16","alias_value":"FXIT6UZCUQQU3F4E","created_at":"2026-07-04T16:58:36Z"},{"alias_kind":"pith_short_8","alias_value":"FXIT6UZC","created_at":"2026-07-04T16:58:36Z"}],"graph_snapshots":[{"event_id":"sha256:f5fbd8724e423848965797962fdb669fdceb3393b96923f5ed3e900a5c1d0626","target":"graph","created_at":"2026-07-04T16:58:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0604383/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have performed a deep spectroscopic survey of extremely red galaxies on the GOODS-South field, using GMOS on Gemini South. We present here spectra and redshifts for 16 ERGs at 0.87<z<2.02, to a limit K=20.2. The ERHs are a mixture of spheroidals, mergers and spirals, with one AGN. For at least 10 of these galaxies we observe [OII] emission lines. We perform an age-dating analysis by fitting the spectra and 9-band photometry of the ERGs with models of passively evolving stellar populations combined with a younger star-forming component. The best-fitting ages for the old stellar components ra","authors_text":"Chris Willott, David Crampton, James Dunlop, Karina Caputi, Nathan Roche, Ross McLure","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-04-18T15:39:23Z","title":"Deep GMOS Spectroscopy of Extremely Red Galaxies in GOODS-South: Ellipticals, Mergers and Red Spirals at 1<z<2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0604383","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:fce3265c5d4ae2e71217eb1bdb69adbedbb0661951c04d1275200b9c9e60c0f1","target":"record","created_at":"2026-07-04T16:58:36Z","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":"106aa3cab6734b7ebf7a5a2793029ccb60ca7639db29c7b3a43166e1f6829063","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-04-18T15:39:23Z","title_canon_sha256":"d9486b4a716930d16c5efc17606957aa4095bdd1ab19b15303d6184f2c7c854c"},"schema_version":"1.0","source":{"id":"astro-ph/0604383","kind":"arxiv","version":1}},"canonical_sha256":"2dd13f5322a4214d9784184cde977cc03d1799a8060dc6f2d2223a005db39cd6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2dd13f5322a4214d9784184cde977cc03d1799a8060dc6f2d2223a005db39cd6","first_computed_at":"2026-07-04T16:58:36.962429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:58:36.962429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bIzPStnszmKdgjH+2iQKkWquT2g+zjNZUfFqx2mWYylmPohULxvvMD0WDEQaKeDm1ljbs9OFR8of1DNH5bwDCg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:58:36.962812Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0604383","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fce3265c5d4ae2e71217eb1bdb69adbedbb0661951c04d1275200b9c9e60c0f1","sha256:f5fbd8724e423848965797962fdb669fdceb3393b96923f5ed3e900a5c1d0626"],"state_sha256":"364a138b929a09038f4b0e181ff3f6f126d788fec875fe2c80f85fe27efaab29"}