{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:5RANLPSB2XUP2R7JRLX7X3IRR2","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":"8c90687751d0a77598c7fafad8c846b045c4bd2b02de1df9a655edf878697305","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-17T20:00:05Z","title_canon_sha256":"f7b91e327743ee9a9d40bcd5a03d021634c9b3c2818d2bf7169ff44fd3bb5526"},"schema_version":"1.0","source":{"id":"1309.4458","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4458","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4458v1","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4458","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"pith_short_12","alias_value":"5RANLPSB2XUP","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"5RANLPSB2XUP2R7J","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"5RANLPSB","created_at":"2026-05-18T12:27:34Z"}],"graph_snapshots":[{"event_id":"sha256:880d385483dab95b464ac40058dc2e9d8f9dbb31e827dcdc08db840cc1e11b0e","target":"graph","created_at":"2026-05-18T01:47:36Z","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"},"paper":{"abstract_excerpt":"We present the first robust measurement of the high redshift mass-metallicity (MZ) relation at 10^{8}< M/M_{\\sun} < 10^{10}, obtained by stacking spectra of 83 emission-line galaxies with secure redshifts between 1.3 < z < 2.3. For these redshifts, infrared grism spectroscopy with the Hubble Space Telescope Wide Field Camera 3 is sensitive to the R23 metallicity diagnostic: ([OII]3726,3729 + [OIII] 4959,5007)/H\\beta. Using spectra stacked in four mass quartiles, we find a MZ relation that declines significantly with decreasing mass, extending from 12+log(O/H) = 8.8 at M=10^{9.8} M_{\\sun} to 12","authors_text":"Alaina Henry, Alan Dressler, Alberto Dominguez, Alejandro G. Bedregal, Amber Straughn, Andrew J. Bunker, Brian Siana, Claudia Scarlata, Crystal L. Martin, Daniel Masters, Hakim Atek, Harry Teplitz, James W. Colbert, Marc Rafelski, Matthew Malkan, Nathaniel Ross, Nimish Hathi, Patrick McCarthy","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-17T20:00:05Z","title":"Low Masses and High Redshifts: The Evolution of the Mass-Metallicity Relation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4458","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":"sha256:452c4e64bbba9cf08aeddab6388944378689acf4dae47c4ef76ec8b182c20089","target":"record","created_at":"2026-05-18T01:47:36Z","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":"8c90687751d0a77598c7fafad8c846b045c4bd2b02de1df9a655edf878697305","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-17T20:00:05Z","title_canon_sha256":"f7b91e327743ee9a9d40bcd5a03d021634c9b3c2818d2bf7169ff44fd3bb5526"},"schema_version":"1.0","source":{"id":"1309.4458","kind":"arxiv","version":1}},"canonical_sha256":"ec40d5be41d5e8fd47e98aeffbed118eacb21abf0b0b70e6e40f9d27884c8bfe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec40d5be41d5e8fd47e98aeffbed118eacb21abf0b0b70e6e40f9d27884c8bfe","first_computed_at":"2026-05-18T01:47:36.258407Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:36.258407Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qLPd2N/ILYpdjfhHTI8MZcf4UF6ecJcIb+mDpmRJCcwwS7o1wzITTSHO4TroHTPT0XsVCSAobT3s0qkWicwiBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:36.258894Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.4458","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:452c4e64bbba9cf08aeddab6388944378689acf4dae47c4ef76ec8b182c20089","sha256:880d385483dab95b464ac40058dc2e9d8f9dbb31e827dcdc08db840cc1e11b0e"],"state_sha256":"e86a4a7b36ef25d82f92a9515f89acf3d9d46e575dc78e6902ccefbbed07bff8"}