{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:KJ2Z4LH46UGM4T6RUCXWAOYUYR","short_pith_number":"pith:KJ2Z4LH4","canonical_record":{"source":{"id":"1012.2383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T21:00:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"61513d3aba5d3d4bf5b66bc9431077242812b6d0ed3a236d488b4a72c42c3561","abstract_canon_sha256":"17df4b59f2c94ca1c3f431ebb06588b8cfd08165fb6b8dd6423a4169e7c466d4"},"schema_version":"1.0"},"canonical_sha256":"52759e2cfcf50cce4fd1a0af603b14c4523dea4b08b336ca511b603938a49439","source":{"kind":"arxiv","id":"1012.2383","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.2383","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"arxiv_version","alias_value":"1012.2383v1","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.2383","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"pith_short_12","alias_value":"KJ2Z4LH46UGM","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"KJ2Z4LH46UGM4T6R","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"KJ2Z4LH4","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:KJ2Z4LH46UGM4T6RUCXWAOYUYR","target":"record","payload":{"canonical_record":{"source":{"id":"1012.2383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T21:00:07Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"61513d3aba5d3d4bf5b66bc9431077242812b6d0ed3a236d488b4a72c42c3561","abstract_canon_sha256":"17df4b59f2c94ca1c3f431ebb06588b8cfd08165fb6b8dd6423a4169e7c466d4"},"schema_version":"1.0"},"canonical_sha256":"52759e2cfcf50cce4fd1a0af603b14c4523dea4b08b336ca511b603938a49439","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:30.295700Z","signature_b64":"bqeRq0Tvw8MdAoAGpBVA8TLBsPhjbNDdL5fOsKQbuKHhY+3vvrH1StyVALW9cDMZLf6k5um+ertRuZa7PSguDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52759e2cfcf50cce4fd1a0af603b14c4523dea4b08b336ca511b603938a49439","last_reissued_at":"2026-05-18T02:04:30.295126Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:30.295126Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.2383","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":"2026-05-18T02:04:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F8nTFM1gdP8LGeehcYsXmnGnHXuN1UUhx6G6LbCWI9L1P8sOUfrW1gCBUTl7pMTQZGFDlvkbPl+PJ0Lx4m8PCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:30:03.160055Z"},"content_sha256":"bba7fe501e7f645d4b60aebf105e6974453f8ffcef24ef8852ff543f964abac3","schema_version":"1.0","event_id":"sha256:bba7fe501e7f645d4b60aebf105e6974453f8ffcef24ef8852ff543f964abac3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:KJ2Z4LH46UGM4T6RUCXWAOYUYR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"B. Davies, C. J. Evans (UK ATC), D. F. Figer, G. Rousset, J.-G. Cuby, M. D Lehnert, M. Puech, R.-P. Kudritzki, S. L. Morris, Y. Yang","submitted_at":"2010-12-10T21:00:07Z","abstract_excerpt":"We present simulated J-band spectroscopy of red giants and supergiants with a 42m European Extremely Large Telescope (E-ELT), using tools developed toward the EAGLE Phase A instrument study. The simulated spectra are used to demonstrate the validity of the 1.15-1.22 micron region to recover accurate stellar metallicities from Solar and metal-poor (one tenth Solar) spectral templates. From tests at spectral resolving powers of four and ten thousand, we require continuum signal-to-noise ratios in excess of 50 (per two-pixel resolution element) to recover the input metallicity to within 0.1 dex. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.2383","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":"2026-05-18T02:04:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ra0cS5vIxUTF58CXPriAz9WtWJaRKPpA+fkGfIErPqlh9pmvdP6c2WQ/f4tl77yt+sSEpgcjBeEsQD4+Fb9xDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:30:03.160766Z"},"content_sha256":"de4c35b43ccf9c03cfa39808d5210e64d07e0e060d3a3e8460fb9a29e4ea400d","schema_version":"1.0","event_id":"sha256:de4c35b43ccf9c03cfa39808d5210e64d07e0e060d3a3e8460fb9a29e4ea400d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/bundle.json","state_url":"https://pith.science/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/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":"2026-05-25T20:30:03Z","links":{"resolver":"https://pith.science/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR","bundle":"https://pith.science/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/bundle.json","state":"https://pith.science/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJ2Z4LH46UGM4T6RUCXWAOYUYR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:KJ2Z4LH46UGM4T6RUCXWAOYUYR","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":"17df4b59f2c94ca1c3f431ebb06588b8cfd08165fb6b8dd6423a4169e7c466d4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T21:00:07Z","title_canon_sha256":"61513d3aba5d3d4bf5b66bc9431077242812b6d0ed3a236d488b4a72c42c3561"},"schema_version":"1.0","source":{"id":"1012.2383","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.2383","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"arxiv_version","alias_value":"1012.2383v1","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.2383","created_at":"2026-05-18T02:04:30Z"},{"alias_kind":"pith_short_12","alias_value":"KJ2Z4LH46UGM","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"KJ2Z4LH46UGM4T6R","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"KJ2Z4LH4","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:de4c35b43ccf9c03cfa39808d5210e64d07e0e060d3a3e8460fb9a29e4ea400d","target":"graph","created_at":"2026-05-18T02:04:30Z","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 simulated J-band spectroscopy of red giants and supergiants with a 42m European Extremely Large Telescope (E-ELT), using tools developed toward the EAGLE Phase A instrument study. The simulated spectra are used to demonstrate the validity of the 1.15-1.22 micron region to recover accurate stellar metallicities from Solar and metal-poor (one tenth Solar) spectral templates. From tests at spectral resolving powers of four and ten thousand, we require continuum signal-to-noise ratios in excess of 50 (per two-pixel resolution element) to recover the input metallicity to within 0.1 dex. ","authors_text":"B. Davies, C. J. Evans (UK ATC), D. F. Figer, G. Rousset, J.-G. Cuby, M. D Lehnert, M. Puech, R.-P. Kudritzki, S. L. Morris, Y. Yang","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T21:00:07Z","title":"Stellar metallicities beyond the Local Group: the potential of J-band spectroscopy with extremely large telescopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.2383","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:bba7fe501e7f645d4b60aebf105e6974453f8ffcef24ef8852ff543f964abac3","target":"record","created_at":"2026-05-18T02:04:30Z","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":"17df4b59f2c94ca1c3f431ebb06588b8cfd08165fb6b8dd6423a4169e7c466d4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-12-10T21:00:07Z","title_canon_sha256":"61513d3aba5d3d4bf5b66bc9431077242812b6d0ed3a236d488b4a72c42c3561"},"schema_version":"1.0","source":{"id":"1012.2383","kind":"arxiv","version":1}},"canonical_sha256":"52759e2cfcf50cce4fd1a0af603b14c4523dea4b08b336ca511b603938a49439","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52759e2cfcf50cce4fd1a0af603b14c4523dea4b08b336ca511b603938a49439","first_computed_at":"2026-05-18T02:04:30.295126Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:30.295126Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bqeRq0Tvw8MdAoAGpBVA8TLBsPhjbNDdL5fOsKQbuKHhY+3vvrH1StyVALW9cDMZLf6k5um+ertRuZa7PSguDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:30.295700Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.2383","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bba7fe501e7f645d4b60aebf105e6974453f8ffcef24ef8852ff543f964abac3","sha256:de4c35b43ccf9c03cfa39808d5210e64d07e0e060d3a3e8460fb9a29e4ea400d"],"state_sha256":"f3e68c849703120c49e07b286f6b0f4ee6711227edb720f736eab61f8f980fe2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UY1Igz14kBVQ3oVh4dd1Wsyj2PLLQaweR0sw00p2hC9Y69yYIlOL4SJZgyMnl0RiFNSLmcm5x/A+FILg+jKdDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:30:03.164668Z","bundle_sha256":"5063a0dbadf1bb886793cbeb04d35dc989bd7abf214cab009b42bb201a73487d"}}