{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:67HQ7EVKF6ACKZ723ZKJIFPFXE","short_pith_number":"pith:67HQ7EVK","canonical_record":{"source":{"id":"1702.04352","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-14T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"7b6c2de89cac1729ff1ec5444afa969136dea63804dc3574562f9a919a81bf44","abstract_canon_sha256":"75d9fd945acaa164b4288608b58cb81cd55fef79b0d29e8f8ac1e07420146e8d"},"schema_version":"1.0"},"canonical_sha256":"f7cf0f92aa2f802567fade549415e5b90009e0f662f7323743fa54e194f37d7c","source":{"kind":"arxiv","id":"1702.04352","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04352","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04352v1","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04352","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"pith_short_12","alias_value":"67HQ7EVKF6AC","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"67HQ7EVKF6ACKZ72","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"67HQ7EVK","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:67HQ7EVKF6ACKZ723ZKJIFPFXE","target":"record","payload":{"canonical_record":{"source":{"id":"1702.04352","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-14T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"7b6c2de89cac1729ff1ec5444afa969136dea63804dc3574562f9a919a81bf44","abstract_canon_sha256":"75d9fd945acaa164b4288608b58cb81cd55fef79b0d29e8f8ac1e07420146e8d"},"schema_version":"1.0"},"canonical_sha256":"f7cf0f92aa2f802567fade549415e5b90009e0f662f7323743fa54e194f37d7c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:28.990934Z","signature_b64":"M0Lno5BnPMuNL5LDN1KDp2MH6SQkWyzHNsSsETeBvwvjmVZkwxwtWxwiwrMcMHd1frdQlqCfyx6IpFNXU5i6AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7cf0f92aa2f802567fade549415e5b90009e0f662f7323743fa54e194f37d7c","last_reissued_at":"2026-05-18T00:46:28.990346Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:28.990346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.04352","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":"2026-05-18T00:46:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LTvTbcgPyCX5mUGRG4AHzo2gaEqvQfUpQHfkKusjnzFgSxyp135ONUT902SR/MVdckOS/5F0qHOp4R6iwUjeAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:04:21.362682Z"},"content_sha256":"20e6635b2829e957023d76019464c132a1beda847a6d888ee53e0fd9a5a726b2","schema_version":"1.0","event_id":"sha256:20e6635b2829e957023d76019464c132a1beda847a6d888ee53e0fd9a5a726b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:67HQ7EVKF6ACKZ723ZKJIFPFXE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-infrared spectroscopy of 5 ultra-massive galaxies at 1.7 < z < 2.7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Muzzin, Britt Lundgren, Danilo Marchesini, David Wake, Erin Kado-Fong, Gabriel Brammer, Gregory Rudnick, Ivo Labb\\'e, Katherine Whitaker, Mauro Stefanon, Pieter van Dokkum, Rachel Bezanson, Rik Williams, Ryan Quadri, Tomer Tal, Z. Cemile Marsan","submitted_at":"2017-02-14T19:00:00Z","abstract_excerpt":"We present the results of a pilot near-infrared (NIR) spectroscopic campaign of five very massive galaxies ($\\log(\\text{M}_\\star/\\text{M}_\\odot)>11.45$) in the range of $1.7<z<2.7$. We measure an absorption feature redshift for one galaxy at $z_\\text{spec}=2.000\\pm0.006$. For the remaining galaxies, we combine the photometry with the continuum from the spectra to estimate continuum redshifts and stellar population properties. We define a continuum redshift ($z_{\\rm cont}$ ) as one in which the redshift is estimated probabilistically using EAZY from the combination of catalog photometry and the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04352","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":"2026-05-18T00:46:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"igfg0yQ6dzbmla/z26zHXL+DoXnrUH6yKJ/L6c4AbLW8RCoqNcLSV9xbEBc1jOCExZKt3cQJ1hEsT3O2zgL7Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:04:21.363365Z"},"content_sha256":"d79781f5349282aa999a066266475ee7af8b479a55af24d3c6d7c00e4a5167b3","schema_version":"1.0","event_id":"sha256:d79781f5349282aa999a066266475ee7af8b479a55af24d3c6d7c00e4a5167b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/bundle.json","state_url":"https://pith.science/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/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":"2026-05-24T15:04:21Z","links":{"resolver":"https://pith.science/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE","bundle":"https://pith.science/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/bundle.json","state":"https://pith.science/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/67HQ7EVKF6ACKZ723ZKJIFPFXE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:67HQ7EVKF6ACKZ723ZKJIFPFXE","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":"75d9fd945acaa164b4288608b58cb81cd55fef79b0d29e8f8ac1e07420146e8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-14T19:00:00Z","title_canon_sha256":"7b6c2de89cac1729ff1ec5444afa969136dea63804dc3574562f9a919a81bf44"},"schema_version":"1.0","source":{"id":"1702.04352","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04352","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04352v1","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04352","created_at":"2026-05-18T00:46:28Z"},{"alias_kind":"pith_short_12","alias_value":"67HQ7EVKF6AC","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"67HQ7EVKF6ACKZ72","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"67HQ7EVK","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:d79781f5349282aa999a066266475ee7af8b479a55af24d3c6d7c00e4a5167b3","target":"graph","created_at":"2026-05-18T00:46:28Z","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 results of a pilot near-infrared (NIR) spectroscopic campaign of five very massive galaxies ($\\log(\\text{M}_\\star/\\text{M}_\\odot)>11.45$) in the range of $1.7<z<2.7$. We measure an absorption feature redshift for one galaxy at $z_\\text{spec}=2.000\\pm0.006$. For the remaining galaxies, we combine the photometry with the continuum from the spectra to estimate continuum redshifts and stellar population properties. We define a continuum redshift ($z_{\\rm cont}$ ) as one in which the redshift is estimated probabilistically using EAZY from the combination of catalog photometry and the","authors_text":"Adam Muzzin, Britt Lundgren, Danilo Marchesini, David Wake, Erin Kado-Fong, Gabriel Brammer, Gregory Rudnick, Ivo Labb\\'e, Katherine Whitaker, Mauro Stefanon, Pieter van Dokkum, Rachel Bezanson, Rik Williams, Ryan Quadri, Tomer Tal, Z. Cemile Marsan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-14T19:00:00Z","title":"Near-infrared spectroscopy of 5 ultra-massive galaxies at 1.7 < z < 2.7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04352","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":"sha256:20e6635b2829e957023d76019464c132a1beda847a6d888ee53e0fd9a5a726b2","target":"record","created_at":"2026-05-18T00:46:28Z","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":"75d9fd945acaa164b4288608b58cb81cd55fef79b0d29e8f8ac1e07420146e8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-14T19:00:00Z","title_canon_sha256":"7b6c2de89cac1729ff1ec5444afa969136dea63804dc3574562f9a919a81bf44"},"schema_version":"1.0","source":{"id":"1702.04352","kind":"arxiv","version":1}},"canonical_sha256":"f7cf0f92aa2f802567fade549415e5b90009e0f662f7323743fa54e194f37d7c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7cf0f92aa2f802567fade549415e5b90009e0f662f7323743fa54e194f37d7c","first_computed_at":"2026-05-18T00:46:28.990346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:28.990346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M0Lno5BnPMuNL5LDN1KDp2MH6SQkWyzHNsSsETeBvwvjmVZkwxwtWxwiwrMcMHd1frdQlqCfyx6IpFNXU5i6AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:28.990934Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.04352","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:20e6635b2829e957023d76019464c132a1beda847a6d888ee53e0fd9a5a726b2","sha256:d79781f5349282aa999a066266475ee7af8b479a55af24d3c6d7c00e4a5167b3"],"state_sha256":"61e6ca73a7e9dc1a86076dcc813d47fa61b5a3cc58464650a1dd84c954df415a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9YTOjdRj8JkX7lpSfsOIwTWhZGRqQzzMoWua1K9PvGVJRyrcbrju2K9D1EKhS2tsA2U4mazBE3oIrsyABVeIDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T15:04:21.366898Z","bundle_sha256":"9c010e6d8c2930b44e6a9c265af515b90e476fa024044b7f0bae394a52ca2500"}}