{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:WGEJ7DTTW3JE7UY7RZLHYUVYL6","short_pith_number":"pith:WGEJ7DTT","canonical_record":{"source":{"id":"1410.4506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T17:31:49Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c1c9ce0654f84891580a295a169394fcdccc3fd9458bc349d7c97a93d19db07","abstract_canon_sha256":"0b354755d2a7b5587ed4039baaeeccf530c2b6dbb2276e5df2ae2a648a6453ac"},"schema_version":"1.0"},"canonical_sha256":"b1889f8e73b6d24fd31f8e567c52b85fb5bb5b08170e856ca30998eace9df259","source":{"kind":"arxiv","id":"1410.4506","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.4506","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"arxiv_version","alias_value":"1410.4506v1","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.4506","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"pith_short_12","alias_value":"WGEJ7DTTW3JE","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WGEJ7DTTW3JE7UY7","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WGEJ7DTT","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:WGEJ7DTTW3JE7UY7RZLHYUVYL6","target":"record","payload":{"canonical_record":{"source":{"id":"1410.4506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T17:31:49Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c1c9ce0654f84891580a295a169394fcdccc3fd9458bc349d7c97a93d19db07","abstract_canon_sha256":"0b354755d2a7b5587ed4039baaeeccf530c2b6dbb2276e5df2ae2a648a6453ac"},"schema_version":"1.0"},"canonical_sha256":"b1889f8e73b6d24fd31f8e567c52b85fb5bb5b08170e856ca30998eace9df259","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:39:56.029686Z","signature_b64":"In8IUSOXwhkKOAnAhGRbxvwBEfZndTclIfWtYbma64Nvoteu7fBNFJQm4a4iE4nuGExih/xhJ/nxYD5DqXYqAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1889f8e73b6d24fd31f8e567c52b85fb5bb5b08170e856ca30998eace9df259","last_reissued_at":"2026-05-18T02:39:56.029289Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:39:56.029289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.4506","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":"2026-05-18T02:39:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3/8WX9pYXm/bdDtqdugGFOWPgTsqghICe0N1TxYriUQpk/XUQ6xPMbuuZlpWQhQFEHAkLV3w6pBHAiBDKbaXBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:38:44.182005Z"},"content_sha256":"b00e3a74e4c621c8e247f77a777544140ca7246c390731f2648c8ab0adae315b","schema_version":"1.0","event_id":"sha256:b00e3a74e4c621c8e247f77a777544140ca7246c390731f2648c8ab0adae315b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:WGEJ7DTTW3JE7UY7RZLHYUVYL6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic Needs for Calibration of LSST Photometric Redshifts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Alexandra Abate, Jeffrey A. Newman, Samuel J. Schmidt, the Spectroscopic Needs White Paper team","submitted_at":"2014-10-16T17:31:49Z","abstract_excerpt":"This white paper summarizes the conclusions of the Snowmass White Paper \"Spectroscopic Needs for Imaging Dark Energy Experiments\" (arXiv:1309.5384) which are relevant to the calibration of LSST photometric redshifts; i.e., the accurate characterization of biases and uncertainties in photo-z's. Any significant miscalibration will lead to systematic errors in photo-z's, impacting nearly all extragalactic science with LSST. As existing deep redshift samples have failed to yield highly-secure redshifts for a systematic 20%-60% of their targets, it is a strong possibility that future deep spectrosc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.4506","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":"2026-05-18T02:39:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N/iY2yXFfvmlWthAC+U1TGxaF1c88FgbF9dw+e95zZ+JvPmd+QM4/k/JBJsXeEOUYzZ+1sZaMpZT9IRHNt7pDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T17:38:44.182703Z"},"content_sha256":"1dbc9ab431964e55ed9ffb08af158b04256b01dec279f7bdfdb70c29c4e0b6a2","schema_version":"1.0","event_id":"sha256:1dbc9ab431964e55ed9ffb08af158b04256b01dec279f7bdfdb70c29c4e0b6a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/bundle.json","state_url":"https://pith.science/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/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":"2026-06-07T17:38:44Z","links":{"resolver":"https://pith.science/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6","bundle":"https://pith.science/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/bundle.json","state":"https://pith.science/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WGEJ7DTTW3JE7UY7RZLHYUVYL6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:WGEJ7DTTW3JE7UY7RZLHYUVYL6","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":"0b354755d2a7b5587ed4039baaeeccf530c2b6dbb2276e5df2ae2a648a6453ac","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T17:31:49Z","title_canon_sha256":"6c1c9ce0654f84891580a295a169394fcdccc3fd9458bc349d7c97a93d19db07"},"schema_version":"1.0","source":{"id":"1410.4506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.4506","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"arxiv_version","alias_value":"1410.4506v1","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.4506","created_at":"2026-05-18T02:39:56Z"},{"alias_kind":"pith_short_12","alias_value":"WGEJ7DTTW3JE","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WGEJ7DTTW3JE7UY7","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WGEJ7DTT","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:1dbc9ab431964e55ed9ffb08af158b04256b01dec279f7bdfdb70c29c4e0b6a2","target":"graph","created_at":"2026-05-18T02:39:56Z","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":"This white paper summarizes the conclusions of the Snowmass White Paper \"Spectroscopic Needs for Imaging Dark Energy Experiments\" (arXiv:1309.5384) which are relevant to the calibration of LSST photometric redshifts; i.e., the accurate characterization of biases and uncertainties in photo-z's. Any significant miscalibration will lead to systematic errors in photo-z's, impacting nearly all extragalactic science with LSST. As existing deep redshift samples have failed to yield highly-secure redshifts for a systematic 20%-60% of their targets, it is a strong possibility that future deep spectrosc","authors_text":"Alexandra Abate, Jeffrey A. Newman, Samuel J. Schmidt, the Spectroscopic Needs White Paper team","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T17:31:49Z","title":"Spectroscopic Needs for Calibration of LSST Photometric Redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.4506","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:b00e3a74e4c621c8e247f77a777544140ca7246c390731f2648c8ab0adae315b","target":"record","created_at":"2026-05-18T02:39:56Z","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":"0b354755d2a7b5587ed4039baaeeccf530c2b6dbb2276e5df2ae2a648a6453ac","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T17:31:49Z","title_canon_sha256":"6c1c9ce0654f84891580a295a169394fcdccc3fd9458bc349d7c97a93d19db07"},"schema_version":"1.0","source":{"id":"1410.4506","kind":"arxiv","version":1}},"canonical_sha256":"b1889f8e73b6d24fd31f8e567c52b85fb5bb5b08170e856ca30998eace9df259","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1889f8e73b6d24fd31f8e567c52b85fb5bb5b08170e856ca30998eace9df259","first_computed_at":"2026-05-18T02:39:56.029289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:39:56.029289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"In8IUSOXwhkKOAnAhGRbxvwBEfZndTclIfWtYbma64Nvoteu7fBNFJQm4a4iE4nuGExih/xhJ/nxYD5DqXYqAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:39:56.029686Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.4506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b00e3a74e4c621c8e247f77a777544140ca7246c390731f2648c8ab0adae315b","sha256:1dbc9ab431964e55ed9ffb08af158b04256b01dec279f7bdfdb70c29c4e0b6a2"],"state_sha256":"cd08dd2d7e1a010230408db87623ab24903154861bc3b911f3d5ea829bdf2c1a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XfE35nlsPQsahjYHH5vBgf87N49MdAKTcivese0ZRtLz0mYnPExkK32uQCZLK7eV5IMr57CNSFwUEF830RcqBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T17:38:44.186550Z","bundle_sha256":"b4b3865368e344da1a43c089798b7db529dc7ef450349d804ca4dcfc9bc54648"}}