{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:HUQB2WF7CLL3TGWS3NC5J7PSZ7","short_pith_number":"pith:HUQB2WF7","canonical_record":{"source":{"id":"1407.5151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T06:24:24Z","cross_cats_sorted":[],"title_canon_sha256":"df497a31003399acaf7f69edc0d2647a91936b93130a701ce440dfbcae523742","abstract_canon_sha256":"e8aa5dbf22432f0c7682abe86ea7a40418d38a1f40e5fda36737cc960c46f888"},"schema_version":"1.0"},"canonical_sha256":"3d201d58bf12d7b99ad2db45d4fdf2cfd84cadff4f360253c51ea271809eb558","source":{"kind":"arxiv","id":"1407.5151","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5151","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5151v1","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5151","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"pith_short_12","alias_value":"HUQB2WF7CLL3","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HUQB2WF7CLL3TGWS","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HUQB2WF7","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:HUQB2WF7CLL3TGWS3NC5J7PSZ7","target":"record","payload":{"canonical_record":{"source":{"id":"1407.5151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T06:24:24Z","cross_cats_sorted":[],"title_canon_sha256":"df497a31003399acaf7f69edc0d2647a91936b93130a701ce440dfbcae523742","abstract_canon_sha256":"e8aa5dbf22432f0c7682abe86ea7a40418d38a1f40e5fda36737cc960c46f888"},"schema_version":"1.0"},"canonical_sha256":"3d201d58bf12d7b99ad2db45d4fdf2cfd84cadff4f360253c51ea271809eb558","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:33.820924Z","signature_b64":"KqUXfsBdCniBuBQjUqfMR/YZSxfmO3V1ZnxIHZskFYt1xAs6tYjuNLAmvrasdG5BiuJp0GeuoKj42zL9KeDVDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d201d58bf12d7b99ad2db45d4fdf2cfd84cadff4f360253c51ea271809eb558","last_reissued_at":"2026-05-18T01:42:33.820543Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:33.820543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.5151","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":"2026-05-18T01:42:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SK1pOM0QztjDU9692hR5av7JRBEr2kCK+rfUPpjeUZx0GV1vBOgbDgktHX3s8JsIXxxqJhvvyTgBK6KAD2PKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:21:09.549186Z"},"content_sha256":"0dfd5e7aa52af407c42de1da9851e3fb0f9515bb266ceac8582ce0f057515db8","schema_version":"1.0","event_id":"sha256:0dfd5e7aa52af407c42de1da9851e3fb0f9515bb266ceac8582ce0f057515db8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:HUQB2WF7CLL3TGWS3NC5J7PSZ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimating Luminosities and Stellar Masses of Galaxies Photometrically without Determining Redshifts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. C. Hsieh, H. K. C. Yee","submitted_at":"2014-07-19T06:24:24Z","abstract_excerpt":"Large direct-imaging surveys usually use a template-fitting technique to estimate photometric redshifts for galaxies, which are then applied to derive important galaxy properties such as luminosities and stellar masses. These estimates can be noisy and suffer from systematic biases because of the possible mis-selection of templates and the propagation of the photometric redshift uncertainty. We introduce an algorithm, the Direct Empirical Photometric method (DEmP), which can be used to directly estimate these quantities using training sets, bypassing photometric redshift determination. DEmP al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5151","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":"2026-05-18T01:42:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1hg69UXNzdVwyAypVw4gOXu8MATtNUvd7OHc7HNMHYkTopAYvGOTd5JXUDu3C30e03WUCyMFKIgPyFcdoVS3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T17:21:09.549558Z"},"content_sha256":"596075e8362fa182803c755439f4f4f0ef4d75f5c1fb91579ec59a54be0e7bba","schema_version":"1.0","event_id":"sha256:596075e8362fa182803c755439f4f4f0ef4d75f5c1fb91579ec59a54be0e7bba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/bundle.json","state_url":"https://pith.science/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/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":"2026-05-18T17:21:09Z","links":{"resolver":"https://pith.science/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7","bundle":"https://pith.science/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/bundle.json","state":"https://pith.science/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HUQB2WF7CLL3TGWS3NC5J7PSZ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:HUQB2WF7CLL3TGWS3NC5J7PSZ7","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":"e8aa5dbf22432f0c7682abe86ea7a40418d38a1f40e5fda36737cc960c46f888","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T06:24:24Z","title_canon_sha256":"df497a31003399acaf7f69edc0d2647a91936b93130a701ce440dfbcae523742"},"schema_version":"1.0","source":{"id":"1407.5151","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5151","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5151v1","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5151","created_at":"2026-05-18T01:42:33Z"},{"alias_kind":"pith_short_12","alias_value":"HUQB2WF7CLL3","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HUQB2WF7CLL3TGWS","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HUQB2WF7","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:596075e8362fa182803c755439f4f4f0ef4d75f5c1fb91579ec59a54be0e7bba","target":"graph","created_at":"2026-05-18T01:42:33Z","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":"Large direct-imaging surveys usually use a template-fitting technique to estimate photometric redshifts for galaxies, which are then applied to derive important galaxy properties such as luminosities and stellar masses. These estimates can be noisy and suffer from systematic biases because of the possible mis-selection of templates and the propagation of the photometric redshift uncertainty. We introduce an algorithm, the Direct Empirical Photometric method (DEmP), which can be used to directly estimate these quantities using training sets, bypassing photometric redshift determination. DEmP al","authors_text":"B. C. Hsieh, H. K. C. Yee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T06:24:24Z","title":"Estimating Luminosities and Stellar Masses of Galaxies Photometrically without Determining Redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5151","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":"sha256:0dfd5e7aa52af407c42de1da9851e3fb0f9515bb266ceac8582ce0f057515db8","target":"record","created_at":"2026-05-18T01:42:33Z","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":"e8aa5dbf22432f0c7682abe86ea7a40418d38a1f40e5fda36737cc960c46f888","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T06:24:24Z","title_canon_sha256":"df497a31003399acaf7f69edc0d2647a91936b93130a701ce440dfbcae523742"},"schema_version":"1.0","source":{"id":"1407.5151","kind":"arxiv","version":1}},"canonical_sha256":"3d201d58bf12d7b99ad2db45d4fdf2cfd84cadff4f360253c51ea271809eb558","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d201d58bf12d7b99ad2db45d4fdf2cfd84cadff4f360253c51ea271809eb558","first_computed_at":"2026-05-18T01:42:33.820543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:33.820543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KqUXfsBdCniBuBQjUqfMR/YZSxfmO3V1ZnxIHZskFYt1xAs6tYjuNLAmvrasdG5BiuJp0GeuoKj42zL9KeDVDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:33.820924Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.5151","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dfd5e7aa52af407c42de1da9851e3fb0f9515bb266ceac8582ce0f057515db8","sha256:596075e8362fa182803c755439f4f4f0ef4d75f5c1fb91579ec59a54be0e7bba"],"state_sha256":"4936d7282d092a68b0a5ac531ea11fb0648f7ac08bcc9bcd54e0a9197a72785a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TsPpm/SyBNsv+qJWuFymWnVXt9HNnHi01AUTLUZx21JvEIWJHKj6lTARz74hhm9zPrRvy8Y3ilnUQ0uGZOP9AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T17:21:09.550997Z","bundle_sha256":"e53bb29d8681f10a362dd98e39bbaaa90692a8ca4a676fd717b3fe725b0f77ae"}}