{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VL4WPKHZV3NB7SYU4EYGNEHWPO","short_pith_number":"pith:VL4WPKHZ","canonical_record":{"source":{"id":"1208.0466","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-02T12:24:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"96970d62161c91cba20af88c3a943162624a3461c89f2eb894854757b3eb3063","abstract_canon_sha256":"15ed33b89b797d801f45fa24c95d2e027877a79ea654a011d8c7060f43ba29cc"},"schema_version":"1.0"},"canonical_sha256":"aaf967a8f9aeda1fcb14e1306690f67ba80e8772cf7926f523b2b55525144928","source":{"kind":"arxiv","id":"1208.0466","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0466","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0466v1","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0466","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"VL4WPKHZV3NB","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VL4WPKHZV3NB7SYU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VL4WPKHZ","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VL4WPKHZV3NB7SYU4EYGNEHWPO","target":"record","payload":{"canonical_record":{"source":{"id":"1208.0466","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-02T12:24:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"96970d62161c91cba20af88c3a943162624a3461c89f2eb894854757b3eb3063","abstract_canon_sha256":"15ed33b89b797d801f45fa24c95d2e027877a79ea654a011d8c7060f43ba29cc"},"schema_version":"1.0"},"canonical_sha256":"aaf967a8f9aeda1fcb14e1306690f67ba80e8772cf7926f523b2b55525144928","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:23.853813Z","signature_b64":"BZG+xhdYKCHQTZQd/1c2EK7LodXZww9G1xiMufHE7vSMyPlmzCF8jg5OpUupo0QjrfCcmH3STwpUfAZwdtO5AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aaf967a8f9aeda1fcb14e1306690f67ba80e8772cf7926f523b2b55525144928","last_reissued_at":"2026-05-18T01:55:23.853162Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:23.853162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.0466","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":"2026-05-18T01:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CwQMZNlVFw2cmOrPlyv2RGAnbpK5+hgaA6wHc70t7Dha1nfhrX0ewrqjrAcDsU9EGK4RNYDbhUjUEBuwUVqCAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T12:11:18.927093Z"},"content_sha256":"f820e61cfa9340c28a1c78a4b2620438beb215267972f15fac12e378e1d536ce","schema_version":"1.0","event_id":"sha256:f820e61cfa9340c28a1c78a4b2620438beb215267972f15fac12e378e1d536ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VL4WPKHZV3NB7SYU4EYGNEHWPO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Astrometric and photometric initial mass functions from the UKIDSS Galactic Clusters Survey: III Praesepe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"2), (2) Universidad de La Laguna, (3) Max-Planck-Institute fur Astronomie, (4) University of Edinburgh), N. C. Hambly (4) ((1) Instituto de Astrofisica de Canarias, N. Lodieu (1, N. R. Deacon (3), S. Boudreault (1","submitted_at":"2012-08-02T12:24:57Z","abstract_excerpt":"Over the past decades open clusters have been the subject of many studies. Such studies are crucial considering that the universality of the Initial Mass Function is still a subject of current investigations. Praesepe is an interesting open cluster for the study of the stellar and substellar mass function (MF), considering its intermediate age and its nearby distance. Here we present the results of a wide field, near-infrared study of Praesepe using the Data Release 9 (DR9) of the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS). We obtained cluster candidates of Praesepe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0466","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":"2026-05-18T01:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z6ZvoKSBKgSovGhI2geG1ieGiEljVq+xX7wzLl2valOJoYxIxvDZvnFV75pC51x9J7b4H0AfmPHeOhOOBOyEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T12:11:18.927461Z"},"content_sha256":"6e97fbdfcdc0b95bf46d62b0f181e32d5b599d8b2257100f1223b4f28d01edb9","schema_version":"1.0","event_id":"sha256:6e97fbdfcdc0b95bf46d62b0f181e32d5b599d8b2257100f1223b4f28d01edb9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/bundle.json","state_url":"https://pith.science/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/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":"2026-05-22T12:11:18Z","links":{"resolver":"https://pith.science/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO","bundle":"https://pith.science/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/bundle.json","state":"https://pith.science/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VL4WPKHZV3NB7SYU4EYGNEHWPO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VL4WPKHZV3NB7SYU4EYGNEHWPO","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":"15ed33b89b797d801f45fa24c95d2e027877a79ea654a011d8c7060f43ba29cc","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-02T12:24:57Z","title_canon_sha256":"96970d62161c91cba20af88c3a943162624a3461c89f2eb894854757b3eb3063"},"schema_version":"1.0","source":{"id":"1208.0466","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0466","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0466v1","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0466","created_at":"2026-05-18T01:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"VL4WPKHZV3NB","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VL4WPKHZV3NB7SYU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VL4WPKHZ","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:6e97fbdfcdc0b95bf46d62b0f181e32d5b599d8b2257100f1223b4f28d01edb9","target":"graph","created_at":"2026-05-18T01:55:23Z","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":"Over the past decades open clusters have been the subject of many studies. Such studies are crucial considering that the universality of the Initial Mass Function is still a subject of current investigations. Praesepe is an interesting open cluster for the study of the stellar and substellar mass function (MF), considering its intermediate age and its nearby distance. Here we present the results of a wide field, near-infrared study of Praesepe using the Data Release 9 (DR9) of the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS). We obtained cluster candidates of Praesepe","authors_text":"2), (2) Universidad de La Laguna, (3) Max-Planck-Institute fur Astronomie, (4) University of Edinburgh), N. C. Hambly (4) ((1) Instituto de Astrofisica de Canarias, N. Lodieu (1, N. R. Deacon (3), S. Boudreault (1","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-02T12:24:57Z","title":"Astrometric and photometric initial mass functions from the UKIDSS Galactic Clusters Survey: III Praesepe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0466","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:f820e61cfa9340c28a1c78a4b2620438beb215267972f15fac12e378e1d536ce","target":"record","created_at":"2026-05-18T01:55:23Z","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":"15ed33b89b797d801f45fa24c95d2e027877a79ea654a011d8c7060f43ba29cc","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-02T12:24:57Z","title_canon_sha256":"96970d62161c91cba20af88c3a943162624a3461c89f2eb894854757b3eb3063"},"schema_version":"1.0","source":{"id":"1208.0466","kind":"arxiv","version":1}},"canonical_sha256":"aaf967a8f9aeda1fcb14e1306690f67ba80e8772cf7926f523b2b55525144928","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aaf967a8f9aeda1fcb14e1306690f67ba80e8772cf7926f523b2b55525144928","first_computed_at":"2026-05-18T01:55:23.853162Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:23.853162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BZG+xhdYKCHQTZQd/1c2EK7LodXZww9G1xiMufHE7vSMyPlmzCF8jg5OpUupo0QjrfCcmH3STwpUfAZwdtO5AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:23.853813Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.0466","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f820e61cfa9340c28a1c78a4b2620438beb215267972f15fac12e378e1d536ce","sha256:6e97fbdfcdc0b95bf46d62b0f181e32d5b599d8b2257100f1223b4f28d01edb9"],"state_sha256":"1da431ec21cc08ad07fbbcb5f1f5727afc0e25c106d7519ac7d144cbbdd8962c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W0kdI73Wu4+MSiICbgqgTnrL8Amyou4A+DoszLZUVWOU6aqFxv6P+jL57f96j0wohQ79FPZ0GEzJj8jDmNTaCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T12:11:18.929690Z","bundle_sha256":"ddef4d8bfdb31fbae51adfaab047eb5e6b335ed5f8f0e374e333c7d9034ee0ff"}}