{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:OWPNUXB5ZJQWYOZVX6Q2JD74Y7","short_pith_number":"pith:OWPNUXB5","canonical_record":{"source":{"id":"1605.02405","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-09T02:55:27Z","cross_cats_sorted":[],"title_canon_sha256":"ce4856c7af1539f2e971e24086c9755b7db9911bf6cf8226f1c011e33f0c0b65","abstract_canon_sha256":"7c1821bb7c3ad85cb6f4cf92fba532fca9cdb7277bf63aff6c9b61ff83792d49"},"schema_version":"1.0"},"canonical_sha256":"759eda5c3dca616c3b35bfa1a48ffcc7c7d378541b426cfc67e32c6c30cb8d8a","source":{"kind":"arxiv","id":"1605.02405","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.02405","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"1605.02405v1","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.02405","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"OWPNUXB5ZJQW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OWPNUXB5ZJQWYOZV","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OWPNUXB5","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:OWPNUXB5ZJQWYOZVX6Q2JD74Y7","target":"record","payload":{"canonical_record":{"source":{"id":"1605.02405","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-09T02:55:27Z","cross_cats_sorted":[],"title_canon_sha256":"ce4856c7af1539f2e971e24086c9755b7db9911bf6cf8226f1c011e33f0c0b65","abstract_canon_sha256":"7c1821bb7c3ad85cb6f4cf92fba532fca9cdb7277bf63aff6c9b61ff83792d49"},"schema_version":"1.0"},"canonical_sha256":"759eda5c3dca616c3b35bfa1a48ffcc7c7d378541b426cfc67e32c6c30cb8d8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:47.049431Z","signature_b64":"DzBH20Wz7M29QDs3lk2ZZ6HALG0UzwIV/2ZUiSMACKRlSVYcSwgeVygGqKIIDPWw8hC7FVw5fe9Dfxqjvfn9DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"759eda5c3dca616c3b35bfa1a48ffcc7c7d378541b426cfc67e32c6c30cb8d8a","last_reissued_at":"2026-05-18T01:13:47.048707Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:47.048707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.02405","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":"2026-05-18T01:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uw2vzo6NMgl3KtpH5yD2d1g3fSt4HfYC8JJ5wtSJbAth1anp/Tdue771TFTu/ltdTgRbKdsemaoLhQ6JnF3OAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:47:46.410220Z"},"content_sha256":"c06d1234a25273d4b1673080b0b5bfdc5fbac8668d4a6cbdf3af61dad8b2109e","schema_version":"1.0","event_id":"sha256:c06d1234a25273d4b1673080b0b5bfdc5fbac8668d4a6cbdf3af61dad8b2109e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:OWPNUXB5ZJQWYOZVX6Q2JD74Y7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-end mass function of the Quintuplet cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jihye Shin, Sungsoo S. Kim","submitted_at":"2016-05-09T02:55:27Z","abstract_excerpt":"The Quintuplet and Arches clusters, which were formed in the harsh environment of the Galactic Center (GC) a few million years ago, have been excellent targets for studying the effects of a star-forming environment on the initial mass function (IMF). In order to estimate the shape of the low-end IMF of the Arches cluster, Shin & Kim devised a novel photometric method that utilizes pixel intensity histograms (PIHs) of the observed images. Here, we apply the PIH method to the Quintuplet cluster and estimate the shape of its low-end IMF below the magnitude of completeness limit as set by conventi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.02405","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":"2026-05-18T01:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Byg4S0tyvK7tmksjwZPJ6NqDZrcI8PC+zLkTgAzaAFzDpe8hoT2H1D1BBAx/Dvzn0lA+OESbhWPS4jLAW91xBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:47:46.410593Z"},"content_sha256":"30e6d9efb41a11a0af99bff7f2ab30d638354fb2edd42d6f10734ad8d213f24f","schema_version":"1.0","event_id":"sha256:30e6d9efb41a11a0af99bff7f2ab30d638354fb2edd42d6f10734ad8d213f24f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/bundle.json","state_url":"https://pith.science/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/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":"2026-06-09T00:47:46Z","links":{"resolver":"https://pith.science/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7","bundle":"https://pith.science/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/bundle.json","state":"https://pith.science/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OWPNUXB5ZJQWYOZVX6Q2JD74Y7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:OWPNUXB5ZJQWYOZVX6Q2JD74Y7","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":"7c1821bb7c3ad85cb6f4cf92fba532fca9cdb7277bf63aff6c9b61ff83792d49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-09T02:55:27Z","title_canon_sha256":"ce4856c7af1539f2e971e24086c9755b7db9911bf6cf8226f1c011e33f0c0b65"},"schema_version":"1.0","source":{"id":"1605.02405","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.02405","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"1605.02405v1","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.02405","created_at":"2026-05-18T01:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"OWPNUXB5ZJQW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OWPNUXB5ZJQWYOZV","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OWPNUXB5","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:30e6d9efb41a11a0af99bff7f2ab30d638354fb2edd42d6f10734ad8d213f24f","target":"graph","created_at":"2026-05-18T01:13:47Z","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":"The Quintuplet and Arches clusters, which were formed in the harsh environment of the Galactic Center (GC) a few million years ago, have been excellent targets for studying the effects of a star-forming environment on the initial mass function (IMF). In order to estimate the shape of the low-end IMF of the Arches cluster, Shin & Kim devised a novel photometric method that utilizes pixel intensity histograms (PIHs) of the observed images. Here, we apply the PIH method to the Quintuplet cluster and estimate the shape of its low-end IMF below the magnitude of completeness limit as set by conventi","authors_text":"Jihye Shin, Sungsoo S. Kim","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-09T02:55:27Z","title":"Low-end mass function of the Quintuplet cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.02405","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:c06d1234a25273d4b1673080b0b5bfdc5fbac8668d4a6cbdf3af61dad8b2109e","target":"record","created_at":"2026-05-18T01:13:47Z","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":"7c1821bb7c3ad85cb6f4cf92fba532fca9cdb7277bf63aff6c9b61ff83792d49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-09T02:55:27Z","title_canon_sha256":"ce4856c7af1539f2e971e24086c9755b7db9911bf6cf8226f1c011e33f0c0b65"},"schema_version":"1.0","source":{"id":"1605.02405","kind":"arxiv","version":1}},"canonical_sha256":"759eda5c3dca616c3b35bfa1a48ffcc7c7d378541b426cfc67e32c6c30cb8d8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"759eda5c3dca616c3b35bfa1a48ffcc7c7d378541b426cfc67e32c6c30cb8d8a","first_computed_at":"2026-05-18T01:13:47.048707Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:47.048707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DzBH20Wz7M29QDs3lk2ZZ6HALG0UzwIV/2ZUiSMACKRlSVYcSwgeVygGqKIIDPWw8hC7FVw5fe9Dfxqjvfn9DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:47.049431Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.02405","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c06d1234a25273d4b1673080b0b5bfdc5fbac8668d4a6cbdf3af61dad8b2109e","sha256:30e6d9efb41a11a0af99bff7f2ab30d638354fb2edd42d6f10734ad8d213f24f"],"state_sha256":"3169d3abe7bbc1920ad3a5c2005b4809276c5c22e7e44bd4f3f0cd142b5631dd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7+Lq7RxI7egF+KHPYaNKVXgb0RORQQnuEXXnOHtKPv9FLjExPMYRKIyH0/ruli52yk1tR3BCYhM4RGW2tQlzAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T00:47:46.412449Z","bundle_sha256":"583c54c4decf204d9cba210893d6c74f438060ab31e3be2f824287f70f13a437"}}