{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:75AQBCFDUGNQUDFMRZWBPOXY6S","short_pith_number":"pith:75AQBCFD","canonical_record":{"source":{"id":"1202.3135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-14T20:55:37Z","cross_cats_sorted":[],"title_canon_sha256":"d3cfffa9e0f81f018c0f24bd1b7dd369962d82172ed9a2d3a20a860859905b79","abstract_canon_sha256":"894d8fed83d568f9d1ecaead98b0442e6bac22aa1c26cd8d1957dd49b1bd2127"},"schema_version":"1.0"},"canonical_sha256":"ff410088a3a19b0a0cac8e6c17baf8f4a6d03a7aa7cea65079dae102c35a7ce2","source":{"kind":"arxiv","id":"1202.3135","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.3135","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"1202.3135v1","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.3135","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"75AQBCFDUGNQ","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"75AQBCFDUGNQUDFM","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"75AQBCFD","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:75AQBCFDUGNQUDFMRZWBPOXY6S","target":"record","payload":{"canonical_record":{"source":{"id":"1202.3135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-14T20:55:37Z","cross_cats_sorted":[],"title_canon_sha256":"d3cfffa9e0f81f018c0f24bd1b7dd369962d82172ed9a2d3a20a860859905b79","abstract_canon_sha256":"894d8fed83d568f9d1ecaead98b0442e6bac22aa1c26cd8d1957dd49b1bd2127"},"schema_version":"1.0"},"canonical_sha256":"ff410088a3a19b0a0cac8e6c17baf8f4a6d03a7aa7cea65079dae102c35a7ce2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:28.487992Z","signature_b64":"MHgCqKjV8vkBawHKH9JKQ08ZpQAEtbrYKM3p0Missrw4Fa6LirQkrH9QR8tFcq2tXIIZxkBm2yHs6yUVgtrOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff410088a3a19b0a0cac8e6c17baf8f4a6d03a7aa7cea65079dae102c35a7ce2","last_reissued_at":"2026-05-18T01:58:28.487493Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:28.487493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.3135","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":"2026-05-18T01:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zQHhxMvffCX2V5i8aIDAle8Rwx+ILyoy7gz02ispKy7EITEJxKGxTAhHR8KqkeLUX+CbW9vRgLsGnDVprN0WAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T21:18:56.304566Z"},"content_sha256":"0346782d66ce72126a9c657fac25c18f801d3feeb0e58599f4b7f2a0db5353c4","schema_version":"1.0","event_id":"sha256:0346782d66ce72126a9c657fac25c18f801d3feeb0e58599f4b7f2a0db5353c4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:75AQBCFDUGNQUDFMRZWBPOXY6S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analysing star cluster populations with stochastic models: the HST/WFC3 sample of clusters in M83","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Ariane Lan\\c{c}on, Bradley C. Whitmore, Morgan Fouesneau, Rupali Chandar","submitted_at":"2012-02-14T20:55:37Z","abstract_excerpt":"The majority of clusters in the Universe have masses well below 10^5 Msun. Hence their integrated fluxes and colors can be affected by the random presence of a few bright stars introduced by stochastic sampling of the stellar mass function. Specific methods are being developed to extend the analysis of cluster SEDs into the low-mass regime. In this paper, we apply such a method to observations of star clusters, in the nearby spiral galaxy M83. We reassess ages and masses of a sample of 1242 objects for which UBVIHalpha fluxes were obtained with the HST/WFC3 images. Synthetic clusters with know"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.3135","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":"2026-05-18T01:58:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PUNKWiitygYRTaZPneeMuZXCctQA6YPE+kNBoZOijQYEaWFVtNurOoQwX9EJ5wBXm0zmW6vTpk/eRpq833H0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T21:18:56.305128Z"},"content_sha256":"75a296a8d0a522e6f1316236f8f4ee0072b32a278f584f5d0d85e5c045dea2f5","schema_version":"1.0","event_id":"sha256:75a296a8d0a522e6f1316236f8f4ee0072b32a278f584f5d0d85e5c045dea2f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/bundle.json","state_url":"https://pith.science/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/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":"2026-05-18T21:18:56Z","links":{"resolver":"https://pith.science/pith/75AQBCFDUGNQUDFMRZWBPOXY6S","bundle":"https://pith.science/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/bundle.json","state":"https://pith.science/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/75AQBCFDUGNQUDFMRZWBPOXY6S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:75AQBCFDUGNQUDFMRZWBPOXY6S","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":"894d8fed83d568f9d1ecaead98b0442e6bac22aa1c26cd8d1957dd49b1bd2127","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-14T20:55:37Z","title_canon_sha256":"d3cfffa9e0f81f018c0f24bd1b7dd369962d82172ed9a2d3a20a860859905b79"},"schema_version":"1.0","source":{"id":"1202.3135","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.3135","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"arxiv_version","alias_value":"1202.3135v1","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.3135","created_at":"2026-05-18T01:58:28Z"},{"alias_kind":"pith_short_12","alias_value":"75AQBCFDUGNQ","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"75AQBCFDUGNQUDFM","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"75AQBCFD","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:75a296a8d0a522e6f1316236f8f4ee0072b32a278f584f5d0d85e5c045dea2f5","target":"graph","created_at":"2026-05-18T01:58:28Z","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":"The majority of clusters in the Universe have masses well below 10^5 Msun. Hence their integrated fluxes and colors can be affected by the random presence of a few bright stars introduced by stochastic sampling of the stellar mass function. Specific methods are being developed to extend the analysis of cluster SEDs into the low-mass regime. In this paper, we apply such a method to observations of star clusters, in the nearby spiral galaxy M83. We reassess ages and masses of a sample of 1242 objects for which UBVIHalpha fluxes were obtained with the HST/WFC3 images. Synthetic clusters with know","authors_text":"Ariane Lan\\c{c}on, Bradley C. Whitmore, Morgan Fouesneau, Rupali Chandar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-14T20:55:37Z","title":"Analysing star cluster populations with stochastic models: the HST/WFC3 sample of clusters in M83"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.3135","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":"sha256:0346782d66ce72126a9c657fac25c18f801d3feeb0e58599f4b7f2a0db5353c4","target":"record","created_at":"2026-05-18T01:58:28Z","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":"894d8fed83d568f9d1ecaead98b0442e6bac22aa1c26cd8d1957dd49b1bd2127","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-14T20:55:37Z","title_canon_sha256":"d3cfffa9e0f81f018c0f24bd1b7dd369962d82172ed9a2d3a20a860859905b79"},"schema_version":"1.0","source":{"id":"1202.3135","kind":"arxiv","version":1}},"canonical_sha256":"ff410088a3a19b0a0cac8e6c17baf8f4a6d03a7aa7cea65079dae102c35a7ce2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff410088a3a19b0a0cac8e6c17baf8f4a6d03a7aa7cea65079dae102c35a7ce2","first_computed_at":"2026-05-18T01:58:28.487493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:28.487493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MHgCqKjV8vkBawHKH9JKQ08ZpQAEtbrYKM3p0Missrw4Fa6LirQkrH9QR8tFcq2tXIIZxkBm2yHs6yUVgtrOCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:28.487992Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.3135","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0346782d66ce72126a9c657fac25c18f801d3feeb0e58599f4b7f2a0db5353c4","sha256:75a296a8d0a522e6f1316236f8f4ee0072b32a278f584f5d0d85e5c045dea2f5"],"state_sha256":"12ccb109ff666a7b6f19ae91aa1847c6dc036c37a7037eff992cfb07c649f5d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oaAnbEJcXHgF40Va2WguvppU9l8ocYEUwcqZ+NUPRvuYE7Zqbcxy0+thMjypglo1TuU4dXvppJWK0zM8NiakCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T21:18:56.306933Z","bundle_sha256":"ffad5612151132d8c75038d9b3183e29fb55ee7613e6b8d06b4696b12b08c265"}}