{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:4H46QDJVDMETZ3R3R4U66UFAWA","short_pith_number":"pith:4H46QDJV","schema_version":"1.0","canonical_sha256":"e1f9e80d351b093cee3b8f29ef50a0b02b5ee210c1c09eb68822a524424df237","source":{"kind":"arxiv","id":"0901.1237","version":1},"attestation_state":"computed","paper":{"title":"Star formation history in the SMC: the case of NGC602","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"2), (2) INAF, (3) Space Telescope Science Institute, 4, 4), (4) European Space Agency, (5) Dipartimento di Fisica ``Enrico Fermi'', 6), (6) INFN - Sezione di Pisa, (7) Department of Physics, (8) University of Wisconsin, 9) ((1) Dipartimento di Astronomia, (9) Department of Physics, A. Nota (3, Astronomy, Baltimore, E. Sabbi (3, Italy, J. Gallagher (8), Johns Hopkins University, L. Angeretti (2), largo Pontecorvo 3, L.J. Smith (3, Lynn Redding Carlson (7), Madison, M. Cignoni (1, M. Meixner (3), M. Sirianni (3, M. Tosi (2), Osservatorio Astronomico di Bologna, P.G. Prada Moroni (5, Pisa, Research, Scientific Support Department, S. Degl'Innocenti (5, UK), Universita' degli Studi di Bologna, Universita' di Pisa, University College London, USA, WI","submitted_at":"2009-01-09T13:49:03Z","abstract_excerpt":"Deep HST/ACS photometry of the young cluster NGC 602, located in the remote low density \"wing\" of the Small Magellanic Cloud, reveals numerous pre-main sequence stars as well as young stars on the main sequence. The resolved stellar content thus provides a basis for studying the star formation history into recent times and constraining several stellar population properties, such as the present day mass function, the initial mass function and the binary fraction. To better characterize the pre-main sequence population, we present a new set of model stellar evolutionary tracks for this evolution"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0901.1237","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-09T13:49:03Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9464c1a562464ac47359af765ec7bbe7446707a44563172d6fe5ec2add5ab915","abstract_canon_sha256":"ece28d33a80b831e4bd2e73932d4ca3025baed59e041dc1076c010643d717898"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:53.589470Z","signature_b64":"S/5RyzV+OiehpbJ5nEBQt5miGPpAJIOimuLtRYYoOAtQQ6gOcC23zk7TTs6U5WYJL4KRNnohc2HcsK0+VpyKAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e1f9e80d351b093cee3b8f29ef50a0b02b5ee210c1c09eb68822a524424df237","last_reissued_at":"2026-05-18T04:32:53.588997Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:53.588997Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Star formation history in the SMC: the case of NGC602","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"2), (2) INAF, (3) Space Telescope Science Institute, 4, 4), (4) European Space Agency, (5) Dipartimento di Fisica ``Enrico Fermi'', 6), (6) INFN - Sezione di Pisa, (7) Department of Physics, (8) University of Wisconsin, 9) ((1) Dipartimento di Astronomia, (9) Department of Physics, A. Nota (3, Astronomy, Baltimore, E. Sabbi (3, Italy, J. Gallagher (8), Johns Hopkins University, L. Angeretti (2), largo Pontecorvo 3, L.J. Smith (3, Lynn Redding Carlson (7), Madison, M. Cignoni (1, M. Meixner (3), M. Sirianni (3, M. Tosi (2), Osservatorio Astronomico di Bologna, P.G. Prada Moroni (5, Pisa, Research, Scientific Support Department, S. Degl'Innocenti (5, UK), Universita' degli Studi di Bologna, Universita' di Pisa, University College London, USA, WI","submitted_at":"2009-01-09T13:49:03Z","abstract_excerpt":"Deep HST/ACS photometry of the young cluster NGC 602, located in the remote low density \"wing\" of the Small Magellanic Cloud, reveals numerous pre-main sequence stars as well as young stars on the main sequence. The resolved stellar content thus provides a basis for studying the star formation history into recent times and constraining several stellar population properties, such as the present day mass function, the initial mass function and the binary fraction. To better characterize the pre-main sequence population, we present a new set of model stellar evolutionary tracks for this evolution"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.1237","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0901.1237","created_at":"2026-05-18T04:32:53.589074+00:00"},{"alias_kind":"arxiv_version","alias_value":"0901.1237v1","created_at":"2026-05-18T04:32:53.589074+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.1237","created_at":"2026-05-18T04:32:53.589074+00:00"},{"alias_kind":"pith_short_12","alias_value":"4H46QDJVDMET","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"4H46QDJVDMETZ3R3","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"4H46QDJV","created_at":"2026-05-18T12:25:58.837520+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA","json":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA.json","graph_json":"https://pith.science/api/pith-number/4H46QDJVDMETZ3R3R4U66UFAWA/graph.json","events_json":"https://pith.science/api/pith-number/4H46QDJVDMETZ3R3R4U66UFAWA/events.json","paper":"https://pith.science/paper/4H46QDJV"},"agent_actions":{"view_html":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA","download_json":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA.json","view_paper":"https://pith.science/paper/4H46QDJV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0901.1237&json=true","fetch_graph":"https://pith.science/api/pith-number/4H46QDJVDMETZ3R3R4U66UFAWA/graph.json","fetch_events":"https://pith.science/api/pith-number/4H46QDJVDMETZ3R3R4U66UFAWA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA/action/storage_attestation","attest_author":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA/action/author_attestation","sign_citation":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA/action/citation_signature","submit_replication":"https://pith.science/pith/4H46QDJVDMETZ3R3R4U66UFAWA/action/replication_record"}},"created_at":"2026-05-18T04:32:53.589074+00:00","updated_at":"2026-05-18T04:32:53.589074+00:00"}