{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:SM2YWF5B6AE4FQZO362VD5VYJO","short_pith_number":"pith:SM2YWF5B","schema_version":"1.0","canonical_sha256":"93358b17a1f009c2c32edfb551f6b84b85876b62b7b9f5b5c9a0f72b9a76a7bd","source":{"kind":"arxiv","id":"2006.02676","version":1},"attestation_state":"computed","paper":{"title":"Evidence for magnetic activity at starbirth: a powerful X-ray flare from the Class 0 protostar HOPS 383","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"David Principe, GSFC), Joel Kastner (Center for Imaging Science, Kenji Hamaguchi (CRESST, Nicolas Grosso (LAM), RIT)","submitted_at":"2020-06-04T07:45:58Z","abstract_excerpt":"Context. Class 0 protostars represent the earliest evolutionary stage of solar-type stars, during which the majority of the system mass resides in an infalling envelope of gas and dust and is not yet in the central, nascent star. Although X-rays are a key signature of magnetic activity in more evolved protostars and young stars, whether such magnetic activity is present at the Class 0 stage is still debated. Aims. We aim to detect a bona fide Class 0 protostar in X-rays. Methods. We observed HOPS 383 in 2017 December in X-rays with the Chandra X-ray Observatory ($\\sim$84 ks) and in near-infrar"},"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":"2006.02676","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-06-04T07:45:58Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"51ba6cb62e55490930ccb75a124fb48fe2d6830fb67eadbed843feb3a4b544f5","abstract_canon_sha256":"fb7332cd19e1ee6f5546f8206b9831d4cd0211b5b621d66dc0ef1f1a442a5d96"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:12:48.238031Z","signature_b64":"B+dimq28OKvUq6fO7fuVRH/vAqmL7NhfxxfkkBi4ULu7Qt6aoAEgnwEPqAAOs4WG1eacCzkcNOsgcGi4EmZ8DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"93358b17a1f009c2c32edfb551f6b84b85876b62b7b9f5b5c9a0f72b9a76a7bd","last_reissued_at":"2026-07-05T01:12:48.237575Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:12:48.237575Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for magnetic activity at starbirth: a powerful X-ray flare from the Class 0 protostar HOPS 383","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"David Principe, GSFC), Joel Kastner (Center for Imaging Science, Kenji Hamaguchi (CRESST, Nicolas Grosso (LAM), RIT)","submitted_at":"2020-06-04T07:45:58Z","abstract_excerpt":"Context. Class 0 protostars represent the earliest evolutionary stage of solar-type stars, during which the majority of the system mass resides in an infalling envelope of gas and dust and is not yet in the central, nascent star. Although X-rays are a key signature of magnetic activity in more evolved protostars and young stars, whether such magnetic activity is present at the Class 0 stage is still debated. Aims. We aim to detect a bona fide Class 0 protostar in X-rays. Methods. We observed HOPS 383 in 2017 December in X-rays with the Chandra X-ray Observatory ($\\sim$84 ks) and in near-infrar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.02676","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.02676/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2006.02676","created_at":"2026-07-05T01:12:48.237631+00:00"},{"alias_kind":"arxiv_version","alias_value":"2006.02676v1","created_at":"2026-07-05T01:12:48.237631+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.02676","created_at":"2026-07-05T01:12:48.237631+00:00"},{"alias_kind":"pith_short_12","alias_value":"SM2YWF5B6AE4","created_at":"2026-07-05T01:12:48.237631+00:00"},{"alias_kind":"pith_short_16","alias_value":"SM2YWF5B6AE4FQZO","created_at":"2026-07-05T01:12:48.237631+00:00"},{"alias_kind":"pith_short_8","alias_value":"SM2YWF5B","created_at":"2026-07-05T01:12:48.237631+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/SM2YWF5B6AE4FQZO362VD5VYJO","json":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO.json","graph_json":"https://pith.science/api/pith-number/SM2YWF5B6AE4FQZO362VD5VYJO/graph.json","events_json":"https://pith.science/api/pith-number/SM2YWF5B6AE4FQZO362VD5VYJO/events.json","paper":"https://pith.science/paper/SM2YWF5B"},"agent_actions":{"view_html":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO","download_json":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO.json","view_paper":"https://pith.science/paper/SM2YWF5B","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2006.02676&json=true","fetch_graph":"https://pith.science/api/pith-number/SM2YWF5B6AE4FQZO362VD5VYJO/graph.json","fetch_events":"https://pith.science/api/pith-number/SM2YWF5B6AE4FQZO362VD5VYJO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO/action/storage_attestation","attest_author":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO/action/author_attestation","sign_citation":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO/action/citation_signature","submit_replication":"https://pith.science/pith/SM2YWF5B6AE4FQZO362VD5VYJO/action/replication_record"}},"created_at":"2026-07-05T01:12:48.237631+00:00","updated_at":"2026-07-05T01:12:48.237631+00:00"}