{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:72HB3ZPJCPZLDM7X6QSNV5AZCA","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":"5bf350b3b4dd730334696d1046f83de375cdf217bd5a747b984426ced6994428","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-04T11:00:19Z","title_canon_sha256":"6d23f3cf200ab88fa9c79c5883dcae572d434f94e62cb65f8a49a86e844f902f"},"schema_version":"1.0","source":{"id":"1705.01794","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.01794","created_at":"2026-05-18T00:45:02Z"},{"alias_kind":"arxiv_version","alias_value":"1705.01794v1","created_at":"2026-05-18T00:45:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.01794","created_at":"2026-05-18T00:45:02Z"},{"alias_kind":"pith_short_12","alias_value":"72HB3ZPJCPZL","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"72HB3ZPJCPZLDM7X","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"72HB3ZPJ","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:c7c445662ad57a5f431bd13f80f6e134c504df28dc0b0f6c99c0f159d9ec9402","target":"graph","created_at":"2026-05-18T00:45:02Z","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 shock L1157-B1 driven by the low-mass protostar L1157-mm is an unique environment to investigate the chemical enrichment due to molecules released from dust grains. IRAM-30m and Plateau de Bure Interferometer observations allow a census of Si-bearing molecules in L1157-B1. We detect SiO and its isotopologues and, for the first time in a shock, SiS. The strong gradient of the [SiO/SiS] abundance ratio across the shock (from >=180 to ~25) points to a different chemical origin of the two species. SiO peaks where the jet impacts the cavity walls ([SiO/H2] ~ 1e-6), indicating that SiO is direct","authors_text":"A. Gusdorf, B. Lefloch, C. Ceccarelli, C. Codella, F. Fontani, J. Cernicharo, L. Podio, M. Benedettini, M. Rosi, N. Balucani, N. Faginas-Lago, R. Bachiller","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-04T11:00:19Z","title":"Silicon-bearing molecules in the shock L1157-B1: first detection of SiS around a Sun-like protostar"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.01794","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":"sha256:79ed320cf7031d5ce5fa963d62640059ba1fed4805fa6a4245f348fcd6a5eb13","target":"record","created_at":"2026-05-18T00:45:02Z","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":"5bf350b3b4dd730334696d1046f83de375cdf217bd5a747b984426ced6994428","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-04T11:00:19Z","title_canon_sha256":"6d23f3cf200ab88fa9c79c5883dcae572d434f94e62cb65f8a49a86e844f902f"},"schema_version":"1.0","source":{"id":"1705.01794","kind":"arxiv","version":1}},"canonical_sha256":"fe8e1de5e913f2b1b3f7f424daf41910123bc888266870d7ac0480da92043740","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe8e1de5e913f2b1b3f7f424daf41910123bc888266870d7ac0480da92043740","first_computed_at":"2026-05-18T00:45:02.283987Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:02.283987Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tC+G2HKipnDaqaHm7PH+yxZUhZVOASEVnYOulJ4xHFNHmekBmZF1Xqyvc3DjreWCnC8T9NLpqgWM5gxNJUycAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:02.284585Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.01794","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79ed320cf7031d5ce5fa963d62640059ba1fed4805fa6a4245f348fcd6a5eb13","sha256:c7c445662ad57a5f431bd13f80f6e134c504df28dc0b0f6c99c0f159d9ec9402"],"state_sha256":"c109a42b8af8ead4d6cbff78d6d658a12fc9bbe0d1b61865a8d2adb74d4da6f7"}