{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AQ76GOB3GYIFCXVH6UC3KIZEBD","short_pith_number":"pith:AQ76GOB3","canonical_record":{"source":{"id":"1810.10811","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-10-25T09:52:18Z","cross_cats_sorted":[],"title_canon_sha256":"a04bfde995e6e1807b0b74f4c02553a0257e34c5f5a00ee6955624b3bd163753","abstract_canon_sha256":"fa3a12d516ca9950228a78c346a6466a775f6a890fa6f8a2923ab662ff785421"},"schema_version":"1.0"},"canonical_sha256":"043fe3383b3610515ea7f505b5232408cc58202bc12ae65bd322a065aee9023d","source":{"kind":"arxiv","id":"1810.10811","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.10811","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"arxiv_version","alias_value":"1810.10811v1","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.10811","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"pith_short_12","alias_value":"AQ76GOB3GYIF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AQ76GOB3GYIFCXVH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AQ76GOB3","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AQ76GOB3GYIFCXVH6UC3KIZEBD","target":"record","payload":{"canonical_record":{"source":{"id":"1810.10811","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-10-25T09:52:18Z","cross_cats_sorted":[],"title_canon_sha256":"a04bfde995e6e1807b0b74f4c02553a0257e34c5f5a00ee6955624b3bd163753","abstract_canon_sha256":"fa3a12d516ca9950228a78c346a6466a775f6a890fa6f8a2923ab662ff785421"},"schema_version":"1.0"},"canonical_sha256":"043fe3383b3610515ea7f505b5232408cc58202bc12ae65bd322a065aee9023d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:48.877746Z","signature_b64":"5kIPh5WigIJzs1wi8SeiBsB22dp6hyDmyrdgMwzYmzbLDhYnBNbFX8LdBgeqD/XETO+3sbI1p796lsR4PnE2Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"043fe3383b3610515ea7f505b5232408cc58202bc12ae65bd322a065aee9023d","last_reissued_at":"2026-05-17T23:59:48.877291Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:48.877291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.10811","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":"2026-05-17T23:59:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r4STT6I5yGoaERpbW+gzLSYkt1EAOUinlRsybvt14x1AiXlqq5/yNrKHCjjO/hlG/ouHt6jBmEv+o+jycjZ4Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T07:25:56.146167Z"},"content_sha256":"0c1bd0f77b7a599c1f574d933dced35ecc739278f002a68778c9bb0cd1fdaec1","schema_version":"1.0","event_id":"sha256:0c1bd0f77b7a599c1f574d933dced35ecc739278f002a68778c9bb0cd1fdaec1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AQ76GOB3GYIFCXVH6UC3KIZEBD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"O2 signature in thin and thick O2-H2O ices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"2, (2) Ural Federal University, 3), (3) Visiting Leading Researcher, A. I. Vasyunin (1, B. M. Giuliano (1), B. M\\\"uller (1), Ekaterinburg, Engineering Research Institute \"Ventspils International Radio Astronomy Centre\" of Ventspils University of Applied Sciences, Garching, Germany, Latvia), L. Bizzocchi (1), P. Caselli (1) ((1) Max-Planck-Institut fuer Extraterrestrische Physik, Russia, Ventspils","submitted_at":"2018-10-25T09:52:18Z","abstract_excerpt":"Aims. In this paper we investigate the detectability of the molecular oxygen in icy dust grain mantles towards astronomical objects. Methods. We present a systematic set of experiments with O2-H2O ice mixtures designed to disentangle how the molecular ratio affects the O2 signature in the mid- and near-infrared spectral regions. All the experiments were conducted in a closed-cycle helium cryostat coupled to a Fourier transform infrared spectrometer. The ice mixtures comprise varying thicknesses from 8 $\\times$ 10$^{-3}$ to 3 $\\mu$m. The absorption spectra of the O2-H2O mixtures are also compar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10811","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":"2026-05-17T23:59:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WNZ9yDWDD5Ytn6SIaehpufsZnC5y7iT+yuCywkaKNsCqwFX07/FlarV4kXYSSxxaMPPhcLAr6NeW+z99bp7gCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T07:25:56.146547Z"},"content_sha256":"6265cf6d22c86c3d20fea320c8d157aeb3ef9882008171e493a17342ac5f0cfc","schema_version":"1.0","event_id":"sha256:6265cf6d22c86c3d20fea320c8d157aeb3ef9882008171e493a17342ac5f0cfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/bundle.json","state_url":"https://pith.science/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/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":"2026-07-02T07:25:56Z","links":{"resolver":"https://pith.science/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD","bundle":"https://pith.science/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/bundle.json","state":"https://pith.science/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AQ76GOB3GYIFCXVH6UC3KIZEBD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AQ76GOB3GYIFCXVH6UC3KIZEBD","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":"fa3a12d516ca9950228a78c346a6466a775f6a890fa6f8a2923ab662ff785421","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-10-25T09:52:18Z","title_canon_sha256":"a04bfde995e6e1807b0b74f4c02553a0257e34c5f5a00ee6955624b3bd163753"},"schema_version":"1.0","source":{"id":"1810.10811","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.10811","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"arxiv_version","alias_value":"1810.10811v1","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.10811","created_at":"2026-05-17T23:59:48Z"},{"alias_kind":"pith_short_12","alias_value":"AQ76GOB3GYIF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AQ76GOB3GYIFCXVH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AQ76GOB3","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:6265cf6d22c86c3d20fea320c8d157aeb3ef9882008171e493a17342ac5f0cfc","target":"graph","created_at":"2026-05-17T23:59:48Z","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":"Aims. In this paper we investigate the detectability of the molecular oxygen in icy dust grain mantles towards astronomical objects. Methods. We present a systematic set of experiments with O2-H2O ice mixtures designed to disentangle how the molecular ratio affects the O2 signature in the mid- and near-infrared spectral regions. All the experiments were conducted in a closed-cycle helium cryostat coupled to a Fourier transform infrared spectrometer. The ice mixtures comprise varying thicknesses from 8 $\\times$ 10$^{-3}$ to 3 $\\mu$m. The absorption spectra of the O2-H2O mixtures are also compar","authors_text":"2, (2) Ural Federal University, 3), (3) Visiting Leading Researcher, A. I. Vasyunin (1, B. M. Giuliano (1), B. M\\\"uller (1), Ekaterinburg, Engineering Research Institute \"Ventspils International Radio Astronomy Centre\" of Ventspils University of Applied Sciences, Garching, Germany, Latvia), L. Bizzocchi (1), P. Caselli (1) ((1) Max-Planck-Institut fuer Extraterrestrische Physik, Russia, Ventspils","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-10-25T09:52:18Z","title":"O2 signature in thin and thick O2-H2O ices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10811","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":"sha256:0c1bd0f77b7a599c1f574d933dced35ecc739278f002a68778c9bb0cd1fdaec1","target":"record","created_at":"2026-05-17T23:59:48Z","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":"fa3a12d516ca9950228a78c346a6466a775f6a890fa6f8a2923ab662ff785421","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-10-25T09:52:18Z","title_canon_sha256":"a04bfde995e6e1807b0b74f4c02553a0257e34c5f5a00ee6955624b3bd163753"},"schema_version":"1.0","source":{"id":"1810.10811","kind":"arxiv","version":1}},"canonical_sha256":"043fe3383b3610515ea7f505b5232408cc58202bc12ae65bd322a065aee9023d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"043fe3383b3610515ea7f505b5232408cc58202bc12ae65bd322a065aee9023d","first_computed_at":"2026-05-17T23:59:48.877291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:48.877291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5kIPh5WigIJzs1wi8SeiBsB22dp6hyDmyrdgMwzYmzbLDhYnBNbFX8LdBgeqD/XETO+3sbI1p796lsR4PnE2Cw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:48.877746Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.10811","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c1bd0f77b7a599c1f574d933dced35ecc739278f002a68778c9bb0cd1fdaec1","sha256:6265cf6d22c86c3d20fea320c8d157aeb3ef9882008171e493a17342ac5f0cfc"],"state_sha256":"b18253809554cd4bb396de053ac9238f8c30be298c49714240b8b6cdbd987e66"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JjciTwL8ihsqfxsuU0gYjRJ5UpZsVGxXTbSWrNnJV1Wli2RuqQTuJPRTpDmX+ENg8ZlE57FRlDoTQqQRpUdRDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T07:25:56.148489Z","bundle_sha256":"b0110fd9f057ce166c52ff74ebcd83ac6d2fd6ffc26381cadabc5ef8b7a4647f"}}