{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:HPSVIQJSWNQOSQF6333QJTP5UP","short_pith_number":"pith:HPSVIQJS","canonical_record":{"source":{"id":"1101.2351","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-01-12T13:22:11Z","cross_cats_sorted":[],"title_canon_sha256":"be4848c74a509a326417ff06029857568f2ef689d2cfc42c9d3fb8650d6e7fa9","abstract_canon_sha256":"2853539d304ec9136103399e7531028fdef842ffc693c340fda728294977a0d2"},"schema_version":"1.0"},"canonical_sha256":"3be5544132b360e940bedef704cdfda3ca0e94add2a5a1bc641c6b68262723ed","source":{"kind":"arxiv","id":"1101.2351","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.2351","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"arxiv_version","alias_value":"1101.2351v1","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.2351","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"pith_short_12","alias_value":"HPSVIQJSWNQO","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HPSVIQJSWNQOSQF6","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HPSVIQJS","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:HPSVIQJSWNQOSQF6333QJTP5UP","target":"record","payload":{"canonical_record":{"source":{"id":"1101.2351","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-01-12T13:22:11Z","cross_cats_sorted":[],"title_canon_sha256":"be4848c74a509a326417ff06029857568f2ef689d2cfc42c9d3fb8650d6e7fa9","abstract_canon_sha256":"2853539d304ec9136103399e7531028fdef842ffc693c340fda728294977a0d2"},"schema_version":"1.0"},"canonical_sha256":"3be5544132b360e940bedef704cdfda3ca0e94add2a5a1bc641c6b68262723ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:22:58.291966Z","signature_b64":"Et6JhE/E40AIWGoRln2xAbC54QCRBacdzr5HCXYnO8+5qlHHpqBJbN1rVr02At4IlAJJxjspblgD4i53Q8jdDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3be5544132b360e940bedef704cdfda3ca0e94add2a5a1bc641c6b68262723ed","last_reissued_at":"2026-05-18T02:22:58.291295Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:22:58.291295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.2351","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":"2026-05-18T02:22:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zyFHAa16Dw4i6dgRjaugF9oAmdXu1t4mLM5RdrpWxQImttj1qt/zOeNHXTn7emQ3q7V5X0XmomtACrWXJczhAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T05:04:42.218119Z"},"content_sha256":"2de2eae95b9caf6e45083d5a0ba3077672f96ecca357441ffa0daa2621f646ae","schema_version":"1.0","event_id":"sha256:2de2eae95b9caf6e45083d5a0ba3077672f96ecca357441ffa0daa2621f646ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:HPSVIQJSWNQOSQF6333QJTP5UP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Twilight observations with MASS-DIMM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Boris Safonov","submitted_at":"2011-01-12T13:22:11Z","abstract_excerpt":"In this paper we describe the method of measurement of optical turbulence in twilight with MASS-DIMM. Some results of such observations carried out with SAI ASM installed on Mt. Shatdzatmaz: 1) characteristics of optical turbulence don't change significantly in transition between day and night 2) twilight measurements of seeing can be used for selection of observational program for big telescope on condition that program switching is long - longer than 30-40 minutes. In conclusions we list upgrades of ASM system needed to improve capabilities to observe on twilight."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.2351","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":"2026-05-18T02:22:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9nphc3306XydkPbDhtQzF8ckJ3EsEhE1v5AJSfufzKgiheIYIBtWZzStg+8gVqdoRGWZeRqRDbqYCyBoyv5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T05:04:42.218475Z"},"content_sha256":"dc63963b076ea596bb4069160ce3c3315c267cdf834d7ec275906a20a1a41eaa","schema_version":"1.0","event_id":"sha256:dc63963b076ea596bb4069160ce3c3315c267cdf834d7ec275906a20a1a41eaa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HPSVIQJSWNQOSQF6333QJTP5UP/bundle.json","state_url":"https://pith.science/pith/HPSVIQJSWNQOSQF6333QJTP5UP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HPSVIQJSWNQOSQF6333QJTP5UP/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":"2026-06-27T05:04:42Z","links":{"resolver":"https://pith.science/pith/HPSVIQJSWNQOSQF6333QJTP5UP","bundle":"https://pith.science/pith/HPSVIQJSWNQOSQF6333QJTP5UP/bundle.json","state":"https://pith.science/pith/HPSVIQJSWNQOSQF6333QJTP5UP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HPSVIQJSWNQOSQF6333QJTP5UP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:HPSVIQJSWNQOSQF6333QJTP5UP","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":"2853539d304ec9136103399e7531028fdef842ffc693c340fda728294977a0d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-01-12T13:22:11Z","title_canon_sha256":"be4848c74a509a326417ff06029857568f2ef689d2cfc42c9d3fb8650d6e7fa9"},"schema_version":"1.0","source":{"id":"1101.2351","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.2351","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"arxiv_version","alias_value":"1101.2351v1","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.2351","created_at":"2026-05-18T02:22:58Z"},{"alias_kind":"pith_short_12","alias_value":"HPSVIQJSWNQO","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HPSVIQJSWNQOSQF6","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HPSVIQJS","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:dc63963b076ea596bb4069160ce3c3315c267cdf834d7ec275906a20a1a41eaa","target":"graph","created_at":"2026-05-18T02:22:58Z","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":"In this paper we describe the method of measurement of optical turbulence in twilight with MASS-DIMM. Some results of such observations carried out with SAI ASM installed on Mt. Shatdzatmaz: 1) characteristics of optical turbulence don't change significantly in transition between day and night 2) twilight measurements of seeing can be used for selection of observational program for big telescope on condition that program switching is long - longer than 30-40 minutes. In conclusions we list upgrades of ASM system needed to improve capabilities to observe on twilight.","authors_text":"Boris Safonov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-01-12T13:22:11Z","title":"Twilight observations with MASS-DIMM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.2351","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":"sha256:2de2eae95b9caf6e45083d5a0ba3077672f96ecca357441ffa0daa2621f646ae","target":"record","created_at":"2026-05-18T02:22:58Z","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":"2853539d304ec9136103399e7531028fdef842ffc693c340fda728294977a0d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-01-12T13:22:11Z","title_canon_sha256":"be4848c74a509a326417ff06029857568f2ef689d2cfc42c9d3fb8650d6e7fa9"},"schema_version":"1.0","source":{"id":"1101.2351","kind":"arxiv","version":1}},"canonical_sha256":"3be5544132b360e940bedef704cdfda3ca0e94add2a5a1bc641c6b68262723ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3be5544132b360e940bedef704cdfda3ca0e94add2a5a1bc641c6b68262723ed","first_computed_at":"2026-05-18T02:22:58.291295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:22:58.291295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Et6JhE/E40AIWGoRln2xAbC54QCRBacdzr5HCXYnO8+5qlHHpqBJbN1rVr02At4IlAJJxjspblgD4i53Q8jdDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:22:58.291966Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.2351","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2de2eae95b9caf6e45083d5a0ba3077672f96ecca357441ffa0daa2621f646ae","sha256:dc63963b076ea596bb4069160ce3c3315c267cdf834d7ec275906a20a1a41eaa"],"state_sha256":"8c12262dad2d0fc136b468916ee55a2feca4dbcb6bed6e8e98cb2eaaea7d064e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KdWQ7SK/8dTTa3YUCXtefCMwA4ZARApGcHn6PmP4I837UTJsq9xXmjrIjjjZkSwZsfBTNWH3aidtGLnV2oSEBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T05:04:42.222212Z","bundle_sha256":"e71870b38c7b05c51dab39b9bb7f50d55307898305eca6782749e584ff3d7198"}}