{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1996:DJ53WF5S7O7O6NWE24SW6HVFZQ","short_pith_number":"pith:DJ53WF5S","canonical_record":{"source":{"id":"astro-ph/9608154","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-08-23T23:16:44Z","cross_cats_sorted":[],"title_canon_sha256":"1670169c5b3c137a3f07cea4cd472744638e960aaa0a5a9b04526b80b3268a64","abstract_canon_sha256":"ea303842b07bf11de9871e1083538f69891ba218fe93ef0f69aee59439a63912"},"schema_version":"1.0"},"canonical_sha256":"1a7bbb17b2fbbeef36c4d7256f1ea5cc1c227b959e293f6bafb1e562d8479433","source":{"kind":"arxiv","id":"astro-ph/9608154","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9608154","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9608154v1","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9608154","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"pith_short_12","alias_value":"DJ53WF5S7O7O","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"DJ53WF5S7O7O6NWE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"DJ53WF5S","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1996:DJ53WF5S7O7O6NWE24SW6HVFZQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9608154","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-08-23T23:16:44Z","cross_cats_sorted":[],"title_canon_sha256":"1670169c5b3c137a3f07cea4cd472744638e960aaa0a5a9b04526b80b3268a64","abstract_canon_sha256":"ea303842b07bf11de9871e1083538f69891ba218fe93ef0f69aee59439a63912"},"schema_version":"1.0"},"canonical_sha256":"1a7bbb17b2fbbeef36c4d7256f1ea5cc1c227b959e293f6bafb1e562d8479433","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:19.486350Z","signature_b64":"CG6A9crWcEFrFek9vlaE53pe0pGvsHibLHtTEnLMxjMv1ZaLCxdjYTgMrlnDFRubosqXp7vkXXw5zjOP2cIADA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a7bbb17b2fbbeef36c4d7256f1ea5cc1c227b959e293f6bafb1e562d8479433","last_reissued_at":"2026-05-18T01:40:19.485662Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:19.485662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9608154","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":"2026-05-18T01:40:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EiMLy2aVvcn+PH+oFsDpimDVq8Fkf64yXUMAMsFOxEuEecYt0cxICFKNBxv3J1Mz8OOPpNERTl9CS1zIB5TsDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:57:30.956157Z"},"content_sha256":"e1a14eb70395e7903ce45177eaa9571346cce561924adcfdf607808444c7670a","schema_version":"1.0","event_id":"sha256:e1a14eb70395e7903ce45177eaa9571346cce561924adcfdf607808444c7670a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1996:DJ53WF5S7O7O6NWE24SW6HVFZQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Liquid Mirror Telescopes: A progress report","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Ermanno F. Borra, Gerard Lemaitre, Gilberto Moretto, Gregoire Tremblay, Luc Girard, Marc Ferrari","submitted_at":"1996-08-23T23:16:44Z","abstract_excerpt":"We review the present status of liquid mirror telescopes. Interferometric tests of liquid mirrors (the largest one having a diameter of 2.5 meters ) show excellent optical qualities. The basic technology is now sufficiently reliable that it can be put to work. Indeed, a handful of liquid mirrors have now been built that are used for scientific work. A 3.7-m diameter LMT is presently being built in the new Laval upgraded testing facilities. Construction of the mirror can be followed on the Web site: http://astrosun.phy.ulaval.ca/lmt/lmt- home.html. Finally we address the issue of the field acce"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9608154","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":"2026-05-18T01:40:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lf+hLSbB3BKhcQPt35kHZg3P27yBsfNx7wnsfO3EOHxC7lgVMzAzkKIp6UsfY9Ly9JO0eTEAq0J0Ow9c2FhVDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T09:57:30.956791Z"},"content_sha256":"0b1374e4ecb55cc89fa3586fbf1b171bc27573d21fcfd6583fe3271dbbf08af2","schema_version":"1.0","event_id":"sha256:0b1374e4ecb55cc89fa3586fbf1b171bc27573d21fcfd6583fe3271dbbf08af2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/bundle.json","state_url":"https://pith.science/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/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":"2026-05-27T09:57:30Z","links":{"resolver":"https://pith.science/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ","bundle":"https://pith.science/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/bundle.json","state":"https://pith.science/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DJ53WF5S7O7O6NWE24SW6HVFZQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:DJ53WF5S7O7O6NWE24SW6HVFZQ","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":"ea303842b07bf11de9871e1083538f69891ba218fe93ef0f69aee59439a63912","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-08-23T23:16:44Z","title_canon_sha256":"1670169c5b3c137a3f07cea4cd472744638e960aaa0a5a9b04526b80b3268a64"},"schema_version":"1.0","source":{"id":"astro-ph/9608154","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9608154","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9608154v1","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9608154","created_at":"2026-05-18T01:40:19Z"},{"alias_kind":"pith_short_12","alias_value":"DJ53WF5S7O7O","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"DJ53WF5S7O7O6NWE","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"DJ53WF5S","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:0b1374e4ecb55cc89fa3586fbf1b171bc27573d21fcfd6583fe3271dbbf08af2","target":"graph","created_at":"2026-05-18T01:40:19Z","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":"We review the present status of liquid mirror telescopes. Interferometric tests of liquid mirrors (the largest one having a diameter of 2.5 meters ) show excellent optical qualities. The basic technology is now sufficiently reliable that it can be put to work. Indeed, a handful of liquid mirrors have now been built that are used for scientific work. A 3.7-m diameter LMT is presently being built in the new Laval upgraded testing facilities. Construction of the mirror can be followed on the Web site: http://astrosun.phy.ulaval.ca/lmt/lmt- home.html. Finally we address the issue of the field acce","authors_text":"Ermanno F. Borra, Gerard Lemaitre, Gilberto Moretto, Gregoire Tremblay, Luc Girard, Marc Ferrari","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1996-08-23T23:16:44Z","title":"Liquid Mirror Telescopes: A progress report"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9608154","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:e1a14eb70395e7903ce45177eaa9571346cce561924adcfdf607808444c7670a","target":"record","created_at":"2026-05-18T01:40:19Z","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":"ea303842b07bf11de9871e1083538f69891ba218fe93ef0f69aee59439a63912","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-08-23T23:16:44Z","title_canon_sha256":"1670169c5b3c137a3f07cea4cd472744638e960aaa0a5a9b04526b80b3268a64"},"schema_version":"1.0","source":{"id":"astro-ph/9608154","kind":"arxiv","version":1}},"canonical_sha256":"1a7bbb17b2fbbeef36c4d7256f1ea5cc1c227b959e293f6bafb1e562d8479433","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a7bbb17b2fbbeef36c4d7256f1ea5cc1c227b959e293f6bafb1e562d8479433","first_computed_at":"2026-05-18T01:40:19.485662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:19.485662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CG6A9crWcEFrFek9vlaE53pe0pGvsHibLHtTEnLMxjMv1ZaLCxdjYTgMrlnDFRubosqXp7vkXXw5zjOP2cIADA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:19.486350Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9608154","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e1a14eb70395e7903ce45177eaa9571346cce561924adcfdf607808444c7670a","sha256:0b1374e4ecb55cc89fa3586fbf1b171bc27573d21fcfd6583fe3271dbbf08af2"],"state_sha256":"0dc984047ff8b8a5f90d8bb42b904187f8319e4d0733e8d821dc472460e9ae10"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uZjfzwy3ATSLjddtOMCwHA1Fr4f5R2AyK38JsO/a7BIF88eHum4i8MgaUoG15SwE3RHBBmZtb6eAuMRSEOp2CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T09:57:30.959978Z","bundle_sha256":"441916507a9a95f9fc5e7acada647ba103df0141564c6673ebd700b9c2b876b4"}}