{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:ORPYDIBFBZGCELYX5F5X3CPTIJ","short_pith_number":"pith:ORPYDIBF","canonical_record":{"source":{"id":"astro-ph/9508131","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-08-28T17:55:54Z","cross_cats_sorted":[],"title_canon_sha256":"e91aa36d0dbedfc7c5113a08f038351da515d48f50411defe008090920121753","abstract_canon_sha256":"047e2630b608c2543fa1bb497215c213f89ec4d1c53b6b51d9fbb7775bd5eac3"},"schema_version":"1.0"},"canonical_sha256":"745f81a0250e4c222f17e97b7d89f3425796fc2dc92f0d506010f485e4b8ed8a","source":{"kind":"arxiv","id":"astro-ph/9508131","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9508131","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9508131v1","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9508131","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"ORPYDIBFBZGC","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_16","alias_value":"ORPYDIBFBZGCELYX","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_8","alias_value":"ORPYDIBF","created_at":"2026-07-04T15:58:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:ORPYDIBFBZGCELYX5F5X3CPTIJ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9508131","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-08-28T17:55:54Z","cross_cats_sorted":[],"title_canon_sha256":"e91aa36d0dbedfc7c5113a08f038351da515d48f50411defe008090920121753","abstract_canon_sha256":"047e2630b608c2543fa1bb497215c213f89ec4d1c53b6b51d9fbb7775bd5eac3"},"schema_version":"1.0"},"canonical_sha256":"745f81a0250e4c222f17e97b7d89f3425796fc2dc92f0d506010f485e4b8ed8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:58:05.900535Z","signature_b64":"s7Hok3bQ8mdjy8dBKQyvnEjI2OR9y0QGfEDvlA7n/mBEeiDS/wayn3FQCEYR1QDqIQAjtwEzvGBzDnpslwmOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"745f81a0250e4c222f17e97b7d89f3425796fc2dc92f0d506010f485e4b8ed8a","last_reissued_at":"2026-07-04T15:58:05.900180Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:58:05.900180Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9508131","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":"2026-07-04T15:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eZE/g1QjdXJ8DjvRaEdFY1nWud2M7x6GkUCHPuJpM+viAQ5SFRrQs/Cw7cPQnsIYhofpWeUf0dFqiKoRIqKsDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T05:55:00.833586Z"},"content_sha256":"40c1571f335ae1f1254370606ae0b8b99c57edac2f902b9016a239b8301b60ba","schema_version":"1.0","event_id":"sha256:40c1571f335ae1f1254370606ae0b8b99c57edac2f902b9016a239b8301b60ba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:ORPYDIBFBZGCELYX5F5X3CPTIJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New \"Einstein Cross\" Gravitational Lens Candidates in HST WFPC2 Survey Images","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Baltimore, Eric J. Ostrander, Johns Hopkins University, Kavan U. Ratnatunga, MD), Myungshin Im (HST Medium Deep Survey, Richard E. Griffiths","submitted_at":"1995-08-28T17:55:54Z","abstract_excerpt":"We report the serendipitous discovery of ``Einstein cross'' gravitational lens candidates using the Hubble Space Telescope. We have so far discovered two good examples of such lenses, each in the form of four faint blue images located in a symmetric configuration around a red elliptical galaxy. The high resolution of HST has facilitated the discovery of this optically selected sample of faint lenses with small (~1 arcsec) separations between the (I ~ 25-27) lensed components and the much brighter (I ~ 19-22) lensing galaxies. The sample has been discovered in the routine processing of HST fiel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9508131","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/astro-ph/9508131/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rHc6WQ3k5vs6T8m8LaeYMD5laYVSM/0TIEf4+NpjMVOi1kXsNNuTFfjQDsOw4oRA4Jd4nDbYKVRqYxf1aIhkCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T05:55:00.834107Z"},"content_sha256":"49edb2036b07f021031dbde46e763dc7409e3561a098a00a9169f4f671a4eaf9","schema_version":"1.0","event_id":"sha256:49edb2036b07f021031dbde46e763dc7409e3561a098a00a9169f4f671a4eaf9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/bundle.json","state_url":"https://pith.science/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/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":"2026-08-08T05:55:00Z","links":{"resolver":"https://pith.science/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ","bundle":"https://pith.science/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/bundle.json","state":"https://pith.science/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ORPYDIBFBZGCELYX5F5X3CPTIJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:ORPYDIBFBZGCELYX5F5X3CPTIJ","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":"047e2630b608c2543fa1bb497215c213f89ec4d1c53b6b51d9fbb7775bd5eac3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-08-28T17:55:54Z","title_canon_sha256":"e91aa36d0dbedfc7c5113a08f038351da515d48f50411defe008090920121753"},"schema_version":"1.0","source":{"id":"astro-ph/9508131","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9508131","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9508131v1","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9508131","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"ORPYDIBFBZGC","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_16","alias_value":"ORPYDIBFBZGCELYX","created_at":"2026-07-04T15:58:05Z"},{"alias_kind":"pith_short_8","alias_value":"ORPYDIBF","created_at":"2026-07-04T15:58:05Z"}],"graph_snapshots":[{"event_id":"sha256:49edb2036b07f021031dbde46e763dc7409e3561a098a00a9169f4f671a4eaf9","target":"graph","created_at":"2026-07-04T15:58:05Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9508131/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the serendipitous discovery of ``Einstein cross'' gravitational lens candidates using the Hubble Space Telescope. We have so far discovered two good examples of such lenses, each in the form of four faint blue images located in a symmetric configuration around a red elliptical galaxy. The high resolution of HST has facilitated the discovery of this optically selected sample of faint lenses with small (~1 arcsec) separations between the (I ~ 25-27) lensed components and the much brighter (I ~ 19-22) lensing galaxies. The sample has been discovered in the routine processing of HST fiel","authors_text":"Baltimore, Eric J. Ostrander, Johns Hopkins University, Kavan U. Ratnatunga, MD), Myungshin Im (HST Medium Deep Survey, Richard E. Griffiths","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1995-08-28T17:55:54Z","title":"New \"Einstein Cross\" Gravitational Lens Candidates in HST WFPC2 Survey Images"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9508131","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":"sha256:40c1571f335ae1f1254370606ae0b8b99c57edac2f902b9016a239b8301b60ba","target":"record","created_at":"2026-07-04T15:58:05Z","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":"047e2630b608c2543fa1bb497215c213f89ec4d1c53b6b51d9fbb7775bd5eac3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-08-28T17:55:54Z","title_canon_sha256":"e91aa36d0dbedfc7c5113a08f038351da515d48f50411defe008090920121753"},"schema_version":"1.0","source":{"id":"astro-ph/9508131","kind":"arxiv","version":1}},"canonical_sha256":"745f81a0250e4c222f17e97b7d89f3425796fc2dc92f0d506010f485e4b8ed8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"745f81a0250e4c222f17e97b7d89f3425796fc2dc92f0d506010f485e4b8ed8a","first_computed_at":"2026-07-04T15:58:05.900180Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:58:05.900180Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s7Hok3bQ8mdjy8dBKQyvnEjI2OR9y0QGfEDvlA7n/mBEeiDS/wayn3FQCEYR1QDqIQAjtwEzvGBzDnpslwmOCg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:58:05.900535Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9508131","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40c1571f335ae1f1254370606ae0b8b99c57edac2f902b9016a239b8301b60ba","sha256:49edb2036b07f021031dbde46e763dc7409e3561a098a00a9169f4f671a4eaf9"],"state_sha256":"4f571ef84be568218530fc26a0c30ee153fec8694628ea6812855e9a1e910f83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q33zED4BG2lykh9AyLC3643BmGltMD9o0v504hS6t3hzATP8aWTbg2Qvd62Ri6D+Os/PshmwfrZFZm4l6k5zDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T05:55:00.837790Z","bundle_sha256":"b09cfa08a44c790fdda9d772f5792ef97b82fccab932438a0c70ee47af8ec5fe"}}