{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:TYO2I4MXXFR4KXONXXXXBBXSEN","short_pith_number":"pith:TYO2I4MX","canonical_record":{"source":{"id":"astro-ph/0201017","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-02T19:01:34Z","cross_cats_sorted":[],"title_canon_sha256":"8663a6759b529f3893eabc3aa6b38d21ef1027a8cdd50c65c82c45a3ba750e39","abstract_canon_sha256":"2077b045d1f3905256959be856bea3c36bb87764e2bc79d1a534a5f6945bf286"},"schema_version":"1.0"},"canonical_sha256":"9e1da47197b963c55dcdbdef7086f223758fd88517ad672fe9fcc917812632ec","source":{"kind":"arxiv","id":"astro-ph/0201017","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201017","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201017v2","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201017","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_12","alias_value":"TYO2I4MXXFR4","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_16","alias_value":"TYO2I4MXXFR4KXON","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_8","alias_value":"TYO2I4MX","created_at":"2026-07-04T16:29:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:TYO2I4MXXFR4KXONXXXXBBXSEN","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0201017","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-02T19:01:34Z","cross_cats_sorted":[],"title_canon_sha256":"8663a6759b529f3893eabc3aa6b38d21ef1027a8cdd50c65c82c45a3ba750e39","abstract_canon_sha256":"2077b045d1f3905256959be856bea3c36bb87764e2bc79d1a534a5f6945bf286"},"schema_version":"1.0"},"canonical_sha256":"9e1da47197b963c55dcdbdef7086f223758fd88517ad672fe9fcc917812632ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:11.762079Z","signature_b64":"jDRHLxRj+9EoyXPXJ4VgDajsqT4nhePQJQlJbUtqU5j3kjASyALsWB3AWzPDBXOPOpvzHB5mxvso/zd4LXy9Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e1da47197b963c55dcdbdef7086f223758fd88517ad672fe9fcc917812632ec","last_reissued_at":"2026-07-04T16:29:11.761700Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:11.761700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0201017","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:29:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5dJ+TxpSgwZC0bieuqrTaPhnusvMQDStRD53YITC2D9N7b2FUc6JIqKOHFANxy3H4pLdE0WE0YsuK1LLloYMAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T05:01:23.192308Z"},"content_sha256":"a2037089000bbf9d08cb8937f9e1e760fd8b2c811783bba0ffa5e02339c3abb4","schema_version":"1.0","event_id":"sha256:a2037089000bbf9d08cb8937f9e1e760fd8b2c811783bba0ffa5e02339c3abb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:TYO2I4MXXFR4KXONXXXXBBXSEN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The stellar velocity dispersion of the lens galaxy in MG2016+112 at z=1.004","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Astronomy, Caltech, Caltech), L.V.E. Koopmans (1), T. Treu (2) ((1) Theoretical Astrophysics","submitted_at":"2002-01-02T19:01:34Z","abstract_excerpt":"We present a direct measurement of the stellar velocity dispersion of the early-type lens galaxy D in the system MG2016+112 (z=1.004), determined from a spectrum obtained with the Echelle Spectrograph and Imager (ESI) on the W.M. Keck-II Telescope, as part of the Lenses Structure and Dynamics (LSD) Survey. We find a velocity dispersion of sigma_ap=304+-27 km/s inside an effective circular aperture with a radius of 0.65'', corresponding to a central velocity dispersion of sigma=328+-32 km/s. From a Hubble Space Telescope F160W-band image, we measure the effective radius and effective surface br"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201017","kind":"arxiv","version":2},"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/0201017/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":"2026-07-04T16:29:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"olIB0yYtryz8gmKj9ytWxFLkzeyYJa/SfhBa/gYFmQzOTjtjCMq21b9Ms3RAnWnFL1Q/WPptu3+LZgN3QXLjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T05:01:23.192873Z"},"content_sha256":"9b13f3f1767e8aa8aaf62b1cb5dafb9d0225785821a5713543718bb951098a97","schema_version":"1.0","event_id":"sha256:9b13f3f1767e8aa8aaf62b1cb5dafb9d0225785821a5713543718bb951098a97"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/bundle.json","state_url":"https://pith.science/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/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":"2026-08-04T05:01:23Z","links":{"resolver":"https://pith.science/pith/TYO2I4MXXFR4KXONXXXXBBXSEN","bundle":"https://pith.science/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/bundle.json","state":"https://pith.science/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TYO2I4MXXFR4KXONXXXXBBXSEN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:TYO2I4MXXFR4KXONXXXXBBXSEN","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":"2077b045d1f3905256959be856bea3c36bb87764e2bc79d1a534a5f6945bf286","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-02T19:01:34Z","title_canon_sha256":"8663a6759b529f3893eabc3aa6b38d21ef1027a8cdd50c65c82c45a3ba750e39"},"schema_version":"1.0","source":{"id":"astro-ph/0201017","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201017","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201017v2","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201017","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_12","alias_value":"TYO2I4MXXFR4","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_16","alias_value":"TYO2I4MXXFR4KXON","created_at":"2026-07-04T16:29:11Z"},{"alias_kind":"pith_short_8","alias_value":"TYO2I4MX","created_at":"2026-07-04T16:29:11Z"}],"graph_snapshots":[{"event_id":"sha256:9b13f3f1767e8aa8aaf62b1cb5dafb9d0225785821a5713543718bb951098a97","target":"graph","created_at":"2026-07-04T16:29:11Z","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/0201017/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a direct measurement of the stellar velocity dispersion of the early-type lens galaxy D in the system MG2016+112 (z=1.004), determined from a spectrum obtained with the Echelle Spectrograph and Imager (ESI) on the W.M. Keck-II Telescope, as part of the Lenses Structure and Dynamics (LSD) Survey. We find a velocity dispersion of sigma_ap=304+-27 km/s inside an effective circular aperture with a radius of 0.65'', corresponding to a central velocity dispersion of sigma=328+-32 km/s. From a Hubble Space Telescope F160W-band image, we measure the effective radius and effective surface br","authors_text":"(2) Astronomy, Caltech, Caltech), L.V.E. Koopmans (1), T. Treu (2) ((1) Theoretical Astrophysics","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-01-02T19:01:34Z","title":"The stellar velocity dispersion of the lens galaxy in MG2016+112 at z=1.004"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201017","kind":"arxiv","version":2},"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:a2037089000bbf9d08cb8937f9e1e760fd8b2c811783bba0ffa5e02339c3abb4","target":"record","created_at":"2026-07-04T16:29:11Z","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":"2077b045d1f3905256959be856bea3c36bb87764e2bc79d1a534a5f6945bf286","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-02T19:01:34Z","title_canon_sha256":"8663a6759b529f3893eabc3aa6b38d21ef1027a8cdd50c65c82c45a3ba750e39"},"schema_version":"1.0","source":{"id":"astro-ph/0201017","kind":"arxiv","version":2}},"canonical_sha256":"9e1da47197b963c55dcdbdef7086f223758fd88517ad672fe9fcc917812632ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e1da47197b963c55dcdbdef7086f223758fd88517ad672fe9fcc917812632ec","first_computed_at":"2026-07-04T16:29:11.761700Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:29:11.761700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jDRHLxRj+9EoyXPXJ4VgDajsqT4nhePQJQlJbUtqU5j3kjASyALsWB3AWzPDBXOPOpvzHB5mxvso/zd4LXy9Aw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:29:11.762079Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0201017","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2037089000bbf9d08cb8937f9e1e760fd8b2c811783bba0ffa5e02339c3abb4","sha256:9b13f3f1767e8aa8aaf62b1cb5dafb9d0225785821a5713543718bb951098a97"],"state_sha256":"b4c56e1c81a871943676e2f11dd7b9df9d95b307699b1327c2a97f3d501946f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rusX1qdPNMUyBQAgAoKWiMQ3wUo5cvcZJsEyI4CfjbrEqa6tsmISvuzLEgQGun++wTBdQkxHG45GMInBGcKBBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T05:01:23.199932Z","bundle_sha256":"0b12eeee8ba32ab1a8b2e9aa63ffe8ca336d00f24db0e07f64537710abfbdc80"}}