{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:P6IUNRD5GYOULW3OM4LK56RZWT","short_pith_number":"pith:P6IUNRD5","canonical_record":{"source":{"id":"astro-ph/0202342","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-18T23:59:14Z","cross_cats_sorted":[],"title_canon_sha256":"f6ac10134acf2bf7e4d84d24140851a146f00d3c03ff4998d95e7416ec4edf09","abstract_canon_sha256":"611fd53bc14d3c19e809d710d440fc2d6f76d44c3fa044d9465127dccb9f3644"},"schema_version":"1.0"},"canonical_sha256":"7f9146c47d361d45db6e6716aefa39b4f4e919a3c82e43561426cc5ab2f2da9e","source":{"kind":"arxiv","id":"astro-ph/0202342","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0202342","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0202342v2","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0202342","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_12","alias_value":"P6IUNRD5GYOU","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"P6IUNRD5GYOULW3O","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"P6IUNRD5","created_at":"2026-07-04T16:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:P6IUNRD5GYOULW3OM4LK56RZWT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0202342","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-18T23:59:14Z","cross_cats_sorted":[],"title_canon_sha256":"f6ac10134acf2bf7e4d84d24140851a146f00d3c03ff4998d95e7416ec4edf09","abstract_canon_sha256":"611fd53bc14d3c19e809d710d440fc2d6f76d44c3fa044d9465127dccb9f3644"},"schema_version":"1.0"},"canonical_sha256":"7f9146c47d361d45db6e6716aefa39b4f4e919a3c82e43561426cc5ab2f2da9e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:25.551598Z","signature_b64":"qOhSeITVNiFpRiGsxSgcLRJer/pdu6IZGA1+VogAucKsPMTBKplmOs2RpHz2kDAnXmlW8gDqri2PD04P7jXoBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7f9146c47d361d45db6e6716aefa39b4f4e919a3c82e43561426cc5ab2f2da9e","last_reissued_at":"2026-07-04T16:29:25.551236Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:25.551236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0202342","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":"2026-07-04T16:29:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"01hUN2loWOMk483VCRLW7gohwhQyUidNl9oPLTF2jLWNHWcx8cD6iLnoFGspIUP5D1skIqv3zkm/eXi135zoDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T16:04:19.668221Z"},"content_sha256":"9638e681c72c50520747288a33198b21a59ee7939f70c5730cda5e3725d95b1a","schema_version":"1.0","event_id":"sha256:9638e681c72c50520747288a33198b21a59ee7939f70c5730cda5e3725d95b1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:P6IUNRD5GYOULW3OM4LK56RZWT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The internal structure and formation of early-type galaxies: the gravitational--lens system MG2016+112 at z=1.004","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Leon Koopmans (CalTech), Tommaso Treu","submitted_at":"2002-02-18T23:59:14Z","abstract_excerpt":"[Abridged] We combine our measurements of the velocity dispersion and the surface brightness profile of the lens galaxy D in the system MG2016+112 (z=1.004) with constraints from gravitational lensing to study its internal mass distribution. We find that: (i) dark matter accounts for >50% of the total mass within the Einstein radius (99% CL), excluding at the 8-sigma level that mass follows light inside the Einstein radius with a constant mass-to-light ratio (M/L). (ii) the total mass distribution inside the Einstein radius is well-described by a density profile ~r^-gamma' with an effective sl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0202342","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/0202342/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":"2026-07-04T16:29:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bT+EiO6NUCrzC6C4qoWh8pXIe+iwKTh4trCiksrvM+sx+bJe4raOUGcqpWLRcktDb0NGtgWN887FvfOquWT5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T16:04:19.668990Z"},"content_sha256":"6cd63414e522e7cee14d1100d1ae44a15df7ddfe8b3a3d40a1ce2e4a65be3445","schema_version":"1.0","event_id":"sha256:6cd63414e522e7cee14d1100d1ae44a15df7ddfe8b3a3d40a1ce2e4a65be3445"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P6IUNRD5GYOULW3OM4LK56RZWT/bundle.json","state_url":"https://pith.science/pith/P6IUNRD5GYOULW3OM4LK56RZWT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P6IUNRD5GYOULW3OM4LK56RZWT/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":"2026-08-04T16:04:19Z","links":{"resolver":"https://pith.science/pith/P6IUNRD5GYOULW3OM4LK56RZWT","bundle":"https://pith.science/pith/P6IUNRD5GYOULW3OM4LK56RZWT/bundle.json","state":"https://pith.science/pith/P6IUNRD5GYOULW3OM4LK56RZWT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P6IUNRD5GYOULW3OM4LK56RZWT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:P6IUNRD5GYOULW3OM4LK56RZWT","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":"611fd53bc14d3c19e809d710d440fc2d6f76d44c3fa044d9465127dccb9f3644","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-18T23:59:14Z","title_canon_sha256":"f6ac10134acf2bf7e4d84d24140851a146f00d3c03ff4998d95e7416ec4edf09"},"schema_version":"1.0","source":{"id":"astro-ph/0202342","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0202342","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0202342v2","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0202342","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_12","alias_value":"P6IUNRD5GYOU","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"P6IUNRD5GYOULW3O","created_at":"2026-07-04T16:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"P6IUNRD5","created_at":"2026-07-04T16:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:6cd63414e522e7cee14d1100d1ae44a15df7ddfe8b3a3d40a1ce2e4a65be3445","target":"graph","created_at":"2026-07-04T16:29:25Z","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/0202342/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"[Abridged] We combine our measurements of the velocity dispersion and the surface brightness profile of the lens galaxy D in the system MG2016+112 (z=1.004) with constraints from gravitational lensing to study its internal mass distribution. We find that: (i) dark matter accounts for >50% of the total mass within the Einstein radius (99% CL), excluding at the 8-sigma level that mass follows light inside the Einstein radius with a constant mass-to-light ratio (M/L). (ii) the total mass distribution inside the Einstein radius is well-described by a density profile ~r^-gamma' with an effective sl","authors_text":"Leon Koopmans (CalTech), Tommaso Treu","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-02-18T23:59:14Z","title":"The internal structure and formation of early-type galaxies: the gravitational--lens system MG2016+112 at z=1.004"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0202342","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":"sha256:9638e681c72c50520747288a33198b21a59ee7939f70c5730cda5e3725d95b1a","target":"record","created_at":"2026-07-04T16:29:25Z","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":"611fd53bc14d3c19e809d710d440fc2d6f76d44c3fa044d9465127dccb9f3644","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-18T23:59:14Z","title_canon_sha256":"f6ac10134acf2bf7e4d84d24140851a146f00d3c03ff4998d95e7416ec4edf09"},"schema_version":"1.0","source":{"id":"astro-ph/0202342","kind":"arxiv","version":2}},"canonical_sha256":"7f9146c47d361d45db6e6716aefa39b4f4e919a3c82e43561426cc5ab2f2da9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7f9146c47d361d45db6e6716aefa39b4f4e919a3c82e43561426cc5ab2f2da9e","first_computed_at":"2026-07-04T16:29:25.551236Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:29:25.551236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qOhSeITVNiFpRiGsxSgcLRJer/pdu6IZGA1+VogAucKsPMTBKplmOs2RpHz2kDAnXmlW8gDqri2PD04P7jXoBg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:29:25.551598Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0202342","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9638e681c72c50520747288a33198b21a59ee7939f70c5730cda5e3725d95b1a","sha256:6cd63414e522e7cee14d1100d1ae44a15df7ddfe8b3a3d40a1ce2e4a65be3445"],"state_sha256":"2b6cd51476b6a26017ef70909fe9b797ff8d6009ad7d734c574d3d4a9fa2aa80"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O7Qh3LWrEynYAucxbC31/GviA4M+9jpquMkfQmugvQKdWvDlOv5MOm29LgTHArxKw/rDX7zB6ZBBYxk7HBmWCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T16:04:19.675549Z","bundle_sha256":"ab4f0357fd6ad1f6cefcd6dc8930000ba9f7ad710341fbf2495ea68a587a6212"}}