{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:FECJW7H7TAIAXH35MTX4OB7CWS","short_pith_number":"pith:FECJW7H7","canonical_record":{"source":{"id":"0910.1133","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T23:29:38Z","cross_cats_sorted":[],"title_canon_sha256":"c5ba3e595fcbcdca27ef3751ecb0882a05b4fb31edf610ad62c4e0cab2084f2b","abstract_canon_sha256":"b46ed3be817c599f188cd5d18a0c05775d2bb8f02ceca63eb4f1a4825d21264d"},"schema_version":"1.0"},"canonical_sha256":"29049b7cff98100b9f7d64efc707e2b48c09ad34b96459221f91673acde9226a","source":{"kind":"arxiv","id":"0910.1133","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1133","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1133v2","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1133","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"pith_short_12","alias_value":"FECJW7H7TAIA","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"FECJW7H7TAIAXH35","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"FECJW7H7","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:FECJW7H7TAIAXH35MTX4OB7CWS","target":"record","payload":{"canonical_record":{"source":{"id":"0910.1133","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T23:29:38Z","cross_cats_sorted":[],"title_canon_sha256":"c5ba3e595fcbcdca27ef3751ecb0882a05b4fb31edf610ad62c4e0cab2084f2b","abstract_canon_sha256":"b46ed3be817c599f188cd5d18a0c05775d2bb8f02ceca63eb4f1a4825d21264d"},"schema_version":"1.0"},"canonical_sha256":"29049b7cff98100b9f7d64efc707e2b48c09ad34b96459221f91673acde9226a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:26.028791Z","signature_b64":"lLKooWnLBGLyU+6UkZ1H+wFNYDb0B0SueAeUZm1Yh/iZISRfXog4Qf+7kpZyHrv4oT4HL19/5mBav1F2i1gFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"29049b7cff98100b9f7d64efc707e2b48c09ad34b96459221f91673acde9226a","last_reissued_at":"2026-05-18T02:11:26.028048Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:26.028048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.1133","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":"2026-05-18T02:11:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pdZSANnwuK8PIVB5XX1BNvNv6bAiPMOQ2S9lydhT+1DuY+R8NR0ORP7phB/yc6LKm8q9QfzwjMny2T7KHPusDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:51:19.120186Z"},"content_sha256":"83715e981e17142772fdb58e226b1838c5c4fb1dcaf37e7f16ecb8e1a4836eec","schema_version":"1.0","event_id":"sha256:83715e981e17142772fdb58e226b1838c5c4fb1dcaf37e7f16ecb8e1a4836eec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:FECJW7H7TAIAXH35MTX4OB7CWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The mass distribution of a moderate redshift galaxy group and brightest group galaxy from gravitational lensing and kinematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. More, C. D. Fassnacht, D. D. Kocevski, J. P. McKean, L. V. E. Koopmans, M. W. Auger, O. Czoske, S. Vegetti, T. Treu","submitted_at":"2009-10-06T23:29:38Z","abstract_excerpt":"The gravitational lens system CLASS B2108+213 has two radio-loud lensed images separated by 4.56 arcsec. The relatively large image separation implies that the lensing is caused by a group of galaxies. In this paper, new optical imaging and spectroscopic data for the lensing galaxies of B2108+213 and the surrounding field galaxies are presented. These data are used to investigate the mass and composition of the lensing structure. The redshift and stellar velocity dispersion of the main lensing galaxy (G1) are found to be z = 0.3648 +/- 0.0002 and sigma_v = 325 +/- 25 km/s, respectively. The op"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1133","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":""},"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":"2026-05-18T02:11:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OPg0N3hVLAIFKPttIFjgSZCO7mSk1y6BDe9mJql4m9F8Gfla6yuCDgsovJv3kX19loZ4r/Z5wB/71IQGp0dzBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:51:19.120556Z"},"content_sha256":"8d02b1c62683c7b331a02f8c5f02a39d68222de150f8a8a2160220cd086ac269","schema_version":"1.0","event_id":"sha256:8d02b1c62683c7b331a02f8c5f02a39d68222de150f8a8a2160220cd086ac269"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FECJW7H7TAIAXH35MTX4OB7CWS/bundle.json","state_url":"https://pith.science/pith/FECJW7H7TAIAXH35MTX4OB7CWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FECJW7H7TAIAXH35MTX4OB7CWS/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":"2026-06-03T07:51:19Z","links":{"resolver":"https://pith.science/pith/FECJW7H7TAIAXH35MTX4OB7CWS","bundle":"https://pith.science/pith/FECJW7H7TAIAXH35MTX4OB7CWS/bundle.json","state":"https://pith.science/pith/FECJW7H7TAIAXH35MTX4OB7CWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FECJW7H7TAIAXH35MTX4OB7CWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:FECJW7H7TAIAXH35MTX4OB7CWS","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":"b46ed3be817c599f188cd5d18a0c05775d2bb8f02ceca63eb4f1a4825d21264d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T23:29:38Z","title_canon_sha256":"c5ba3e595fcbcdca27ef3751ecb0882a05b4fb31edf610ad62c4e0cab2084f2b"},"schema_version":"1.0","source":{"id":"0910.1133","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1133","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1133v2","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1133","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"pith_short_12","alias_value":"FECJW7H7TAIA","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"FECJW7H7TAIAXH35","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"FECJW7H7","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:8d02b1c62683c7b331a02f8c5f02a39d68222de150f8a8a2160220cd086ac269","target":"graph","created_at":"2026-05-18T02:11:26Z","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":"The gravitational lens system CLASS B2108+213 has two radio-loud lensed images separated by 4.56 arcsec. The relatively large image separation implies that the lensing is caused by a group of galaxies. In this paper, new optical imaging and spectroscopic data for the lensing galaxies of B2108+213 and the surrounding field galaxies are presented. These data are used to investigate the mass and composition of the lensing structure. The redshift and stellar velocity dispersion of the main lensing galaxy (G1) are found to be z = 0.3648 +/- 0.0002 and sigma_v = 325 +/- 25 km/s, respectively. The op","authors_text":"A. More, C. D. Fassnacht, D. D. Kocevski, J. P. McKean, L. V. E. Koopmans, M. W. Auger, O. Czoske, S. Vegetti, T. Treu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T23:29:38Z","title":"The mass distribution of a moderate redshift galaxy group and brightest group galaxy from gravitational lensing and kinematics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1133","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":"sha256:83715e981e17142772fdb58e226b1838c5c4fb1dcaf37e7f16ecb8e1a4836eec","target":"record","created_at":"2026-05-18T02:11:26Z","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":"b46ed3be817c599f188cd5d18a0c05775d2bb8f02ceca63eb4f1a4825d21264d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-06T23:29:38Z","title_canon_sha256":"c5ba3e595fcbcdca27ef3751ecb0882a05b4fb31edf610ad62c4e0cab2084f2b"},"schema_version":"1.0","source":{"id":"0910.1133","kind":"arxiv","version":2}},"canonical_sha256":"29049b7cff98100b9f7d64efc707e2b48c09ad34b96459221f91673acde9226a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"29049b7cff98100b9f7d64efc707e2b48c09ad34b96459221f91673acde9226a","first_computed_at":"2026-05-18T02:11:26.028048Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:26.028048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lLKooWnLBGLyU+6UkZ1H+wFNYDb0B0SueAeUZm1Yh/iZISRfXog4Qf+7kpZyHrv4oT4HL19/5mBav1F2i1gFBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:26.028791Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.1133","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83715e981e17142772fdb58e226b1838c5c4fb1dcaf37e7f16ecb8e1a4836eec","sha256:8d02b1c62683c7b331a02f8c5f02a39d68222de150f8a8a2160220cd086ac269"],"state_sha256":"5fa5f0ed1ad37c4edf24d5888c97056a104c524ef8d8fd8eb7155f20632666a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mukNI4yndsQLsCl3zizWxZdiuzfowQzULfyjuL4R2QzmnPNNcSUGOt/7lPuSG2fsbrC0+MPKLppYUUVBq7g/Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:51:19.122586Z","bundle_sha256":"31b9335b728a09b3ee19113760337973feb0b1bc126836a54dab9bf59c87c17f"}}