{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:JEC6HX7VWC65GI3YMTKPMIFZ2M","short_pith_number":"pith:JEC6HX7V","canonical_record":{"source":{"id":"1306.0008","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-31T20:00:02Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"55cbc0ba16827cab18f2baba315bb87587406fc6ba08b030bb9e2522d22d219f","abstract_canon_sha256":"07c4828a7fa2cf52a5b48db946c1d0c008e975b7dae2692626e9abba8499b913"},"schema_version":"1.0"},"canonical_sha256":"4905e3dff5b0bdd3237864d4f620b9d31fc071461d2fe28004292ab2d447b547","source":{"kind":"arxiv","id":"1306.0008","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0008","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0008v1","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0008","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"pith_short_12","alias_value":"JEC6HX7VWC65","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JEC6HX7VWC65GI3Y","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JEC6HX7V","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:JEC6HX7VWC65GI3YMTKPMIFZ2M","target":"record","payload":{"canonical_record":{"source":{"id":"1306.0008","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-31T20:00:02Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"55cbc0ba16827cab18f2baba315bb87587406fc6ba08b030bb9e2522d22d219f","abstract_canon_sha256":"07c4828a7fa2cf52a5b48db946c1d0c008e975b7dae2692626e9abba8499b913"},"schema_version":"1.0"},"canonical_sha256":"4905e3dff5b0bdd3237864d4f620b9d31fc071461d2fe28004292ab2d447b547","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:22:04.889380Z","signature_b64":"fJrf5wnlvuUjdPT9UUM3iQulI43apGAbAjK08ikSVZOAD7BBNML6aDYekmTeJdMUHOFf74Wri1AtUzat7qsVDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4905e3dff5b0bdd3237864d4f620b9d31fc071461d2fe28004292ab2d447b547","last_reissued_at":"2026-05-18T03:22:04.888711Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:22:04.888711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.0008","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":"2026-05-18T03:22:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BT+M1SDC95o6ZwOZTEEa16E4W5sdHriG6p6mRLINSv2GyRdzHno0CJPU6oWmimJFheBmVBUzGAq+gp63OTYHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T22:43:50.134972Z"},"content_sha256":"407ce555e1bd04b9e068147f4d8bacfc3c240fbffe80a02ad8bb6833ecf16efa","schema_version":"1.0","event_id":"sha256:407ce555e1bd04b9e068147f4d8bacfc3c240fbffe80a02ad8bb6833ecf16efa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:JEC6HX7VWC65GI3YMTKPMIFZ2M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dust, Gas, and Metallicities of Cosmologically Distant Lens Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"Bin Chen, Christopher S. Kochanek, George Chartas, Xinyu Dai","submitted_at":"2013-05-31T20:00:02Z","abstract_excerpt":"We homogeneously analyzed the \\chandra\\ X-ray observations of 10 gravitational lenses, HE 0047-1756, QJ 0158-4325, SDSS 0246-0805, HE 0435-1223, SDSS 0924+0219, SDSS 1004+4112, HE 1104-1805, PG 1115+080, Q 1355-2257, and Q 2237+0305, to measure the differential X-ray absorption between images, the metallicity, and the dust-to-gas ratio of the lens galaxies. We detected differential absorption in all lenses except SDSS 0924+0219 and HE 1104-1805. This doubles the sample of dust-to-gas ratio measurements in cosmologically distant lens galaxies. We successfully measured the gas phase metallicity "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0008","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":"2026-05-18T03:22:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pwwbNyR0Rlt8Gp9qEoFo9Z7uWZp/Ti0U1PyB245QwWAAOOwQNU0hSchmP9efkJ/J92Enz6DVNqBafM5lp/AwAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T22:43:50.135376Z"},"content_sha256":"011a8a80d4e854ba858f2d829f9d6f43b755162def32e9aaaa59cc7d5caff924","schema_version":"1.0","event_id":"sha256:011a8a80d4e854ba858f2d829f9d6f43b755162def32e9aaaa59cc7d5caff924"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/bundle.json","state_url":"https://pith.science/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/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":"2026-06-04T22:43:50Z","links":{"resolver":"https://pith.science/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M","bundle":"https://pith.science/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/bundle.json","state":"https://pith.science/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JEC6HX7VWC65GI3YMTKPMIFZ2M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:JEC6HX7VWC65GI3YMTKPMIFZ2M","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":"07c4828a7fa2cf52a5b48db946c1d0c008e975b7dae2692626e9abba8499b913","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-31T20:00:02Z","title_canon_sha256":"55cbc0ba16827cab18f2baba315bb87587406fc6ba08b030bb9e2522d22d219f"},"schema_version":"1.0","source":{"id":"1306.0008","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0008","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0008v1","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0008","created_at":"2026-05-18T03:22:04Z"},{"alias_kind":"pith_short_12","alias_value":"JEC6HX7VWC65","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JEC6HX7VWC65GI3Y","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JEC6HX7V","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:011a8a80d4e854ba858f2d829f9d6f43b755162def32e9aaaa59cc7d5caff924","target":"graph","created_at":"2026-05-18T03:22:04Z","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 homogeneously analyzed the \\chandra\\ X-ray observations of 10 gravitational lenses, HE 0047-1756, QJ 0158-4325, SDSS 0246-0805, HE 0435-1223, SDSS 0924+0219, SDSS 1004+4112, HE 1104-1805, PG 1115+080, Q 1355-2257, and Q 2237+0305, to measure the differential X-ray absorption between images, the metallicity, and the dust-to-gas ratio of the lens galaxies. We detected differential absorption in all lenses except SDSS 0924+0219 and HE 1104-1805. This doubles the sample of dust-to-gas ratio measurements in cosmologically distant lens galaxies. We successfully measured the gas phase metallicity ","authors_text":"Bin Chen, Christopher S. Kochanek, George Chartas, Xinyu Dai","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-31T20:00:02Z","title":"Dust, Gas, and Metallicities of Cosmologically Distant Lens Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0008","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":"sha256:407ce555e1bd04b9e068147f4d8bacfc3c240fbffe80a02ad8bb6833ecf16efa","target":"record","created_at":"2026-05-18T03:22:04Z","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":"07c4828a7fa2cf52a5b48db946c1d0c008e975b7dae2692626e9abba8499b913","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-31T20:00:02Z","title_canon_sha256":"55cbc0ba16827cab18f2baba315bb87587406fc6ba08b030bb9e2522d22d219f"},"schema_version":"1.0","source":{"id":"1306.0008","kind":"arxiv","version":1}},"canonical_sha256":"4905e3dff5b0bdd3237864d4f620b9d31fc071461d2fe28004292ab2d447b547","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4905e3dff5b0bdd3237864d4f620b9d31fc071461d2fe28004292ab2d447b547","first_computed_at":"2026-05-18T03:22:04.888711Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:22:04.888711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fJrf5wnlvuUjdPT9UUM3iQulI43apGAbAjK08ikSVZOAD7BBNML6aDYekmTeJdMUHOFf74Wri1AtUzat7qsVDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:22:04.889380Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.0008","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:407ce555e1bd04b9e068147f4d8bacfc3c240fbffe80a02ad8bb6833ecf16efa","sha256:011a8a80d4e854ba858f2d829f9d6f43b755162def32e9aaaa59cc7d5caff924"],"state_sha256":"6679796948a1d1f238abe9546add3b3c5ff58a50de78097e20d0758148b25d4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xzz+YFf27HDXrXzFmGraOck90h4VqrZw9D+jn3ItCmnV5r7iFcT4c+7IWbdklJ1tg3AjwyV7eFmBy/3BHRelBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T22:43:50.137655Z","bundle_sha256":"85d88cbbffd595714e069a6ae8410a1a28d29b584d55b1ccd836166f01ef8b4a"}}