{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:QWAXS3ACFH2I5S5N6MXJCZ2VUH","short_pith_number":"pith:QWAXS3AC","canonical_record":{"source":{"id":"1004.3325","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-20T00:02:04Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c6f3070f3490745e193b26eb1fdf560f543b69d3958aeb73a96a7005584c5477","abstract_canon_sha256":"d4fe76c7e421589fe566ec9c76f3f74f0df77c3bd56a3ae8ab0aba78ebf88b82"},"schema_version":"1.0"},"canonical_sha256":"8581796c0229f48ecbadf32e916755a1f87ec508bc6bbd2d42853fab3bfb17ac","source":{"kind":"arxiv","id":"1004.3325","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.3325","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"arxiv_version","alias_value":"1004.3325v2","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.3325","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"pith_short_12","alias_value":"QWAXS3ACFH2I","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"QWAXS3ACFH2I5S5N","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"QWAXS3AC","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:QWAXS3ACFH2I5S5N6MXJCZ2VUH","target":"record","payload":{"canonical_record":{"source":{"id":"1004.3325","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-20T00:02:04Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c6f3070f3490745e193b26eb1fdf560f543b69d3958aeb73a96a7005584c5477","abstract_canon_sha256":"d4fe76c7e421589fe566ec9c76f3f74f0df77c3bd56a3ae8ab0aba78ebf88b82"},"schema_version":"1.0"},"canonical_sha256":"8581796c0229f48ecbadf32e916755a1f87ec508bc6bbd2d42853fab3bfb17ac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:56.501810Z","signature_b64":"6GWjchmQrf4RjvLZyOBE6zKQX6EDdI1xfDfoMb3jLsIbdiSqZiZhxhE/I/UczCHFRllNW7xScSAn11dj5De1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8581796c0229f48ecbadf32e916755a1f87ec508bc6bbd2d42853fab3bfb17ac","last_reissued_at":"2026-05-18T02:07:56.501063Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:56.501063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.3325","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":"2026-05-18T02:07:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k9px0swrj6aNQJi66SKCihQVCXjOpKMovJh7xogNIGcNuercWe71WsbZ7dSTPK1UUl78SypDs4kl9BjDe+sSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:34:54.222424Z"},"content_sha256":"be5fefe376a059451e3b81c64dcb51a7a37e2cb9b791a18608c8bbc6cde76b5b","schema_version":"1.0","event_id":"sha256:be5fefe376a059451e3b81c64dcb51a7a37e2cb9b791a18608c8bbc6cde76b5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:QWAXS3ACFH2I5S5N6MXJCZ2VUH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wavelength Calibration of the VLT-UVES Spectrograph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Jonathan B. Whitmore, Kim Griest, Michael T. Murphy","submitted_at":"2010-04-20T00:02:04Z","abstract_excerpt":"We attempt to measure possible miscalibration of the wavelength scale of the VLT-UVES spectrograph. We take spectra of QSO HE0515-4414 through the UVES iodine cell which contains thousands of well-calibrated iodine lines and compare these lines to the wavelength scale from the standard thorium-argon pipeline calibration. Analyzing three exposures of this z = 1.71 QSO, we find two distinct types of calibration shifts needed to correct the Th/Ar wavelength scale. First, there is an overall average velocity shift of between 100 m/s and 500 m/s depending upon the exposure. Second, within a given e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3325","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":"2026-05-18T02:07:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xOFGXEht/+zncs/F1ktFJOXLJPtGI1IvYd09xp2rGZr8nAKiEZt+vC1vJDSx0k5bZpKIpcLSps0osnjxcGF/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:34:54.223089Z"},"content_sha256":"46b35f8eeabeb3f73a017e3859359da37288668da5ae6b6d1102c03ac33e9bda","schema_version":"1.0","event_id":"sha256:46b35f8eeabeb3f73a017e3859359da37288668da5ae6b6d1102c03ac33e9bda"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/bundle.json","state_url":"https://pith.science/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/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":"2026-05-27T02:34:54Z","links":{"resolver":"https://pith.science/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH","bundle":"https://pith.science/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/bundle.json","state":"https://pith.science/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QWAXS3ACFH2I5S5N6MXJCZ2VUH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:QWAXS3ACFH2I5S5N6MXJCZ2VUH","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":"d4fe76c7e421589fe566ec9c76f3f74f0df77c3bd56a3ae8ab0aba78ebf88b82","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-20T00:02:04Z","title_canon_sha256":"c6f3070f3490745e193b26eb1fdf560f543b69d3958aeb73a96a7005584c5477"},"schema_version":"1.0","source":{"id":"1004.3325","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.3325","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"arxiv_version","alias_value":"1004.3325v2","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.3325","created_at":"2026-05-18T02:07:56Z"},{"alias_kind":"pith_short_12","alias_value":"QWAXS3ACFH2I","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"QWAXS3ACFH2I5S5N","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"QWAXS3AC","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:46b35f8eeabeb3f73a017e3859359da37288668da5ae6b6d1102c03ac33e9bda","target":"graph","created_at":"2026-05-18T02:07:56Z","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 attempt to measure possible miscalibration of the wavelength scale of the VLT-UVES spectrograph. We take spectra of QSO HE0515-4414 through the UVES iodine cell which contains thousands of well-calibrated iodine lines and compare these lines to the wavelength scale from the standard thorium-argon pipeline calibration. Analyzing three exposures of this z = 1.71 QSO, we find two distinct types of calibration shifts needed to correct the Th/Ar wavelength scale. First, there is an overall average velocity shift of between 100 m/s and 500 m/s depending upon the exposure. Second, within a given e","authors_text":"Jonathan B. Whitmore, Kim Griest, Michael T. Murphy","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-20T00:02:04Z","title":"Wavelength Calibration of the VLT-UVES Spectrograph"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3325","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:be5fefe376a059451e3b81c64dcb51a7a37e2cb9b791a18608c8bbc6cde76b5b","target":"record","created_at":"2026-05-18T02:07:56Z","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":"d4fe76c7e421589fe566ec9c76f3f74f0df77c3bd56a3ae8ab0aba78ebf88b82","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-04-20T00:02:04Z","title_canon_sha256":"c6f3070f3490745e193b26eb1fdf560f543b69d3958aeb73a96a7005584c5477"},"schema_version":"1.0","source":{"id":"1004.3325","kind":"arxiv","version":2}},"canonical_sha256":"8581796c0229f48ecbadf32e916755a1f87ec508bc6bbd2d42853fab3bfb17ac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8581796c0229f48ecbadf32e916755a1f87ec508bc6bbd2d42853fab3bfb17ac","first_computed_at":"2026-05-18T02:07:56.501063Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:56.501063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6GWjchmQrf4RjvLZyOBE6zKQX6EDdI1xfDfoMb3jLsIbdiSqZiZhxhE/I/UczCHFRllNW7xScSAn11dj5De1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:56.501810Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.3325","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be5fefe376a059451e3b81c64dcb51a7a37e2cb9b791a18608c8bbc6cde76b5b","sha256:46b35f8eeabeb3f73a017e3859359da37288668da5ae6b6d1102c03ac33e9bda"],"state_sha256":"fbc83cfca76a6efefd6cb82f5db4cfd5a96a788b12bd351461a0e6af2106c8f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fLDjKCtPB9JJT0mYuSxz3p6zg3YYhxUJ9SNzrxxmwRSYouyGmJAC5nmf10yFjuRnmlbL2Ax33Lrpb9xZsQ8nCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T02:34:54.226518Z","bundle_sha256":"012f389835ea397bed5f1ae0d03f4cd527fe6b57ff1168e75dcf5148b4ea4825"}}