{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:75R7G5WPD7YBBQUF37Z5DBY5UW","short_pith_number":"pith:75R7G5WP","canonical_record":{"source":{"id":"0708.2988","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-22T10:41:30Z","cross_cats_sorted":[],"title_canon_sha256":"ff612a00d89d20a5ab791e0267eab37f1e94b86a99743c27e4d206654d26f477","abstract_canon_sha256":"3c780f0ccac651f9bb101c1998f67a28bb72f0a499b8e8cc9537c4e1ed2f5b67"},"schema_version":"1.0"},"canonical_sha256":"ff63f376cf1ff010c285dff3d1871da5b4e4c932a63b6252188adc522acdb9bc","source":{"kind":"arxiv","id":"0708.2988","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2988","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2988v1","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2988","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_12","alias_value":"75R7G5WPD7YB","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_16","alias_value":"75R7G5WPD7YBBQUF","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_8","alias_value":"75R7G5WP","created_at":"2026-07-04T17:05:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:75R7G5WPD7YBBQUF37Z5DBY5UW","target":"record","payload":{"canonical_record":{"source":{"id":"0708.2988","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-22T10:41:30Z","cross_cats_sorted":[],"title_canon_sha256":"ff612a00d89d20a5ab791e0267eab37f1e94b86a99743c27e4d206654d26f477","abstract_canon_sha256":"3c780f0ccac651f9bb101c1998f67a28bb72f0a499b8e8cc9537c4e1ed2f5b67"},"schema_version":"1.0"},"canonical_sha256":"ff63f376cf1ff010c285dff3d1871da5b4e4c932a63b6252188adc522acdb9bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:05:17.791372Z","signature_b64":"P21YcF4LoKH8o7mqcGBdFqqDpquPZm3eqSeLbHRaQKaBUfhxAWsBafYWtAqDyZ33ChYlQ9oNL0Am2OLFlzzHDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff63f376cf1ff010c285dff3d1871da5b4e4c932a63b6252188adc522acdb9bc","last_reissued_at":"2026-07-04T17:05:17.790966Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:05:17.790966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0708.2988","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":"2026-07-04T17:05:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hZ2+fN2+Pq1Ih42V0hsAWlmd4Tmq0ugR/8PZFAYSQZYIoxzlOVHP84wt8YPztaQNugu6Hspp3dpeq2e7WLEJAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:39:57.765566Z"},"content_sha256":"ed3b796c026418908edce702cb60982fec44f441cc625da83b55164c48c93968","schema_version":"1.0","event_id":"sha256:ed3b796c026418908edce702cb60982fec44f441cc625da83b55164c48c93968"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:75R7G5WPD7YBBQUF37Z5DBY5UW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The in-flight spectroscopic performance of the Swift XRT CCD camera during 2006-2007","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. A. Wells, A. F. Abbey, A. Moretti, A. P. Beardmore, C. Pagani, D. N. Burrows, F. Tamburelli, G. Chincarini, G. Cusumano, G. Tagliaferri, J. A. Nousek, J. E. Hill, J. Kennea, J. P. Osborne, K. L. Page, L. Angelini, L. Tyler, M. Capalbi, M. Perri, O. Citterio, O. Godet, P. Evans, P. Giommi, P. Romano, R. Starling, S. Campana, T. Mineo, V. LaParola, V. Mangano","submitted_at":"2007-08-22T10:41:30Z","abstract_excerpt":"The Swift X-ray Telescope focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 135 eV FWHM at 5.9 keV as measured before launch. We describe the CCD calibration program based on celestial and on-board calibration sources, relevant in-flight experiences, and developments in the CCD response model. We illustrate how the revised response model describes the calibration sources well. Comparison of observed spectra with models folded through the instrument response produces negative residuals around and below the Oxygen edge. We discuss several possible causes "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2988","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0708.2988/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":"2026-07-04T17:05:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UMD2pRWA+MWPaLZP8jvGerhfS0IHsfXrjpcrmvg60mo9nqERcQCsfRo4zgmIldxbFgLk5hqtGOla/ndPhcFSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:39:57.766083Z"},"content_sha256":"d123862beaa223e477538cbaa759b82021a91f9d5767a8057b5b9213d659807c","schema_version":"1.0","event_id":"sha256:d123862beaa223e477538cbaa759b82021a91f9d5767a8057b5b9213d659807c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/bundle.json","state_url":"https://pith.science/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/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":"2026-08-03T18:39:57Z","links":{"resolver":"https://pith.science/pith/75R7G5WPD7YBBQUF37Z5DBY5UW","bundle":"https://pith.science/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/bundle.json","state":"https://pith.science/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/75R7G5WPD7YBBQUF37Z5DBY5UW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:75R7G5WPD7YBBQUF37Z5DBY5UW","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":"3c780f0ccac651f9bb101c1998f67a28bb72f0a499b8e8cc9537c4e1ed2f5b67","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-22T10:41:30Z","title_canon_sha256":"ff612a00d89d20a5ab791e0267eab37f1e94b86a99743c27e4d206654d26f477"},"schema_version":"1.0","source":{"id":"0708.2988","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.2988","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"arxiv_version","alias_value":"0708.2988v1","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.2988","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_12","alias_value":"75R7G5WPD7YB","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_16","alias_value":"75R7G5WPD7YBBQUF","created_at":"2026-07-04T17:05:17Z"},{"alias_kind":"pith_short_8","alias_value":"75R7G5WP","created_at":"2026-07-04T17:05:17Z"}],"graph_snapshots":[{"event_id":"sha256:d123862beaa223e477538cbaa759b82021a91f9d5767a8057b5b9213d659807c","target":"graph","created_at":"2026-07-04T17:05:17Z","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/0708.2988/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Swift X-ray Telescope focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 135 eV FWHM at 5.9 keV as measured before launch. We describe the CCD calibration program based on celestial and on-board calibration sources, relevant in-flight experiences, and developments in the CCD response model. We illustrate how the revised response model describes the calibration sources well. Comparison of observed spectra with models folded through the instrument response produces negative residuals around and below the Oxygen edge. We discuss several possible causes ","authors_text":"A. A. Wells, A. F. Abbey, A. Moretti, A. P. Beardmore, C. Pagani, D. N. Burrows, F. Tamburelli, G. Chincarini, G. Cusumano, G. Tagliaferri, J. A. Nousek, J. E. Hill, J. Kennea, J. P. Osborne, K. L. Page, L. Angelini, L. Tyler, M. Capalbi, M. Perri, O. Citterio, O. Godet, P. Evans, P. Giommi, P. Romano, R. Starling, S. Campana, T. Mineo, V. LaParola, V. Mangano","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-08-22T10:41:30Z","title":"The in-flight spectroscopic performance of the Swift XRT CCD camera during 2006-2007"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.2988","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:ed3b796c026418908edce702cb60982fec44f441cc625da83b55164c48c93968","target":"record","created_at":"2026-07-04T17:05:17Z","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":"3c780f0ccac651f9bb101c1998f67a28bb72f0a499b8e8cc9537c4e1ed2f5b67","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-08-22T10:41:30Z","title_canon_sha256":"ff612a00d89d20a5ab791e0267eab37f1e94b86a99743c27e4d206654d26f477"},"schema_version":"1.0","source":{"id":"0708.2988","kind":"arxiv","version":1}},"canonical_sha256":"ff63f376cf1ff010c285dff3d1871da5b4e4c932a63b6252188adc522acdb9bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff63f376cf1ff010c285dff3d1871da5b4e4c932a63b6252188adc522acdb9bc","first_computed_at":"2026-07-04T17:05:17.790966Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:05:17.790966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P21YcF4LoKH8o7mqcGBdFqqDpquPZm3eqSeLbHRaQKaBUfhxAWsBafYWtAqDyZ33ChYlQ9oNL0Am2OLFlzzHDg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:05:17.791372Z","signed_message":"canonical_sha256_bytes"},"source_id":"0708.2988","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed3b796c026418908edce702cb60982fec44f441cc625da83b55164c48c93968","sha256:d123862beaa223e477538cbaa759b82021a91f9d5767a8057b5b9213d659807c"],"state_sha256":"3786f04925fe49889d2ad937d730d020d7b1ead3f8c0c7b2ec501041c9653b4b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WZcU6N85Eu60XuAYN2jrm/4j5Lv1+2dNqFv92cbM0g3fHeV2kXsLv1tGkd1wN/Vv6aqMkPbSF2fP5PLFyRTrAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:39:57.769872Z","bundle_sha256":"785889ab9747600122a19f4c4ea491daad9b7ac81e38ee36c73e75d2e0ca8240"}}