{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:AEYD3443SNYPSST4GCMFQP6JLE","short_pith_number":"pith:AEYD3443","canonical_record":{"source":{"id":"0906.3557","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-06-19T00:49:49Z","cross_cats_sorted":[],"title_canon_sha256":"7f188c85f7d464e3a0090f25396301c86ebf270573948cb2770254ce7567c97d","abstract_canon_sha256":"2fcd6b8398e6b44feeae83bed35a37e0a2e0d0e479ab2fa39a41c04078652791"},"schema_version":"1.0"},"canonical_sha256":"01303df39b9370f94a7c3098583fc95901d9aa544c394d35f4c936db56fc4ab0","source":{"kind":"arxiv","id":"0906.3557","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3557","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3557v1","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3557","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"pith_short_12","alias_value":"AEYD3443SNYP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"AEYD3443SNYPSST4","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"AEYD3443","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:AEYD3443SNYPSST4GCMFQP6JLE","target":"record","payload":{"canonical_record":{"source":{"id":"0906.3557","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-06-19T00:49:49Z","cross_cats_sorted":[],"title_canon_sha256":"7f188c85f7d464e3a0090f25396301c86ebf270573948cb2770254ce7567c97d","abstract_canon_sha256":"2fcd6b8398e6b44feeae83bed35a37e0a2e0d0e479ab2fa39a41c04078652791"},"schema_version":"1.0"},"canonical_sha256":"01303df39b9370f94a7c3098583fc95901d9aa544c394d35f4c936db56fc4ab0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:18.929400Z","signature_b64":"Wpb43EDOPJHjwHFF+Linf6v/kHJH3CIs+o29R9DlThciXoTjrRnF7FCVfmUQLQue9gVzkGws6PQlWQ4desxIAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01303df39b9370f94a7c3098583fc95901d9aa544c394d35f4c936db56fc4ab0","last_reissued_at":"2026-05-18T02:13:18.928662Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:18.928662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.3557","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":"2026-05-18T02:13:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P2Z4XRB6YzQHzVpOuZImhlE3+EYVqyZnvTmbRb8zdBwjVMLNhntNykbo4XWQMIadSyUBe3fgPbPyB5zR6ZvwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T06:24:33.679346Z"},"content_sha256":"e73b905dfd9d5bb561f92c501d2960679fea2e4c64fa24628b2006dfbf84d261","schema_version":"1.0","event_id":"sha256:e73b905dfd9d5bb561f92c501d2960679fea2e4c64fa24628b2006dfbf84d261"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:AEYD3443SNYPSST4GCMFQP6JLE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Revised Characterization of the WFPC2 CTE Loss","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Andrew E. Dolphin","submitted_at":"2009-06-19T00:49:49Z","abstract_excerpt":"Charge-transfer loss on the Wide Field Planetary Camera 2 (WFPC2) onboard the Hubble Space Telescope is a primary source of uncertainty in stellar photometry obtained with this camera. This effect, discovered shortly after the camera was installed, has grown over time and can dim stars by several tenths of a magnitude (or even more, in particularly bad cases). The impact of CTE loss on WFPC2 stellar photometry was characterized by several studies between 1998 and 2000, but has received diminished attention since ACS became HST's primary imager. After the failure of ACS in January 2007, WFPC2 o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3557","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":"2026-05-18T02:13:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yDCx1XlxDHD6Gy0h0pyCqAUG/pmXMCb6rjXulRtg2P/vL9e+nO953UcfXZ3P1hPfGnUUldHdVgxPvf/WFhATDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T06:24:33.679972Z"},"content_sha256":"82e9a65b97b46c9c462a95de5920e448153878693a99d92b3729a0ffaed427d8","schema_version":"1.0","event_id":"sha256:82e9a65b97b46c9c462a95de5920e448153878693a99d92b3729a0ffaed427d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AEYD3443SNYPSST4GCMFQP6JLE/bundle.json","state_url":"https://pith.science/pith/AEYD3443SNYPSST4GCMFQP6JLE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AEYD3443SNYPSST4GCMFQP6JLE/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":"2026-06-12T06:24:33Z","links":{"resolver":"https://pith.science/pith/AEYD3443SNYPSST4GCMFQP6JLE","bundle":"https://pith.science/pith/AEYD3443SNYPSST4GCMFQP6JLE/bundle.json","state":"https://pith.science/pith/AEYD3443SNYPSST4GCMFQP6JLE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AEYD3443SNYPSST4GCMFQP6JLE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:AEYD3443SNYPSST4GCMFQP6JLE","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":"2fcd6b8398e6b44feeae83bed35a37e0a2e0d0e479ab2fa39a41c04078652791","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-06-19T00:49:49Z","title_canon_sha256":"7f188c85f7d464e3a0090f25396301c86ebf270573948cb2770254ce7567c97d"},"schema_version":"1.0","source":{"id":"0906.3557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3557","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3557v1","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3557","created_at":"2026-05-18T02:13:18Z"},{"alias_kind":"pith_short_12","alias_value":"AEYD3443SNYP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"AEYD3443SNYPSST4","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"AEYD3443","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:82e9a65b97b46c9c462a95de5920e448153878693a99d92b3729a0ffaed427d8","target":"graph","created_at":"2026-05-18T02:13:18Z","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":"Charge-transfer loss on the Wide Field Planetary Camera 2 (WFPC2) onboard the Hubble Space Telescope is a primary source of uncertainty in stellar photometry obtained with this camera. This effect, discovered shortly after the camera was installed, has grown over time and can dim stars by several tenths of a magnitude (or even more, in particularly bad cases). The impact of CTE loss on WFPC2 stellar photometry was characterized by several studies between 1998 and 2000, but has received diminished attention since ACS became HST's primary imager. After the failure of ACS in January 2007, WFPC2 o","authors_text":"Andrew E. Dolphin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-06-19T00:49:49Z","title":"A Revised Characterization of the WFPC2 CTE Loss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3557","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:e73b905dfd9d5bb561f92c501d2960679fea2e4c64fa24628b2006dfbf84d261","target":"record","created_at":"2026-05-18T02:13:18Z","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":"2fcd6b8398e6b44feeae83bed35a37e0a2e0d0e479ab2fa39a41c04078652791","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-06-19T00:49:49Z","title_canon_sha256":"7f188c85f7d464e3a0090f25396301c86ebf270573948cb2770254ce7567c97d"},"schema_version":"1.0","source":{"id":"0906.3557","kind":"arxiv","version":1}},"canonical_sha256":"01303df39b9370f94a7c3098583fc95901d9aa544c394d35f4c936db56fc4ab0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01303df39b9370f94a7c3098583fc95901d9aa544c394d35f4c936db56fc4ab0","first_computed_at":"2026-05-18T02:13:18.928662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:18.928662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wpb43EDOPJHjwHFF+Linf6v/kHJH3CIs+o29R9DlThciXoTjrRnF7FCVfmUQLQue9gVzkGws6PQlWQ4desxIAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:18.929400Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.3557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e73b905dfd9d5bb561f92c501d2960679fea2e4c64fa24628b2006dfbf84d261","sha256:82e9a65b97b46c9c462a95de5920e448153878693a99d92b3729a0ffaed427d8"],"state_sha256":"5e1f1939508b769b6a2852b8aad46929412eec381005b5f431f7c46ba4df3553"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wzbdpCkEM8xGOLDjbohGcnvdpshdfNlucBNBZW7GWCPu7bG/DkYFiLNTczGUgX79aa38WjjX8cQIit9L8G5kDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T06:24:33.683502Z","bundle_sha256":"048f5cd8a7640335e0981beef97e2a99c72ab094db17e46368dd50e3e48a551b"}}