{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:DPVJVKEFLN5GBX4UZ46L3AFVXQ","short_pith_number":"pith:DPVJVKEF","canonical_record":{"source":{"id":"1702.01079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-03T17:02:52Z","cross_cats_sorted":[],"title_canon_sha256":"3f1b5e8fa58f705fc3a54aa5697bc83ca8f3312c6ad373227712500c3ed27e02","abstract_canon_sha256":"ef4ad07d3a17dc2f4164b9b875d09f5c1280bbf66ce6ef48377ffcd2d6a22491"},"schema_version":"1.0"},"canonical_sha256":"1bea9aa8855b7a60df94cf3cbd80b5bc2f9bc0f9272ee2ebee7da351344e4a6b","source":{"kind":"arxiv","id":"1702.01079","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.01079","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"1702.01079v1","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.01079","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"DPVJVKEFLN5G","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"DPVJVKEFLN5GBX4U","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"DPVJVKEF","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:DPVJVKEFLN5GBX4UZ46L3AFVXQ","target":"record","payload":{"canonical_record":{"source":{"id":"1702.01079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-03T17:02:52Z","cross_cats_sorted":[],"title_canon_sha256":"3f1b5e8fa58f705fc3a54aa5697bc83ca8f3312c6ad373227712500c3ed27e02","abstract_canon_sha256":"ef4ad07d3a17dc2f4164b9b875d09f5c1280bbf66ce6ef48377ffcd2d6a22491"},"schema_version":"1.0"},"canonical_sha256":"1bea9aa8855b7a60df94cf3cbd80b5bc2f9bc0f9272ee2ebee7da351344e4a6b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:29.004931Z","signature_b64":"+3tDSqTalSaYe2tIRpSMvntW8fyfeXoDXnr0mecN5wymaPAuz/jhGGWPox15IZPPDy6RhB4qMl8jrqL5yKdXDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1bea9aa8855b7a60df94cf3cbd80b5bc2f9bc0f9272ee2ebee7da351344e4a6b","last_reissued_at":"2026-05-18T00:51:29.004165Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:29.004165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.01079","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":"2026-05-18T00:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cvDV3DpOcRCCuGuIHtVMyP7KCVBysJoyup+ZOAKj4MzF69LmODMko1W60Ug7uk1UbodNX4Veq3oQwrCWUFWMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:26:40.332603Z"},"content_sha256":"65806c00eb3de135097d348086ada7bdff6af6b14177e709eaecc17693f367c6","schema_version":"1.0","event_id":"sha256:65806c00eb3de135097d348086ada7bdff6af6b14177e709eaecc17693f367c6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:DPVJVKEFLN5GBX4UZ46L3AFVXQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Wide Field Imager Instrument for Athena","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Arne Rau, Daniel Pietschner, Josef Eder, Kirpal Nandra, Markus Plattner, Norbert Meidinger, Rafael Strecker, Tanja Eraerds","submitted_at":"2017-02-03T17:02:52Z","abstract_excerpt":"The WFI (Wide Field Imager) instrument is planned to be one of two complementary focal plane cameras on ESA's next X-ray observatory Athena. It combines unprecedented survey power through its large field of view of 40 amin x 40 amin together with excellent count rate capability (larger than 1 Crab). The energy resolution of the silicon sensor is state-of-the-art in the energy band of interest from 0.2 keV to 15 keV, e.g. the full width at half maximum of a line at 7 keV will be better than 170 eV until the end of the nominal mission phase. This performance is accomplished by using DEPFET activ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.01079","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":"2026-05-18T00:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"++cjbFwFXeCk/3frHSn+qcMGZb93w7QLvyFrXwkQoYPhYGbkjE1rJMUArDx8kAwjGy7As8cV76cjTOTjHdq1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:26:40.332951Z"},"content_sha256":"1886ac7b98e688c7b48e21f4fb0bad56b81403455c2fdac42d918e7fe5683251","schema_version":"1.0","event_id":"sha256:1886ac7b98e688c7b48e21f4fb0bad56b81403455c2fdac42d918e7fe5683251"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/bundle.json","state_url":"https://pith.science/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/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":"2026-05-31T10:26:40Z","links":{"resolver":"https://pith.science/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ","bundle":"https://pith.science/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/bundle.json","state":"https://pith.science/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DPVJVKEFLN5GBX4UZ46L3AFVXQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:DPVJVKEFLN5GBX4UZ46L3AFVXQ","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":"ef4ad07d3a17dc2f4164b9b875d09f5c1280bbf66ce6ef48377ffcd2d6a22491","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-03T17:02:52Z","title_canon_sha256":"3f1b5e8fa58f705fc3a54aa5697bc83ca8f3312c6ad373227712500c3ed27e02"},"schema_version":"1.0","source":{"id":"1702.01079","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.01079","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"1702.01079v1","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.01079","created_at":"2026-05-18T00:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"DPVJVKEFLN5G","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"DPVJVKEFLN5GBX4U","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"DPVJVKEF","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:1886ac7b98e688c7b48e21f4fb0bad56b81403455c2fdac42d918e7fe5683251","target":"graph","created_at":"2026-05-18T00:51:29Z","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 WFI (Wide Field Imager) instrument is planned to be one of two complementary focal plane cameras on ESA's next X-ray observatory Athena. It combines unprecedented survey power through its large field of view of 40 amin x 40 amin together with excellent count rate capability (larger than 1 Crab). The energy resolution of the silicon sensor is state-of-the-art in the energy band of interest from 0.2 keV to 15 keV, e.g. the full width at half maximum of a line at 7 keV will be better than 170 eV until the end of the nominal mission phase. This performance is accomplished by using DEPFET activ","authors_text":"Arne Rau, Daniel Pietschner, Josef Eder, Kirpal Nandra, Markus Plattner, Norbert Meidinger, Rafael Strecker, Tanja Eraerds","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-03T17:02:52Z","title":"The Wide Field Imager Instrument for Athena"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.01079","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":"sha256:65806c00eb3de135097d348086ada7bdff6af6b14177e709eaecc17693f367c6","target":"record","created_at":"2026-05-18T00:51:29Z","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":"ef4ad07d3a17dc2f4164b9b875d09f5c1280bbf66ce6ef48377ffcd2d6a22491","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-03T17:02:52Z","title_canon_sha256":"3f1b5e8fa58f705fc3a54aa5697bc83ca8f3312c6ad373227712500c3ed27e02"},"schema_version":"1.0","source":{"id":"1702.01079","kind":"arxiv","version":1}},"canonical_sha256":"1bea9aa8855b7a60df94cf3cbd80b5bc2f9bc0f9272ee2ebee7da351344e4a6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1bea9aa8855b7a60df94cf3cbd80b5bc2f9bc0f9272ee2ebee7da351344e4a6b","first_computed_at":"2026-05-18T00:51:29.004165Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:29.004165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+3tDSqTalSaYe2tIRpSMvntW8fyfeXoDXnr0mecN5wymaPAuz/jhGGWPox15IZPPDy6RhB4qMl8jrqL5yKdXDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:29.004931Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.01079","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65806c00eb3de135097d348086ada7bdff6af6b14177e709eaecc17693f367c6","sha256:1886ac7b98e688c7b48e21f4fb0bad56b81403455c2fdac42d918e7fe5683251"],"state_sha256":"c9a7d0ec446174f436f15b5051c0bc4706335c5ad0387f050a32b80803cf9e3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BQqTXIOpLe42JUYRX5CqRy9XtamIhf1FZFLcGOuE8MyFFhndvljJwhYcpkg9CwIni6je/zmDbI0hxjKPdnB5BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:26:40.335251Z","bundle_sha256":"924d7c1f1bcedeecdf06ad8c80efffaca9409082bddb3e2573895c3f96b79c78"}}