{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:WLOGA5R5CAEUOCORT7XRFTTEW2","short_pith_number":"pith:WLOGA5R5","canonical_record":{"source":{"id":"1605.03587","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-05-11T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"9652ad08236596237354d621bb128e5753db7151c6f34cd09789ea4b9e76399a","abstract_canon_sha256":"a26d64e6bc7015d7d7c24b2993c1ce59bb73f31b05cf4434b477bde27d3ddb8e"},"schema_version":"1.0"},"canonical_sha256":"b2dc60763d10094709d19fef12ce64b69efa6d7f8402957e5e8a3454b897d726","source":{"kind":"arxiv","id":"1605.03587","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03587","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03587v2","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03587","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"pith_short_12","alias_value":"WLOGA5R5CAEU","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"WLOGA5R5CAEUOCOR","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"WLOGA5R5","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:WLOGA5R5CAEUOCORT7XRFTTEW2","target":"record","payload":{"canonical_record":{"source":{"id":"1605.03587","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-05-11T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"9652ad08236596237354d621bb128e5753db7151c6f34cd09789ea4b9e76399a","abstract_canon_sha256":"a26d64e6bc7015d7d7c24b2993c1ce59bb73f31b05cf4434b477bde27d3ddb8e"},"schema_version":"1.0"},"canonical_sha256":"b2dc60763d10094709d19fef12ce64b69efa6d7f8402957e5e8a3454b897d726","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:44.311499Z","signature_b64":"NyOzjF0hLUU7tI1AyaGW2OONq/VMi4ez/ZD3FVFLwQrz5j576zQgU6Nz8i4A7Tt+02Q1PPAnCZjj24JanTK6Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2dc60763d10094709d19fef12ce64b69efa6d7f8402957e5e8a3454b897d726","last_reissued_at":"2026-05-18T01:11:44.311023Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:44.311023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.03587","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":"2026-05-18T01:11:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lSVR1+aMl+EtgPZ/gzyOux5SJmtXwAMVF4Sh/2rGgcuifMIJ3kX+pl7ydO5/lxzaXh1IWljW13BaHHg5DmQqDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:21:44.762518Z"},"content_sha256":"8fc04076b6845f123c56815474c3e4e32d486a0f43052d8e67764ac4274093e6","schema_version":"1.0","event_id":"sha256:8fc04076b6845f123c56815474c3e4e32d486a0f43052d8e67764ac4274093e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:WLOGA5R5CAEUOCORT7XRFTTEW2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep Herschel PACS point spread functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Abergel, M. Bocchio, S. Bianchi","submitted_at":"2016-05-11T20:00:02Z","abstract_excerpt":"The knowledge of the point spread function (PSF) of imaging instruments represents a fundamental requirement for astronomical observations. The Herschel PACS PSFs delivered by the instrument control centre are obtained from observations of the Vesta asteroid, providing a characterisation of the central part therefore excluding fainter features. However, in many cases information on both the core and the wings of the PSFs is needed. With this aim, we combine Vesta and Mars dedicated observations and obtain PACS PSFs with an unprecedented dynamic range $(\\sim 10^6)$, at slow and fast scan speeds"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03587","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":"2026-05-18T01:11:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5QHOjs9Z7Dpdf5kXSbfNAw3H3c+KBkVFL2b+nCHFtW0anFNWxMMe8tex0rrMYjXNBDlENm3xYnZAFIqExYAODA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T21:21:44.763251Z"},"content_sha256":"b6033236b9f5166a8f468d4477791af4d21bf8f9bd3a5f24bc8e287c3d2565dc","schema_version":"1.0","event_id":"sha256:b6033236b9f5166a8f468d4477791af4d21bf8f9bd3a5f24bc8e287c3d2565dc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/bundle.json","state_url":"https://pith.science/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/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":"2026-06-11T21:21:44Z","links":{"resolver":"https://pith.science/pith/WLOGA5R5CAEUOCORT7XRFTTEW2","bundle":"https://pith.science/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/bundle.json","state":"https://pith.science/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WLOGA5R5CAEUOCORT7XRFTTEW2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WLOGA5R5CAEUOCORT7XRFTTEW2","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":"a26d64e6bc7015d7d7c24b2993c1ce59bb73f31b05cf4434b477bde27d3ddb8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-05-11T20:00:02Z","title_canon_sha256":"9652ad08236596237354d621bb128e5753db7151c6f34cd09789ea4b9e76399a"},"schema_version":"1.0","source":{"id":"1605.03587","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03587","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03587v2","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03587","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"pith_short_12","alias_value":"WLOGA5R5CAEU","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"WLOGA5R5CAEUOCOR","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"WLOGA5R5","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:b6033236b9f5166a8f468d4477791af4d21bf8f9bd3a5f24bc8e287c3d2565dc","target":"graph","created_at":"2026-05-18T01:11:44Z","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 knowledge of the point spread function (PSF) of imaging instruments represents a fundamental requirement for astronomical observations. The Herschel PACS PSFs delivered by the instrument control centre are obtained from observations of the Vesta asteroid, providing a characterisation of the central part therefore excluding fainter features. However, in many cases information on both the core and the wings of the PSFs is needed. With this aim, we combine Vesta and Mars dedicated observations and obtain PACS PSFs with an unprecedented dynamic range $(\\sim 10^6)$, at slow and fast scan speeds","authors_text":"A. Abergel, M. Bocchio, S. Bianchi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-05-11T20:00:02Z","title":"Deep Herschel PACS point spread functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03587","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":"sha256:8fc04076b6845f123c56815474c3e4e32d486a0f43052d8e67764ac4274093e6","target":"record","created_at":"2026-05-18T01:11:44Z","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":"a26d64e6bc7015d7d7c24b2993c1ce59bb73f31b05cf4434b477bde27d3ddb8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-05-11T20:00:02Z","title_canon_sha256":"9652ad08236596237354d621bb128e5753db7151c6f34cd09789ea4b9e76399a"},"schema_version":"1.0","source":{"id":"1605.03587","kind":"arxiv","version":2}},"canonical_sha256":"b2dc60763d10094709d19fef12ce64b69efa6d7f8402957e5e8a3454b897d726","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2dc60763d10094709d19fef12ce64b69efa6d7f8402957e5e8a3454b897d726","first_computed_at":"2026-05-18T01:11:44.311023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:44.311023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NyOzjF0hLUU7tI1AyaGW2OONq/VMi4ez/ZD3FVFLwQrz5j576zQgU6Nz8i4A7Tt+02Q1PPAnCZjj24JanTK6Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:44.311499Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.03587","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fc04076b6845f123c56815474c3e4e32d486a0f43052d8e67764ac4274093e6","sha256:b6033236b9f5166a8f468d4477791af4d21bf8f9bd3a5f24bc8e287c3d2565dc"],"state_sha256":"4c546c9757bab0d5986727c0f0896829ec2ec6f1133e2120db78d03ec780dc99"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nYHPIQcVkRScm1e/H51hB8PG9poqiyHvUAjmLA+Gf2WXGm0ND00THUFO1+0hq/CTuT3cyxs7Erj12i9j2JEAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T21:21:44.767634Z","bundle_sha256":"7ac801b88ba63abfef245b55d9a107d84b2b5bc411b09f1976b3862b3aabecca"}}