{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3WKDFBV5BQAL5GYROCY4NMIVR3","short_pith_number":"pith:3WKDFBV5","canonical_record":{"source":{"id":"1606.08672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-06-28T12:22:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ec4eb94d39ac51883ece5a426e506cd085d6f24658491668b346ab355d4c1535","abstract_canon_sha256":"1e49159f415cfaa70e9570e032f0528f2c421d37106c2ec3646fda0b97561a85"},"schema_version":"1.0"},"canonical_sha256":"dd943286bd0c00be9b1170b1c6b1158ed52c5dcde4869ab6dc1790c836b1f4fc","source":{"kind":"arxiv","id":"1606.08672","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.08672","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"1606.08672v1","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.08672","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"3WKDFBV5BQAL","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"3WKDFBV5BQAL5GYR","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"3WKDFBV5","created_at":"2026-05-18T12:29:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3WKDFBV5BQAL5GYROCY4NMIVR3","target":"record","payload":{"canonical_record":{"source":{"id":"1606.08672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-06-28T12:22:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ec4eb94d39ac51883ece5a426e506cd085d6f24658491668b346ab355d4c1535","abstract_canon_sha256":"1e49159f415cfaa70e9570e032f0528f2c421d37106c2ec3646fda0b97561a85"},"schema_version":"1.0"},"canonical_sha256":"dd943286bd0c00be9b1170b1c6b1158ed52c5dcde4869ab6dc1790c836b1f4fc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:47.307172Z","signature_b64":"NLxbrwDpvLYvjEKMQd1rSoUvUIVlzTc6yroUmNOpXjUr9mXIUqsmmArM+HVs6NGwmcUyqBlavl5F+i7CcFsICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd943286bd0c00be9b1170b1c6b1158ed52c5dcde4869ab6dc1790c836b1f4fc","last_reissued_at":"2026-05-18T01:11:47.306840Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:47.306840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.08672","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":"2026-05-18T01:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UHVBxn5wHwIDzBkemc2+oWnE5sAXAKMCU0CtsYXX22nS5t1inSlhiyndMC+WspcUk6morPmAy9KECbhWyJlAAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:48:11.443413Z"},"content_sha256":"eacdd5626aef8fa6beccb1a1d6d395f7bd673372530cea5cb592e0617a0fddd1","schema_version":"1.0","event_id":"sha256:eacdd5626aef8fa6beccb1a1d6d395f7bd673372530cea5cb592e0617a0fddd1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3WKDFBV5BQAL5GYROCY4NMIVR3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"All NIRspec needs is HST/WFC3 pre-imaging? The use of Milky Way Stars in WFC3 Imaging to Register NIRspec MSA Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Australia), B.W. Holwerda (1), M.A. Kenworthy (1) ((1) University of Leiden, M. Trenti (2), Niels Bohrweg, NL-2333 CA Leiden, R. J. Bouwens (1), Sterrenwacht Leiden, The Netherlands (2) School of Physics, University of Melbourne, VIC 3010","submitted_at":"2016-06-28T12:22:27Z","abstract_excerpt":"The James Webb Space Telescope (JWST) will be an exquisite new near-infrared observatory with imaging and multi-object spectroscopy through ESA's NIRspec instrument with its unique Micro-Shutter Array (MSA), allowing for slits to be positioned on astronomical targets by opening specific 0.002\"-wide micro shutter doors.\n  To ensure proper target acquisition, the on-sky position of the MSA needs to be verified before spectroscopic observations start. An onboard centroiding program registers the position of pre-identified guide stars in a Target Acquisition (TA) image, a short pre-spectroscopy ex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.08672","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":"2026-05-18T01:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VQPks/tlKSHOhWUVIvb9nuiRxVzoHAW3BmznatVodWNMBD8kwwvStFsquAc4tf9HF6VEubMGIrbDzhIF1JJPCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:48:11.444093Z"},"content_sha256":"4668adba76bd2f9ac1593023132c422417da880e8e6c8950adc02ec867d3fba0","schema_version":"1.0","event_id":"sha256:4668adba76bd2f9ac1593023132c422417da880e8e6c8950adc02ec867d3fba0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/bundle.json","state_url":"https://pith.science/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/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":"2026-05-26T02:48:11Z","links":{"resolver":"https://pith.science/pith/3WKDFBV5BQAL5GYROCY4NMIVR3","bundle":"https://pith.science/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/bundle.json","state":"https://pith.science/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3WKDFBV5BQAL5GYROCY4NMIVR3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3WKDFBV5BQAL5GYROCY4NMIVR3","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":"1e49159f415cfaa70e9570e032f0528f2c421d37106c2ec3646fda0b97561a85","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-06-28T12:22:27Z","title_canon_sha256":"ec4eb94d39ac51883ece5a426e506cd085d6f24658491668b346ab355d4c1535"},"schema_version":"1.0","source":{"id":"1606.08672","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.08672","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"1606.08672v1","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.08672","created_at":"2026-05-18T01:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"3WKDFBV5BQAL","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"3WKDFBV5BQAL5GYR","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"3WKDFBV5","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:4668adba76bd2f9ac1593023132c422417da880e8e6c8950adc02ec867d3fba0","target":"graph","created_at":"2026-05-18T01:11:47Z","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 James Webb Space Telescope (JWST) will be an exquisite new near-infrared observatory with imaging and multi-object spectroscopy through ESA's NIRspec instrument with its unique Micro-Shutter Array (MSA), allowing for slits to be positioned on astronomical targets by opening specific 0.002\"-wide micro shutter doors.\n  To ensure proper target acquisition, the on-sky position of the MSA needs to be verified before spectroscopic observations start. An onboard centroiding program registers the position of pre-identified guide stars in a Target Acquisition (TA) image, a short pre-spectroscopy ex","authors_text":"Australia), B.W. Holwerda (1), M.A. Kenworthy (1) ((1) University of Leiden, M. Trenti (2), Niels Bohrweg, NL-2333 CA Leiden, R. J. Bouwens (1), Sterrenwacht Leiden, The Netherlands (2) School of Physics, University of Melbourne, VIC 3010","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-06-28T12:22:27Z","title":"All NIRspec needs is HST/WFC3 pre-imaging? The use of Milky Way Stars in WFC3 Imaging to Register NIRspec MSA Observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.08672","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:eacdd5626aef8fa6beccb1a1d6d395f7bd673372530cea5cb592e0617a0fddd1","target":"record","created_at":"2026-05-18T01:11:47Z","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":"1e49159f415cfaa70e9570e032f0528f2c421d37106c2ec3646fda0b97561a85","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-06-28T12:22:27Z","title_canon_sha256":"ec4eb94d39ac51883ece5a426e506cd085d6f24658491668b346ab355d4c1535"},"schema_version":"1.0","source":{"id":"1606.08672","kind":"arxiv","version":1}},"canonical_sha256":"dd943286bd0c00be9b1170b1c6b1158ed52c5dcde4869ab6dc1790c836b1f4fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd943286bd0c00be9b1170b1c6b1158ed52c5dcde4869ab6dc1790c836b1f4fc","first_computed_at":"2026-05-18T01:11:47.306840Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:47.306840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NLxbrwDpvLYvjEKMQd1rSoUvUIVlzTc6yroUmNOpXjUr9mXIUqsmmArM+HVs6NGwmcUyqBlavl5F+i7CcFsICQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:47.307172Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.08672","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eacdd5626aef8fa6beccb1a1d6d395f7bd673372530cea5cb592e0617a0fddd1","sha256:4668adba76bd2f9ac1593023132c422417da880e8e6c8950adc02ec867d3fba0"],"state_sha256":"822d83924d2f0ac5858e16fdefbacf574b9192d48a1e823de829d2c6eac92876"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vJ/citojZn4KkCDc6JXiBTPUo3HF69XhdKSRSarhvMYxljnUsn3+C9BnPMbZtGRRPS0SlSK4j4AiL+iJuIiRAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:48:11.447513Z","bundle_sha256":"4156980a56d8ad4243a30339324bb7d67979b09a0d358ee1e1b5ad72e357c115"}}