{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:S65K4SXWFOMEJJLQC5OP6LZR6U","short_pith_number":"pith:S65K4SXW","canonical_record":{"source":{"id":"1503.06528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-23T04:46:11Z","cross_cats_sorted":[],"title_canon_sha256":"b0303cd2c4ca8cb7efb74c059091e788ddd524921318b63ed2832efc8e3be97e","abstract_canon_sha256":"b4082430ab4ed5e1d7086e4fa4070e08b41a2e2432a0a124b9891fda72723dcc"},"schema_version":"1.0"},"canonical_sha256":"97baae4af62b9844a570175cff2f31f52d551c98fb7a64df0ff8e2d897c717d5","source":{"kind":"arxiv","id":"1503.06528","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.06528","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1503.06528v1","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.06528","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"S65K4SXWFOME","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S65K4SXWFOMEJJLQ","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S65K4SXW","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:S65K4SXWFOMEJJLQC5OP6LZR6U","target":"record","payload":{"canonical_record":{"source":{"id":"1503.06528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-23T04:46:11Z","cross_cats_sorted":[],"title_canon_sha256":"b0303cd2c4ca8cb7efb74c059091e788ddd524921318b63ed2832efc8e3be97e","abstract_canon_sha256":"b4082430ab4ed5e1d7086e4fa4070e08b41a2e2432a0a124b9891fda72723dcc"},"schema_version":"1.0"},"canonical_sha256":"97baae4af62b9844a570175cff2f31f52d551c98fb7a64df0ff8e2d897c717d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:20:38.129744Z","signature_b64":"B7AHwZN/a/4LS1avclEElbOw4bGG+Lut4iN/zVHFAtJAbhCch7K/ae1xFtkMaqXlwWAfCZmdnXoyenbu2FsBBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"97baae4af62b9844a570175cff2f31f52d551c98fb7a64df0ff8e2d897c717d5","last_reissued_at":"2026-05-18T02:20:38.129072Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:20:38.129072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.06528","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":"2026-05-18T02:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gJNH5azf+0jNBKUledZ+OUNsXJsWxy9tfEy+TTZ5w0+4aSKtOOFxfAkrntTFjha+ORoNSVxZhhQKavbChs+rAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:21:48.556729Z"},"content_sha256":"8c63d35cd750864b0b74f33255919eb4875ec203956b33a38c84f6471b32d3d7","schema_version":"1.0","event_id":"sha256:8c63d35cd750864b0b74f33255919eb4875ec203956b33a38c84f6471b32d3d7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:S65K4SXWFOMEJJLQC5OP6LZR6U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"WSPEC: A Waveguide Filter Bank Spectrometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Bradley Johnson, Christopher Groppi, Daniel Flanigan, George Che, Glenn Jones, Heather McCarrick, Matthew Underhill, Peter Day, Philip Mauskopf, Sean Bryan","submitted_at":"2015-03-23T04:46:11Z","abstract_excerpt":"We have designed, fabricated, and measured a 5-channel prototype spectrometer pixel operating in the WR10 band to demonstrate a novel moderate-resolution (R=f/{\\Delta}f~100), multi-pixel, broadband, spectrometer concept for mm and submm-wave astronomy. Our design implements a transmission line filter bank using waveguide resonant cavities as a series of narrow-band filters, each coupled to an aluminum kinetic inductance detector (KID). This technology has the potential to perform the next generation of spectroscopic observations needed to drastically improve our understanding of the epoch of r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06528","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":"2026-05-18T02:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gu+aOgKxGjKklIzNTjso9AePTB75g+4J8Q9oJpCQ5w3hEOIu/oZNb6DsgSm9yt/sG/kdx9KIfOD8Z3HkjE9TCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:21:48.557065Z"},"content_sha256":"2759041bb30a09d8c3f4fe9bbaa2202b4f5f861d2aa071f2396ec1fbc8067dbc","schema_version":"1.0","event_id":"sha256:2759041bb30a09d8c3f4fe9bbaa2202b4f5f861d2aa071f2396ec1fbc8067dbc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/bundle.json","state_url":"https://pith.science/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/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":"2026-06-03T01:21:48Z","links":{"resolver":"https://pith.science/pith/S65K4SXWFOMEJJLQC5OP6LZR6U","bundle":"https://pith.science/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/bundle.json","state":"https://pith.science/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S65K4SXWFOMEJJLQC5OP6LZR6U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:S65K4SXWFOMEJJLQC5OP6LZR6U","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":"b4082430ab4ed5e1d7086e4fa4070e08b41a2e2432a0a124b9891fda72723dcc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-23T04:46:11Z","title_canon_sha256":"b0303cd2c4ca8cb7efb74c059091e788ddd524921318b63ed2832efc8e3be97e"},"schema_version":"1.0","source":{"id":"1503.06528","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.06528","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1503.06528v1","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.06528","created_at":"2026-05-18T02:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"S65K4SXWFOME","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"S65K4SXWFOMEJJLQ","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"S65K4SXW","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:2759041bb30a09d8c3f4fe9bbaa2202b4f5f861d2aa071f2396ec1fbc8067dbc","target":"graph","created_at":"2026-05-18T02:20:38Z","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":"We have designed, fabricated, and measured a 5-channel prototype spectrometer pixel operating in the WR10 band to demonstrate a novel moderate-resolution (R=f/{\\Delta}f~100), multi-pixel, broadband, spectrometer concept for mm and submm-wave astronomy. Our design implements a transmission line filter bank using waveguide resonant cavities as a series of narrow-band filters, each coupled to an aluminum kinetic inductance detector (KID). This technology has the potential to perform the next generation of spectroscopic observations needed to drastically improve our understanding of the epoch of r","authors_text":"Bradley Johnson, Christopher Groppi, Daniel Flanigan, George Che, Glenn Jones, Heather McCarrick, Matthew Underhill, Peter Day, Philip Mauskopf, Sean Bryan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-23T04:46:11Z","title":"WSPEC: A Waveguide Filter Bank Spectrometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06528","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":"sha256:8c63d35cd750864b0b74f33255919eb4875ec203956b33a38c84f6471b32d3d7","target":"record","created_at":"2026-05-18T02:20:38Z","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":"b4082430ab4ed5e1d7086e4fa4070e08b41a2e2432a0a124b9891fda72723dcc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-23T04:46:11Z","title_canon_sha256":"b0303cd2c4ca8cb7efb74c059091e788ddd524921318b63ed2832efc8e3be97e"},"schema_version":"1.0","source":{"id":"1503.06528","kind":"arxiv","version":1}},"canonical_sha256":"97baae4af62b9844a570175cff2f31f52d551c98fb7a64df0ff8e2d897c717d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"97baae4af62b9844a570175cff2f31f52d551c98fb7a64df0ff8e2d897c717d5","first_computed_at":"2026-05-18T02:20:38.129072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:38.129072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B7AHwZN/a/4LS1avclEElbOw4bGG+Lut4iN/zVHFAtJAbhCch7K/ae1xFtkMaqXlwWAfCZmdnXoyenbu2FsBBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:38.129744Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.06528","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c63d35cd750864b0b74f33255919eb4875ec203956b33a38c84f6471b32d3d7","sha256:2759041bb30a09d8c3f4fe9bbaa2202b4f5f861d2aa071f2396ec1fbc8067dbc"],"state_sha256":"1a6c12b7f2894ec068fb22958a0768c5793f395d21ed05d13ff95d20f0c13ed2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NEMifDxBjH9abQum1k4h1z4tfC2nAtb4bv1hAeGk4ZzHIPA4aoaYB+nEKsIaxwJPVtlySYIQmWQqQwEhm4EIAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T01:21:48.559638Z","bundle_sha256":"d0bae3ff6e83b2fa2d1376b7663f1c42190fe1a78bc1aa7cb25006a9eb9ae8d9"}}