{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SLO7I6POS2EMXGG3C4NZ2JJHCQ","short_pith_number":"pith:SLO7I6PO","canonical_record":{"source":{"id":"1703.00621","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-02T05:03:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"66cd5045b3f0965525e271f918efe722da9561c191866f217a3fa1811b01e92c","abstract_canon_sha256":"bb21437408d09051507a306aa2af5c9e281388abe99f799cbcb7b4705a9b8d05"},"schema_version":"1.0"},"canonical_sha256":"92ddf479ee9688cb98db171b9d2527142552c73761c01e7fd37568ab3b9a206f","source":{"kind":"arxiv","id":"1703.00621","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00621","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00621v1","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00621","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"pith_short_12","alias_value":"SLO7I6POS2EM","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SLO7I6POS2EMXGG3","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SLO7I6PO","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SLO7I6POS2EMXGG3C4NZ2JJHCQ","target":"record","payload":{"canonical_record":{"source":{"id":"1703.00621","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-02T05:03:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"66cd5045b3f0965525e271f918efe722da9561c191866f217a3fa1811b01e92c","abstract_canon_sha256":"bb21437408d09051507a306aa2af5c9e281388abe99f799cbcb7b4705a9b8d05"},"schema_version":"1.0"},"canonical_sha256":"92ddf479ee9688cb98db171b9d2527142552c73761c01e7fd37568ab3b9a206f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:14.365792Z","signature_b64":"5x5cnVNVTNUqYPimRFjCyctFXGHBPOVWo6O9HbplDk0FasjJoSawApdp0zKq46uEOyAZPbsZmEpMALMqYScTBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92ddf479ee9688cb98db171b9d2527142552c73761c01e7fd37568ab3b9a206f","last_reissued_at":"2026-05-18T00:48:14.364984Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:14.364984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.00621","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":"2026-05-18T00:48:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3yajdIfcohgc4uWtEAIml/INnXPRBlNCFhk+gvvL8nAQQGwMpE3FDWkkNMGHK4q8fYjZ4jFbtozbpp8GnsyUCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:27:32.125781Z"},"content_sha256":"96c78580684f5b2101da1b1dae0e490e2c7532199ac1f2a70870a5cabb75708e","schema_version":"1.0","event_id":"sha256:96c78580684f5b2101da1b1dae0e490e2c7532199ac1f2a70870a5cabb75708e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SLO7I6POS2EMXGG3C4NZ2JJHCQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Ooty Wide Field Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"C. R. Subrahmanya, Jayaram. N. Chengalur, P. K. Manoharan","submitted_at":"2017-03-02T05:03:24Z","abstract_excerpt":"We describe here an ongoing upgrade to the legacy Ooty Radio Telescope (ORT).The ORT is a cylindrical parabolic cylinder 530mx30m in size operating at a frequency of 326.5 (or z ~ 3.35 for the HI 21cm line). The telescope has been constructed on a north-south hill slope whose gradient is equal to the latitude of the hill, making it effectively equitorially mounted. The feed consists of an array of 1056 dipoles. The key feature of this upgrade is the digitisation and cross-correlation of the signals of every set of 4-dipoles. This converts the ORT into a 264 element interferometer with a field "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00621","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":"2026-05-18T00:48:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wqLWeWAw/IWxy10lEdkt1bNwQUrqPebZwXZbPenizVG8n066XHdJm4HcqGpjHkDpBwejUA1CWTuhkogwV2WTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:27:32.126136Z"},"content_sha256":"0f7e1bf6264aa57adcf199feb9ef3cf1e69b9cf7a8845bf9a4bde28407501749","schema_version":"1.0","event_id":"sha256:0f7e1bf6264aa57adcf199feb9ef3cf1e69b9cf7a8845bf9a4bde28407501749"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/bundle.json","state_url":"https://pith.science/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/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":"2026-05-28T04:27:32Z","links":{"resolver":"https://pith.science/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ","bundle":"https://pith.science/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/bundle.json","state":"https://pith.science/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SLO7I6POS2EMXGG3C4NZ2JJHCQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SLO7I6POS2EMXGG3C4NZ2JJHCQ","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":"bb21437408d09051507a306aa2af5c9e281388abe99f799cbcb7b4705a9b8d05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-02T05:03:24Z","title_canon_sha256":"66cd5045b3f0965525e271f918efe722da9561c191866f217a3fa1811b01e92c"},"schema_version":"1.0","source":{"id":"1703.00621","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00621","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00621v1","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00621","created_at":"2026-05-18T00:48:14Z"},{"alias_kind":"pith_short_12","alias_value":"SLO7I6POS2EM","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SLO7I6POS2EMXGG3","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SLO7I6PO","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:0f7e1bf6264aa57adcf199feb9ef3cf1e69b9cf7a8845bf9a4bde28407501749","target":"graph","created_at":"2026-05-18T00:48:14Z","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 describe here an ongoing upgrade to the legacy Ooty Radio Telescope (ORT).The ORT is a cylindrical parabolic cylinder 530mx30m in size operating at a frequency of 326.5 (or z ~ 3.35 for the HI 21cm line). The telescope has been constructed on a north-south hill slope whose gradient is equal to the latitude of the hill, making it effectively equitorially mounted. The feed consists of an array of 1056 dipoles. The key feature of this upgrade is the digitisation and cross-correlation of the signals of every set of 4-dipoles. This converts the ORT into a 264 element interferometer with a field ","authors_text":"C. R. Subrahmanya, Jayaram. N. Chengalur, P. K. Manoharan","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-02T05:03:24Z","title":"The Ooty Wide Field Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00621","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":"sha256:96c78580684f5b2101da1b1dae0e490e2c7532199ac1f2a70870a5cabb75708e","target":"record","created_at":"2026-05-18T00:48:14Z","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":"bb21437408d09051507a306aa2af5c9e281388abe99f799cbcb7b4705a9b8d05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-02T05:03:24Z","title_canon_sha256":"66cd5045b3f0965525e271f918efe722da9561c191866f217a3fa1811b01e92c"},"schema_version":"1.0","source":{"id":"1703.00621","kind":"arxiv","version":1}},"canonical_sha256":"92ddf479ee9688cb98db171b9d2527142552c73761c01e7fd37568ab3b9a206f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92ddf479ee9688cb98db171b9d2527142552c73761c01e7fd37568ab3b9a206f","first_computed_at":"2026-05-18T00:48:14.364984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:14.364984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5x5cnVNVTNUqYPimRFjCyctFXGHBPOVWo6O9HbplDk0FasjJoSawApdp0zKq46uEOyAZPbsZmEpMALMqYScTBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:14.365792Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.00621","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96c78580684f5b2101da1b1dae0e490e2c7532199ac1f2a70870a5cabb75708e","sha256:0f7e1bf6264aa57adcf199feb9ef3cf1e69b9cf7a8845bf9a4bde28407501749"],"state_sha256":"c80fb44f9d5aee652d15f2e6dca519e02dd67144e930307cfa6a2bbf9d084f8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rLYKQ6v+7vSp/KciQA2GCX4/qi6YEYKxXUEqnlhPwb5SUAl+yTqGS8vkX7zHnjrUl0vR+GEiLl7C16qvPlmDCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:27:32.128364Z","bundle_sha256":"06393b19996a6fd150c4ba10540177c54d5ce976dbd4aa92058ef7f8d07009a2"}}