{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OIQ673EQI6BHX2ENOUFLDWKRA2","short_pith_number":"pith:OIQ673EQ","canonical_record":{"source":{"id":"1707.01664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-06T07:40:28Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"57387ef2900ce8a0ff0b261e2c3e5d777feee5b24cd341d02b715c0b2824b76f","abstract_canon_sha256":"3d096c360a693957df7ca3cdf0211542cfc9f831b1110e1d9128553e47dab000"},"schema_version":"1.0"},"canonical_sha256":"7221efec9047827be88d750ab1d95106a82b791eade1824036981c9776efa67a","source":{"kind":"arxiv","id":"1707.01664","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.01664","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"arxiv_version","alias_value":"1707.01664v1","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.01664","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"pith_short_12","alias_value":"OIQ673EQI6BH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OIQ673EQI6BHX2EN","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OIQ673EQ","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OIQ673EQI6BHX2ENOUFLDWKRA2","target":"record","payload":{"canonical_record":{"source":{"id":"1707.01664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-06T07:40:28Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"57387ef2900ce8a0ff0b261e2c3e5d777feee5b24cd341d02b715c0b2824b76f","abstract_canon_sha256":"3d096c360a693957df7ca3cdf0211542cfc9f831b1110e1d9128553e47dab000"},"schema_version":"1.0"},"canonical_sha256":"7221efec9047827be88d750ab1d95106a82b791eade1824036981c9776efa67a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:31.022151Z","signature_b64":"VnaFhck79k1C9hBBgzC/oYc3msYI04B2jADloc8HpjjbPBMnR/KGnPqeVwqY5GS+9HEeGaj8bcDCg3hKNKZlBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7221efec9047827be88d750ab1d95106a82b791eade1824036981c9776efa67a","last_reissued_at":"2026-05-18T00:39:31.021583Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:31.021583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.01664","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":"2026-05-18T00:39:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3dGc0ypwsPC0wFE8D1LjJHzutloOfaTz8JLz3LEq1ocG0BE8I/+HuWZtDdUDYc7Wu8aiwsjBMzYEvKDEpZlTAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:52:56.392648Z"},"content_sha256":"209a470e7fd792aa2e6292d6ff4a9eecbf0f58bbb4e53fad75b8edeaaa8e43ad","schema_version":"1.0","event_id":"sha256:209a470e7fd792aa2e6292d6ff4a9eecbf0f58bbb4e53fad75b8edeaaa8e43ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OIQ673EQI6BHX2ENOUFLDWKRA2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phased array observations with infield phasing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.IM","authors_text":"Jayaram Chengalur, Sanjay Kudale","submitted_at":"2017-07-06T07:40:28Z","abstract_excerpt":"We present results from pulsar observations using the Giant Metrewave Radio Telescope (GMRT) as a phased array with infield phasing. The antennas were kept in phase throughout the observation by applying antenna based phase corrections derived from visibilities that were obtained in parallel with the phased array beam data, and which were flagged and calibrated in real time using a model for the continuum emission in the target field. We find that, as expected, the signal to noise ratio (SNR) does not degrade with time. In contrast observations in which the phasing is done only at the start of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.01664","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":"2026-05-18T00:39:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"478UwcdtLi7rfyM+U/wIbLagAWoBsFnZr5tfXTKKZuZPi/9KT6E2JXGi4d2H8C0cxc2792LiCIjbs/Jp3S3eCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:52:56.392998Z"},"content_sha256":"9da48acf2cffa2b903fa032f494767a2d9a3531e6887dcaf9786059ce62838b8","schema_version":"1.0","event_id":"sha256:9da48acf2cffa2b903fa032f494767a2d9a3531e6887dcaf9786059ce62838b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/bundle.json","state_url":"https://pith.science/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/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":"2026-06-03T09:52:56Z","links":{"resolver":"https://pith.science/pith/OIQ673EQI6BHX2ENOUFLDWKRA2","bundle":"https://pith.science/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/bundle.json","state":"https://pith.science/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OIQ673EQI6BHX2ENOUFLDWKRA2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OIQ673EQI6BHX2ENOUFLDWKRA2","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":"3d096c360a693957df7ca3cdf0211542cfc9f831b1110e1d9128553e47dab000","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-06T07:40:28Z","title_canon_sha256":"57387ef2900ce8a0ff0b261e2c3e5d777feee5b24cd341d02b715c0b2824b76f"},"schema_version":"1.0","source":{"id":"1707.01664","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.01664","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"arxiv_version","alias_value":"1707.01664v1","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.01664","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"pith_short_12","alias_value":"OIQ673EQI6BH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OIQ673EQI6BHX2EN","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OIQ673EQ","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:9da48acf2cffa2b903fa032f494767a2d9a3531e6887dcaf9786059ce62838b8","target":"graph","created_at":"2026-05-18T00:39:31Z","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 present results from pulsar observations using the Giant Metrewave Radio Telescope (GMRT) as a phased array with infield phasing. The antennas were kept in phase throughout the observation by applying antenna based phase corrections derived from visibilities that were obtained in parallel with the phased array beam data, and which were flagged and calibrated in real time using a model for the continuum emission in the target field. We find that, as expected, the signal to noise ratio (SNR) does not degrade with time. In contrast observations in which the phasing is done only at the start of","authors_text":"Jayaram Chengalur, Sanjay Kudale","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-06T07:40:28Z","title":"Phased array observations with infield phasing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.01664","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":"sha256:209a470e7fd792aa2e6292d6ff4a9eecbf0f58bbb4e53fad75b8edeaaa8e43ad","target":"record","created_at":"2026-05-18T00:39:31Z","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":"3d096c360a693957df7ca3cdf0211542cfc9f831b1110e1d9128553e47dab000","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-06T07:40:28Z","title_canon_sha256":"57387ef2900ce8a0ff0b261e2c3e5d777feee5b24cd341d02b715c0b2824b76f"},"schema_version":"1.0","source":{"id":"1707.01664","kind":"arxiv","version":1}},"canonical_sha256":"7221efec9047827be88d750ab1d95106a82b791eade1824036981c9776efa67a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7221efec9047827be88d750ab1d95106a82b791eade1824036981c9776efa67a","first_computed_at":"2026-05-18T00:39:31.021583Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:31.021583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VnaFhck79k1C9hBBgzC/oYc3msYI04B2jADloc8HpjjbPBMnR/KGnPqeVwqY5GS+9HEeGaj8bcDCg3hKNKZlBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:31.022151Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.01664","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:209a470e7fd792aa2e6292d6ff4a9eecbf0f58bbb4e53fad75b8edeaaa8e43ad","sha256:9da48acf2cffa2b903fa032f494767a2d9a3531e6887dcaf9786059ce62838b8"],"state_sha256":"b2c1c762142a3b6d5118341c83e5f2bd5cb6b78bb0c83bae092d12c9e4f838bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6RlM6QqzXv0ya9o7ZsAbhTXv5NTnLwI3MiOpXeCU/uI7V5bEnFPDqyauhjQKkEXtZbQDPX5S3VuE+G56GmAtDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T09:52:56.397806Z","bundle_sha256":"65089c56baaa2eec75b0d7a3912db89dc861e5f553add28b6bc92dc707ce0817"}}