{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LTUE5UPFBXEH3KV7QYFG6B4DGZ","short_pith_number":"pith:LTUE5UPF","canonical_record":{"source":{"id":"1906.09670","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-23T23:22:08Z","cross_cats_sorted":[],"title_canon_sha256":"5558ee994ca2946a212baf3d36a6a13ecf8ed43ecdbf103e067c1222e70052d0","abstract_canon_sha256":"cf267074a120b0bf09f7f99147e866ae14dc6f32a9b3ef537ff73a84eb425e3d"},"schema_version":"1.0"},"canonical_sha256":"5ce84ed1e50dc87daabf860a6f0783364907a28aaf3f1c4aa9c406b28b42f4f5","source":{"kind":"arxiv","id":"1906.09670","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09670","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09670v3","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09670","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"LTUE5UPFBXEH","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_16","alias_value":"LTUE5UPFBXEH3KV7","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_8","alias_value":"LTUE5UPF","created_at":"2026-07-05T02:40:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LTUE5UPFBXEH3KV7QYFG6B4DGZ","target":"record","payload":{"canonical_record":{"source":{"id":"1906.09670","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-23T23:22:08Z","cross_cats_sorted":[],"title_canon_sha256":"5558ee994ca2946a212baf3d36a6a13ecf8ed43ecdbf103e067c1222e70052d0","abstract_canon_sha256":"cf267074a120b0bf09f7f99147e866ae14dc6f32a9b3ef537ff73a84eb425e3d"},"schema_version":"1.0"},"canonical_sha256":"5ce84ed1e50dc87daabf860a6f0783364907a28aaf3f1c4aa9c406b28b42f4f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:40:25.337911Z","signature_b64":"KIMNNWp5rCjzwfamuBWC1Y5eMeJwZXtbJShJTdNJEQxBMkOsfUfL69QNddBXMo2yHbZgBNmQMc9h4/5VgsdSDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ce84ed1e50dc87daabf860a6f0783364907a28aaf3f1c4aa9c406b28b42f4f5","last_reissued_at":"2026-07-05T02:40:25.337421Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:40:25.337421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.09670","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E56cEndgoBiWNLatxr27svh4M0c99OJoR5Z6ofcl/D7UVB5X/OeC8bfzMNT4DRJLpuJTGwCxm9xeJBt85mwXCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T00:52:42.641368Z"},"content_sha256":"c613b3af330e0058d9d55119957d9982c283fd1813550341ea59c39df6df56b2","schema_version":"1.0","event_id":"sha256:c613b3af330e0058d9d55119957d9982c283fd1813550341ea59c39df6df56b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LTUE5UPFBXEH3KV7QYFG6B4DGZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A machine learning approach for GRB detection in AstroSat CZTI data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Ajay Vibhute, A. R. Rao, Dipankar Bhattacharya, Nikhil Mukund, Santosh Vadawale, Shabnam Iyyani, Sheelu Abraham, Varun Bhalerao, Vidushi Sharma","submitted_at":"2019-06-23T23:22:08Z","abstract_excerpt":"We present a machine learning (ML) based method for automated detection of Gamma-Ray Burst (GRB) candidate events in the range 60 keV - 250 keV from the AstroSat Cadmium Zinc Telluride Imager data. We use density-based spatial clustering to detect excess power and carry out an unsupervised hierarchical clustering across all such events to identify the different light curves present in the data. This representation helps understand the instrument's sensitivity to the various GRB populations and identify the major non-astrophysical noise artefacts present in the data. We use Dynamic Time Warping"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09670","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1906.09670/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uaUk80ugOtcLlHq5lMuiQUwsaRKV/Rf69Uw3uG6mQkTKDw4NlLACh7bMcuQ57mTh0OjVog4GKsjhdEuRloumBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T00:52:42.641980Z"},"content_sha256":"2fd21263e164873dfc48b92b8ce57c6ae5af84e26efd87b9609f5aa8e8a4279f","schema_version":"1.0","event_id":"sha256:2fd21263e164873dfc48b92b8ce57c6ae5af84e26efd87b9609f5aa8e8a4279f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/bundle.json","state_url":"https://pith.science/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/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":"2026-08-07T00:52:42Z","links":{"resolver":"https://pith.science/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ","bundle":"https://pith.science/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/bundle.json","state":"https://pith.science/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LTUE5UPFBXEH3KV7QYFG6B4DGZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LTUE5UPFBXEH3KV7QYFG6B4DGZ","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":"cf267074a120b0bf09f7f99147e866ae14dc6f32a9b3ef537ff73a84eb425e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-23T23:22:08Z","title_canon_sha256":"5558ee994ca2946a212baf3d36a6a13ecf8ed43ecdbf103e067c1222e70052d0"},"schema_version":"1.0","source":{"id":"1906.09670","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09670","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09670v3","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09670","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"LTUE5UPFBXEH","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_16","alias_value":"LTUE5UPFBXEH3KV7","created_at":"2026-07-05T02:40:25Z"},{"alias_kind":"pith_short_8","alias_value":"LTUE5UPF","created_at":"2026-07-05T02:40:25Z"}],"graph_snapshots":[{"event_id":"sha256:2fd21263e164873dfc48b92b8ce57c6ae5af84e26efd87b9609f5aa8e8a4279f","target":"graph","created_at":"2026-07-05T02:40:25Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1906.09670/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a machine learning (ML) based method for automated detection of Gamma-Ray Burst (GRB) candidate events in the range 60 keV - 250 keV from the AstroSat Cadmium Zinc Telluride Imager data. We use density-based spatial clustering to detect excess power and carry out an unsupervised hierarchical clustering across all such events to identify the different light curves present in the data. This representation helps understand the instrument's sensitivity to the various GRB populations and identify the major non-astrophysical noise artefacts present in the data. We use Dynamic Time Warping","authors_text":"Ajay Vibhute, A. R. Rao, Dipankar Bhattacharya, Nikhil Mukund, Santosh Vadawale, Shabnam Iyyani, Sheelu Abraham, Varun Bhalerao, Vidushi Sharma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-23T23:22:08Z","title":"A machine learning approach for GRB detection in AstroSat CZTI data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09670","kind":"arxiv","version":3},"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:c613b3af330e0058d9d55119957d9982c283fd1813550341ea59c39df6df56b2","target":"record","created_at":"2026-07-05T02:40:25Z","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":"cf267074a120b0bf09f7f99147e866ae14dc6f32a9b3ef537ff73a84eb425e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-06-23T23:22:08Z","title_canon_sha256":"5558ee994ca2946a212baf3d36a6a13ecf8ed43ecdbf103e067c1222e70052d0"},"schema_version":"1.0","source":{"id":"1906.09670","kind":"arxiv","version":3}},"canonical_sha256":"5ce84ed1e50dc87daabf860a6f0783364907a28aaf3f1c4aa9c406b28b42f4f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ce84ed1e50dc87daabf860a6f0783364907a28aaf3f1c4aa9c406b28b42f4f5","first_computed_at":"2026-07-05T02:40:25.337421Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:40:25.337421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KIMNNWp5rCjzwfamuBWC1Y5eMeJwZXtbJShJTdNJEQxBMkOsfUfL69QNddBXMo2yHbZgBNmQMc9h4/5VgsdSDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:40:25.337911Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.09670","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c613b3af330e0058d9d55119957d9982c283fd1813550341ea59c39df6df56b2","sha256:2fd21263e164873dfc48b92b8ce57c6ae5af84e26efd87b9609f5aa8e8a4279f"],"state_sha256":"7870b7809144e584ade3f92c658098875bbe30ef9b0d18ea1b04e063b6854baf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RAqbOH+RCbEnmt1Rzpl7SlbEIJk81qXtx9Xy9QS0H6OtQ2QTkEKAfaqMeNJSIijqMrYq4HA56eFdRWOlSuEfCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T00:52:42.648917Z","bundle_sha256":"c1e89f017e1a1a433d25e5f583e483ead8597f454cea87d6e3c315e97dfc376a"}}