{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:GCM33FX3G7ZYWXNO65LW3OWKFI","short_pith_number":"pith:GCM33FX3","canonical_record":{"source":{"id":"2011.13314","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2020-11-26T14:33:22Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c9f85a227f5b89a93923b6dfbb2e9f4eb555355b2dc3535a7e7f0d9448471c3c","abstract_canon_sha256":"8bd139b75c5ec600c3041d7677d4154e051a9374e938970cf9956ba432b99f01"},"schema_version":"1.0"},"canonical_sha256":"3099bd96fb37f38b5daef7576dbaca2a2b107fdc3e9ffbad761f43fcd429ea2e","source":{"kind":"arxiv","id":"2011.13314","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.13314","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"arxiv_version","alias_value":"2011.13314v1","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.13314","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_12","alias_value":"GCM33FX3G7ZY","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_16","alias_value":"GCM33FX3G7ZYWXNO","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_8","alias_value":"GCM33FX3","created_at":"2026-07-05T01:54:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:GCM33FX3G7ZYWXNO65LW3OWKFI","target":"record","payload":{"canonical_record":{"source":{"id":"2011.13314","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2020-11-26T14:33:22Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"c9f85a227f5b89a93923b6dfbb2e9f4eb555355b2dc3535a7e7f0d9448471c3c","abstract_canon_sha256":"8bd139b75c5ec600c3041d7677d4154e051a9374e938970cf9956ba432b99f01"},"schema_version":"1.0"},"canonical_sha256":"3099bd96fb37f38b5daef7576dbaca2a2b107fdc3e9ffbad761f43fcd429ea2e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:54:52.971767Z","signature_b64":"4tts05pr5NfUNBWzSqbv0bMYsKt5HjTi6JB9z19wmPoef3RM2258RXQl6PvUvep+5AKJ5QYrP3EjrFBZ8eJjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3099bd96fb37f38b5daef7576dbaca2a2b107fdc3e9ffbad761f43fcd429ea2e","last_reissued_at":"2026-07-05T01:54:52.971397Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:54:52.971397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.13314","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":"2026-07-05T01:54:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Hi0RTRK6Dkij66uBsGcxGnr4wMZSpNe7nSb/9FumUeXUqQb1o8zv1ZUoNw0o5kJkj+JAZ2vfZF71iDWi47UBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:18:34.785704Z"},"content_sha256":"4913e379d4466531805d6e981d0a099a4c6da48c16f1a45264e0cc8d0a95ec30","schema_version":"1.0","event_id":"sha256:4913e379d4466531805d6e981d0a099a4c6da48c16f1a45264e0cc8d0a95ec30"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:GCM33FX3G7ZYWXNO65LW3OWKFI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Einstein Toolkit: A Student's Guide","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"gr-qc","authors_text":"Nicholas Choustikov","submitted_at":"2020-11-26T14:33:22Z","abstract_excerpt":"The Einstein Toolkit represents a unique opportunity for students to explore the world of numerical relativity, without the need for high-level computing power or knowledge of the mathematics behind the simulations themselves. This document aims to act as a resource for students aiming to learn about and get involved with Numerical Relativity, focusing specifically on the modelling of Binary Black Hole Mergers in order to produce sample Gravitational Waveforms as would be measured by Gravitational Wave detectors such as LIGO.\n  The feasibility of using the Einstein Toolkit on Amazon's Web Serv"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.13314","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.13314/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":"2026-07-05T01:54:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s/w+Q4nUsIE+380nn1PI2XEMNpHiHyjNLVzYT/lLypjBgwaAFSYhijyuEl3zuAUiphQJk6mPbIzd8ZTDlJIpDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:18:34.786268Z"},"content_sha256":"91d5292efeb5aceff91144e41b8218e9b6a6ae165595e14059a51ff25ce859cd","schema_version":"1.0","event_id":"sha256:91d5292efeb5aceff91144e41b8218e9b6a6ae165595e14059a51ff25ce859cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/bundle.json","state_url":"https://pith.science/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/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":"2026-08-04T11:18:34Z","links":{"resolver":"https://pith.science/pith/GCM33FX3G7ZYWXNO65LW3OWKFI","bundle":"https://pith.science/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/bundle.json","state":"https://pith.science/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GCM33FX3G7ZYWXNO65LW3OWKFI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:GCM33FX3G7ZYWXNO65LW3OWKFI","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":"8bd139b75c5ec600c3041d7677d4154e051a9374e938970cf9956ba432b99f01","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2020-11-26T14:33:22Z","title_canon_sha256":"c9f85a227f5b89a93923b6dfbb2e9f4eb555355b2dc3535a7e7f0d9448471c3c"},"schema_version":"1.0","source":{"id":"2011.13314","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.13314","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"arxiv_version","alias_value":"2011.13314v1","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.13314","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_12","alias_value":"GCM33FX3G7ZY","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_16","alias_value":"GCM33FX3G7ZYWXNO","created_at":"2026-07-05T01:54:52Z"},{"alias_kind":"pith_short_8","alias_value":"GCM33FX3","created_at":"2026-07-05T01:54:52Z"}],"graph_snapshots":[{"event_id":"sha256:91d5292efeb5aceff91144e41b8218e9b6a6ae165595e14059a51ff25ce859cd","target":"graph","created_at":"2026-07-05T01:54:52Z","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/2011.13314/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Einstein Toolkit represents a unique opportunity for students to explore the world of numerical relativity, without the need for high-level computing power or knowledge of the mathematics behind the simulations themselves. This document aims to act as a resource for students aiming to learn about and get involved with Numerical Relativity, focusing specifically on the modelling of Binary Black Hole Mergers in order to produce sample Gravitational Waveforms as would be measured by Gravitational Wave detectors such as LIGO.\n  The feasibility of using the Einstein Toolkit on Amazon's Web Serv","authors_text":"Nicholas Choustikov","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2020-11-26T14:33:22Z","title":"The Einstein Toolkit: A Student's Guide"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.13314","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":"sha256:4913e379d4466531805d6e981d0a099a4c6da48c16f1a45264e0cc8d0a95ec30","target":"record","created_at":"2026-07-05T01:54:52Z","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":"8bd139b75c5ec600c3041d7677d4154e051a9374e938970cf9956ba432b99f01","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2020-11-26T14:33:22Z","title_canon_sha256":"c9f85a227f5b89a93923b6dfbb2e9f4eb555355b2dc3535a7e7f0d9448471c3c"},"schema_version":"1.0","source":{"id":"2011.13314","kind":"arxiv","version":1}},"canonical_sha256":"3099bd96fb37f38b5daef7576dbaca2a2b107fdc3e9ffbad761f43fcd429ea2e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3099bd96fb37f38b5daef7576dbaca2a2b107fdc3e9ffbad761f43fcd429ea2e","first_computed_at":"2026-07-05T01:54:52.971397Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:54:52.971397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4tts05pr5NfUNBWzSqbv0bMYsKt5HjTi6JB9z19wmPoef3RM2258RXQl6PvUvep+5AKJ5QYrP3EjrFBZ8eJjDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:54:52.971767Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.13314","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4913e379d4466531805d6e981d0a099a4c6da48c16f1a45264e0cc8d0a95ec30","sha256:91d5292efeb5aceff91144e41b8218e9b6a6ae165595e14059a51ff25ce859cd"],"state_sha256":"a55c51c03c9767bf5ae1093b0b4dc3497c9c9423f4828189ce4feb8be807312b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Pu6b8qV+bUJZsT+dDKntpFBAkr4j32KRq5TVnhphYDbsLbRGb5j09qPtPADTHrM3okH+6lUd257nb3R3qzIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T11:18:34.790156Z","bundle_sha256":"ef357eddac6a9bfd035e19d9406fc6b66732b5870dd77d595c15752a17cb5478"}}