{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JSAB22G2QEUDVNY6XPRHMKHNSU","short_pith_number":"pith:JSAB22G2","canonical_record":{"source":{"id":"1505.01500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-06T20:05:29Z","cross_cats_sorted":[],"title_canon_sha256":"320c6dc5783eb5e7eebd273b4fd7e4e415e895ad390c182d55676b58bc6d524d","abstract_canon_sha256":"fe9bd8dfd3c82ce82881ff6b7fd67dfad5b48aa57c2b56287283aeb61b165b7e"},"schema_version":"1.0"},"canonical_sha256":"4c801d68da81283ab71ebbe27628ed9507dbe44b98b2ce48298ec1b804352667","source":{"kind":"arxiv","id":"1505.01500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01500","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01500v1","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01500","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"pith_short_12","alias_value":"JSAB22G2QEUD","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JSAB22G2QEUDVNY6","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JSAB22G2","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JSAB22G2QEUDVNY6XPRHMKHNSU","target":"record","payload":{"canonical_record":{"source":{"id":"1505.01500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-06T20:05:29Z","cross_cats_sorted":[],"title_canon_sha256":"320c6dc5783eb5e7eebd273b4fd7e4e415e895ad390c182d55676b58bc6d524d","abstract_canon_sha256":"fe9bd8dfd3c82ce82881ff6b7fd67dfad5b48aa57c2b56287283aeb61b165b7e"},"schema_version":"1.0"},"canonical_sha256":"4c801d68da81283ab71ebbe27628ed9507dbe44b98b2ce48298ec1b804352667","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:29:46.067881Z","signature_b64":"fBQIqQXZBCBVKre9kzjs8iRh9WcfNfFcBKWKh1iEjvbmFQKn1vS3mNN2OCXm43e28R0waL4NFXv2G6Q10VajBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c801d68da81283ab71ebbe27628ed9507dbe44b98b2ce48298ec1b804352667","last_reissued_at":"2026-05-18T01:29:46.067278Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:29:46.067278Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.01500","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":"2026-05-18T01:29:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vro+qOdLWFIQ6xkItatF5pE51TGcFteElTLXLaLaE8FbWJ5STG0tcc5N4MMjue/MKOU+jHwQDa3irzh3oIWDAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:51:25.702632Z"},"content_sha256":"b9e4d989339324b7ef9a3e07109fa63a6454cd903b2988731946ee17b0e09c7d","schema_version":"1.0","event_id":"sha256:b9e4d989339324b7ef9a3e07109fa63a6454cd903b2988731946ee17b0e09c7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JSAB22G2QEUDVNY6XPRHMKHNSU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fast Variability and mm/IR flares in GRMHD Models of Sgr A* from Strong-Field Gravitational Lensing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"(2) Department of Physics, (3) MIT Kavli Institute for Astrophysics, (4) Institute for Theory, Aleksander Sadowski (3), Chi-kwan Chan (1), Computation, Daniel Marrone (1), Department of Astronomy, Dimitrios Psaltis (1), Feryal Ozel (1), Harvard-Smithsonian Center for Astrophysics), Lia Medeiros (2), Ramesh Narayan (4) ((1) Steward Observatory, Space Research, UC Santa Barbara, University of Arizona","submitted_at":"2015-05-06T20:05:29Z","abstract_excerpt":"We explore the variability properties of long, high cadence GRMHD simulations across the electromagnetic spectrum using an efficient, GPU-based radiative transfer algorithm. We focus on both disk- and jet-dominated simulations with parameters that successfully reproduce the time-averaged spectral properties of Sgr A* and the size of its image at 1.3mm. We find that the disk-dominated models produce short timescale variability with amplitudes and power spectra that closely resemble those inferred observationally. In contrast, jet-dominated models generate only slow variability, at lower flux le"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01500","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":"2026-05-18T01:29:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1mm6vcoHkVc5mcrU4rILQECZeYjaD83/UrwY7iB6aKKJtU3rDg1x4ToYJJGvFgQRivCPVcRJTUhJS17/NxgeAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:51:25.702986Z"},"content_sha256":"9f357c91ab458f45c369fc618ceefe5ca2ed4d9bb6b7a062de88e604167a5f6f","schema_version":"1.0","event_id":"sha256:9f357c91ab458f45c369fc618ceefe5ca2ed4d9bb6b7a062de88e604167a5f6f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/bundle.json","state_url":"https://pith.science/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/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":"2026-05-28T08:51:25Z","links":{"resolver":"https://pith.science/pith/JSAB22G2QEUDVNY6XPRHMKHNSU","bundle":"https://pith.science/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/bundle.json","state":"https://pith.science/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JSAB22G2QEUDVNY6XPRHMKHNSU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JSAB22G2QEUDVNY6XPRHMKHNSU","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":"fe9bd8dfd3c82ce82881ff6b7fd67dfad5b48aa57c2b56287283aeb61b165b7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-06T20:05:29Z","title_canon_sha256":"320c6dc5783eb5e7eebd273b4fd7e4e415e895ad390c182d55676b58bc6d524d"},"schema_version":"1.0","source":{"id":"1505.01500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01500","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01500v1","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01500","created_at":"2026-05-18T01:29:46Z"},{"alias_kind":"pith_short_12","alias_value":"JSAB22G2QEUD","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JSAB22G2QEUDVNY6","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JSAB22G2","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:9f357c91ab458f45c369fc618ceefe5ca2ed4d9bb6b7a062de88e604167a5f6f","target":"graph","created_at":"2026-05-18T01:29:46Z","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 explore the variability properties of long, high cadence GRMHD simulations across the electromagnetic spectrum using an efficient, GPU-based radiative transfer algorithm. We focus on both disk- and jet-dominated simulations with parameters that successfully reproduce the time-averaged spectral properties of Sgr A* and the size of its image at 1.3mm. We find that the disk-dominated models produce short timescale variability with amplitudes and power spectra that closely resemble those inferred observationally. In contrast, jet-dominated models generate only slow variability, at lower flux le","authors_text":"(2) Department of Physics, (3) MIT Kavli Institute for Astrophysics, (4) Institute for Theory, Aleksander Sadowski (3), Chi-kwan Chan (1), Computation, Daniel Marrone (1), Department of Astronomy, Dimitrios Psaltis (1), Feryal Ozel (1), Harvard-Smithsonian Center for Astrophysics), Lia Medeiros (2), Ramesh Narayan (4) ((1) Steward Observatory, Space Research, UC Santa Barbara, University of Arizona","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-06T20:05:29Z","title":"Fast Variability and mm/IR flares in GRMHD Models of Sgr A* from Strong-Field Gravitational Lensing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01500","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:b9e4d989339324b7ef9a3e07109fa63a6454cd903b2988731946ee17b0e09c7d","target":"record","created_at":"2026-05-18T01:29:46Z","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":"fe9bd8dfd3c82ce82881ff6b7fd67dfad5b48aa57c2b56287283aeb61b165b7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-06T20:05:29Z","title_canon_sha256":"320c6dc5783eb5e7eebd273b4fd7e4e415e895ad390c182d55676b58bc6d524d"},"schema_version":"1.0","source":{"id":"1505.01500","kind":"arxiv","version":1}},"canonical_sha256":"4c801d68da81283ab71ebbe27628ed9507dbe44b98b2ce48298ec1b804352667","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c801d68da81283ab71ebbe27628ed9507dbe44b98b2ce48298ec1b804352667","first_computed_at":"2026-05-18T01:29:46.067278Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:29:46.067278Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fBQIqQXZBCBVKre9kzjs8iRh9WcfNfFcBKWKh1iEjvbmFQKn1vS3mNN2OCXm43e28R0waL4NFXv2G6Q10VajBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:29:46.067881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b9e4d989339324b7ef9a3e07109fa63a6454cd903b2988731946ee17b0e09c7d","sha256:9f357c91ab458f45c369fc618ceefe5ca2ed4d9bb6b7a062de88e604167a5f6f"],"state_sha256":"c486d793854e964a5adcc8a94739a47b0c0bebbad67387c3bcdf6609679f4667"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OVmvlKE5+9qxGiFNcmWWmczYuIk0v6E3oCZuBPVc9LhuwxMUHIdqPMI/EagIcsFGfvbt2dkERFXsOCemxWxVBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:51:25.705045Z","bundle_sha256":"ddd8ee0f0cfe2f3687f7559459bc73f68d17d0b217de15d85badb14f79f81024"}}