{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:7F6XHVLNHEPNEZFBW472B6XGET","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":"2b7ae686ad6545c42c5797bdef618fc85dfd693bfa8b84e3c1845752e780c940","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-08-21T16:11:34Z","title_canon_sha256":"90ef9f01dc48b8f9c8a1edcf0ffbe19f5ad8655ab64e0641f2bd6cf9363a6588"},"schema_version":"1.0","source":{"id":"1108.4187","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.4187","created_at":"2026-05-18T02:00:50Z"},{"alias_kind":"arxiv_version","alias_value":"1108.4187v2","created_at":"2026-05-18T02:00:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.4187","created_at":"2026-05-18T02:00:50Z"},{"alias_kind":"pith_short_12","alias_value":"7F6XHVLNHEPN","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"7F6XHVLNHEPNEZFB","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"7F6XHVLN","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:5200ccf5ff43fe5da83f3997a25acf013e242e2588912e2f8ed899b4d2e60c6e","target":"graph","created_at":"2026-05-18T02:00:50Z","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":"In this work, we propose a new strategy for the pixel-lensing observation of M87 in the Virgo cluster using the {\\it Hubble Space Telescope} (HST). In contrast to the previous observational strategy by Baltz et al., we show that a few days intensive observation with the duration of $\\sim 90 $min in each HST orbit will increase the observational efficiency of the high-magnification events by more than one order of magnitude. We perform a Monte-Carlo simulation for this strategy and we show that the number of high magnification microlensing events will increase at the rate of 4.2 event per day w","authors_text":"Sedighe Sajadian, Sohrab Rahvar","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-08-21T16:11:34Z","title":"Simulation of a strategy for the pixel lensing of M87 using the Hubble Space Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4187","kind":"arxiv","version":2},"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":"sha256:9353f0bf136e35805b14ea73993ab4a533c6191f8babef205ba9ad8cb2567a57","target":"record","created_at":"2026-05-18T02:00:50Z","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":"2b7ae686ad6545c42c5797bdef618fc85dfd693bfa8b84e3c1845752e780c940","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-08-21T16:11:34Z","title_canon_sha256":"90ef9f01dc48b8f9c8a1edcf0ffbe19f5ad8655ab64e0641f2bd6cf9363a6588"},"schema_version":"1.0","source":{"id":"1108.4187","kind":"arxiv","version":2}},"canonical_sha256":"f97d73d56d391ed264a1b73fa0fae624d5567ce39f2ba1d50234e2824ab4367a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f97d73d56d391ed264a1b73fa0fae624d5567ce39f2ba1d50234e2824ab4367a","first_computed_at":"2026-05-18T02:00:50.078472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:50.078472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wZkfF+JVaJD6TGUuN1KGZaAEFT0If9FOeaR+KOPy8pFtp9KgM/NhTJxbm9x+p2Se33W9Phn5cQXD5xWS2A+qBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:50.079120Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.4187","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9353f0bf136e35805b14ea73993ab4a533c6191f8babef205ba9ad8cb2567a57","sha256:5200ccf5ff43fe5da83f3997a25acf013e242e2588912e2f8ed899b4d2e60c6e"],"state_sha256":"ae9951c843db5e6f9473782c7dd476dd48c5f341607d300cc6bcea03710db4f0"}