{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:3KUBUEKSGNUSFLJCHH3N64NBIP","short_pith_number":"pith:3KUBUEKS","canonical_record":{"source":{"id":"0901.2116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-14T22:23:09Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"17f61da6ad2dd3d4929ce28bb7b60c277be6672d42ab25015c7bb485517f196e","abstract_canon_sha256":"5672c9f761864fb633861de4a6709f5c65485f59ad623d55d8632877fdad9aa0"},"schema_version":"1.0"},"canonical_sha256":"daa81a1152336922ad2239f6df71a143c827a7b8c029e2e17976f5caeb8fa81b","source":{"kind":"arxiv","id":"0901.2116","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2116","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2116v2","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2116","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"3KUBUEKSGNUS","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3KUBUEKSGNUSFLJC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3KUBUEKS","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:3KUBUEKSGNUSFLJCHH3N64NBIP","target":"record","payload":{"canonical_record":{"source":{"id":"0901.2116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-14T22:23:09Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"17f61da6ad2dd3d4929ce28bb7b60c277be6672d42ab25015c7bb485517f196e","abstract_canon_sha256":"5672c9f761864fb633861de4a6709f5c65485f59ad623d55d8632877fdad9aa0"},"schema_version":"1.0"},"canonical_sha256":"daa81a1152336922ad2239f6df71a143c827a7b8c029e2e17976f5caeb8fa81b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:06.486204Z","signature_b64":"qW2m+hcPQAWjIlgfRYKN+rxGkQKI3apqtuOAcAIguryJj5U+GPGTBso1eMQC1XwXAxmIArY2RRmCEfUu7eVzAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"daa81a1152336922ad2239f6df71a143c827a7b8c029e2e17976f5caeb8fa81b","last_reissued_at":"2026-05-18T02:35:06.485714Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:06.485714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0901.2116","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ndxYUW1fD8XFA4V0zsKmYu2y6T0y+UTdysJMV1vPqPS/8i8z6Aa1OMXmqJmWa7tsuEpMyHwOUzGQciFKqMAtAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T21:51:28.307010Z"},"content_sha256":"9ddf4dfc12084f84aaa888c4d22d37fe61d8a74336d670e3d32f7341f16d4e00","schema_version":"1.0","event_id":"sha256:9ddf4dfc12084f84aaa888c4d22d37fe61d8a74336d670e3d32f7341f16d4e00"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:3KUBUEKSGNUSFLJCHH3N64NBIP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A quantitative explanation of the observed population of Milky Way satellite galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"2, (2) Institute of Astronomy, 3), (3) Sternberg Astronomical Institute, (4) Harvard-Smithsonian Center for Astrophysics, (5) Ohio State University, (6) Institut de Ci\\`encies del Cosmos, Andrea V. Macci\\`o (1), Barcelona, Cambridge, Columbus, David H. Weinberg (5), Germany, Hans-Walter Rix (1), Heidelberg, Jaiyul Yoo (4), Jordi Miralda-Escud\\'e (6) ((1) Max Planck Institute for Astronomy, Moscow, Russia, Sergey E. Koposov (1, Spain), UK, USA","submitted_at":"2009-01-14T22:23:09Z","abstract_excerpt":"We revisit the well known discrepancy between the observed number of Milky Way (MW) dwarf satellite companions and the predicted population of cold dark matter (CDM) sub-halos, in light of the dozen new low luminosity satellites found in SDSS imaging data and our recent calibration of the SDSS satellite detection efficiency, which implies a total population far larger than these dozen discoveries. We combine a dynamical model for the CDM sub-halo population with simple, physically motivated prescriptions for assigning stellar content to each sub-halo, then apply observational selection effects"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2116","kind":"arxiv","version":2},"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":"2026-05-18T02:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"geYSM8+LytBuxZgzh0c1O8P6AX/N950huJVFPkxadpERZq4NvHilDQO9X+slW8VSPrfEnzh4zNjE8WBUhiEIDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T21:51:28.307718Z"},"content_sha256":"6de554077134df298d6226dc53d86dffa90ba7c5c99511e4de34bdf5ad04125d","schema_version":"1.0","event_id":"sha256:6de554077134df298d6226dc53d86dffa90ba7c5c99511e4de34bdf5ad04125d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/bundle.json","state_url":"https://pith.science/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/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":"2026-05-23T21:51:28Z","links":{"resolver":"https://pith.science/pith/3KUBUEKSGNUSFLJCHH3N64NBIP","bundle":"https://pith.science/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/bundle.json","state":"https://pith.science/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3KUBUEKSGNUSFLJCHH3N64NBIP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:3KUBUEKSGNUSFLJCHH3N64NBIP","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":"5672c9f761864fb633861de4a6709f5c65485f59ad623d55d8632877fdad9aa0","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-14T22:23:09Z","title_canon_sha256":"17f61da6ad2dd3d4929ce28bb7b60c277be6672d42ab25015c7bb485517f196e"},"schema_version":"1.0","source":{"id":"0901.2116","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2116","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2116v2","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2116","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"3KUBUEKSGNUS","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3KUBUEKSGNUSFLJC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3KUBUEKS","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:6de554077134df298d6226dc53d86dffa90ba7c5c99511e4de34bdf5ad04125d","target":"graph","created_at":"2026-05-18T02:35:06Z","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 revisit the well known discrepancy between the observed number of Milky Way (MW) dwarf satellite companions and the predicted population of cold dark matter (CDM) sub-halos, in light of the dozen new low luminosity satellites found in SDSS imaging data and our recent calibration of the SDSS satellite detection efficiency, which implies a total population far larger than these dozen discoveries. We combine a dynamical model for the CDM sub-halo population with simple, physically motivated prescriptions for assigning stellar content to each sub-halo, then apply observational selection effects","authors_text":"2, (2) Institute of Astronomy, 3), (3) Sternberg Astronomical Institute, (4) Harvard-Smithsonian Center for Astrophysics, (5) Ohio State University, (6) Institut de Ci\\`encies del Cosmos, Andrea V. Macci\\`o (1), Barcelona, Cambridge, Columbus, David H. Weinberg (5), Germany, Hans-Walter Rix (1), Heidelberg, Jaiyul Yoo (4), Jordi Miralda-Escud\\'e (6) ((1) Max Planck Institute for Astronomy, Moscow, Russia, Sergey E. Koposov (1, Spain), UK, USA","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-14T22:23:09Z","title":"A quantitative explanation of the observed population of Milky Way satellite galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2116","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":"sha256:9ddf4dfc12084f84aaa888c4d22d37fe61d8a74336d670e3d32f7341f16d4e00","target":"record","created_at":"2026-05-18T02:35:06Z","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":"5672c9f761864fb633861de4a6709f5c65485f59ad623d55d8632877fdad9aa0","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-14T22:23:09Z","title_canon_sha256":"17f61da6ad2dd3d4929ce28bb7b60c277be6672d42ab25015c7bb485517f196e"},"schema_version":"1.0","source":{"id":"0901.2116","kind":"arxiv","version":2}},"canonical_sha256":"daa81a1152336922ad2239f6df71a143c827a7b8c029e2e17976f5caeb8fa81b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"daa81a1152336922ad2239f6df71a143c827a7b8c029e2e17976f5caeb8fa81b","first_computed_at":"2026-05-18T02:35:06.485714Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:06.485714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qW2m+hcPQAWjIlgfRYKN+rxGkQKI3apqtuOAcAIguryJj5U+GPGTBso1eMQC1XwXAxmIArY2RRmCEfUu7eVzAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:06.486204Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.2116","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ddf4dfc12084f84aaa888c4d22d37fe61d8a74336d670e3d32f7341f16d4e00","sha256:6de554077134df298d6226dc53d86dffa90ba7c5c99511e4de34bdf5ad04125d"],"state_sha256":"efce829d62b6329dd14a29a041da4b43983a5464b582dd7446a207088f1f0981"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+EKPFpbKt54/zLWrA1vVQD9wU3QkaUF8xVz1/GKApF4CNyom8ef4CIyHqzS+KiTNKaIRpH+yrt6/6UvKDqlbBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T21:51:28.311748Z","bundle_sha256":"00fe5d1e20523a98f860d3cba972ed662dfbdcc4c07fae9e471260acd66007b2"}}