{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:RHRJMIYCL2JAIZYYBPSL6WAG5T","short_pith_number":"pith:RHRJMIYC","schema_version":"1.0","canonical_sha256":"89e29623025e920467180be4bf5806ecfab780f4f23a385456f5e5dd5f7c67ba","source":{"kind":"arxiv","id":"1506.01021","version":2},"attestation_state":"computed","paper":{"title":"Spectroscopic Confirmation of the Dwarf Galaxies Hydra II and Pisces II and the Globular Cluster Laevens 1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Carnegie Observatories), Evan N. Kirby (1), Joshua D. Simon (2), Judith G. Cohen (1) ((1) Caltech","submitted_at":"2015-06-02T20:00:32Z","abstract_excerpt":"We present Keck/DEIMOS spectroscopy of stars in the recently discovered Milky Way satellites Hydra II, Pisces II, and Laevens 1. We measured a velocity dispersion of 5.4 (+3.6 -2.4) km/s for Pisces II, but we did not resolve the velocity dispersions of Hydra II or Laevens 1. We marginally resolved the metallicity dispersions of Hydra II and Pisces II but not Laevens 1. Furthermore, Hydra II and Pisces II obey the luminosity-metallicity relation for Milky Way dwarf galaxies (<[Fe/H]> = -2.02 +/- 0.08 and -2.45 +/- 0.07, respectively), whereas Laevens 1 does not (<[Fe/H]> = -1.68 +/- 0.05). The "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1506.01021","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-02T20:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"07464cb7b16a28c0d57b6ec018765f087694e65c0b6808fc944733aade1f5a55","abstract_canon_sha256":"6292c361ec572115a4a2e912133d5060a7f6dd76e0263a6fd8d17f7b44677b12"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:34.611953Z","signature_b64":"HGY8SdO///XDRy2s0iaXFqFwjz1XQr7tpGLQ3erfCcFlvf35G8cHvG7Ql2yw8Px+iieEnvKxIhR53uVo7I+oDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"89e29623025e920467180be4bf5806ecfab780f4f23a385456f5e5dd5f7c67ba","last_reissued_at":"2026-05-18T01:34:34.611306Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:34.611306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spectroscopic Confirmation of the Dwarf Galaxies Hydra II and Pisces II and the Globular Cluster Laevens 1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Carnegie Observatories), Evan N. Kirby (1), Joshua D. Simon (2), Judith G. Cohen (1) ((1) Caltech","submitted_at":"2015-06-02T20:00:32Z","abstract_excerpt":"We present Keck/DEIMOS spectroscopy of stars in the recently discovered Milky Way satellites Hydra II, Pisces II, and Laevens 1. We measured a velocity dispersion of 5.4 (+3.6 -2.4) km/s for Pisces II, but we did not resolve the velocity dispersions of Hydra II or Laevens 1. We marginally resolved the metallicity dispersions of Hydra II and Pisces II but not Laevens 1. Furthermore, Hydra II and Pisces II obey the luminosity-metallicity relation for Milky Way dwarf galaxies (<[Fe/H]> = -2.02 +/- 0.08 and -2.45 +/- 0.07, respectively), whereas Laevens 1 does not (<[Fe/H]> = -1.68 +/- 0.05). The "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.01021","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1506.01021","created_at":"2026-05-18T01:34:34.611409+00:00"},{"alias_kind":"arxiv_version","alias_value":"1506.01021v2","created_at":"2026-05-18T01:34:34.611409+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.01021","created_at":"2026-05-18T01:34:34.611409+00:00"},{"alias_kind":"pith_short_12","alias_value":"RHRJMIYCL2JA","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_16","alias_value":"RHRJMIYCL2JAIZYY","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_8","alias_value":"RHRJMIYC","created_at":"2026-05-18T12:29:39.896362+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T","json":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T.json","graph_json":"https://pith.science/api/pith-number/RHRJMIYCL2JAIZYYBPSL6WAG5T/graph.json","events_json":"https://pith.science/api/pith-number/RHRJMIYCL2JAIZYYBPSL6WAG5T/events.json","paper":"https://pith.science/paper/RHRJMIYC"},"agent_actions":{"view_html":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T","download_json":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T.json","view_paper":"https://pith.science/paper/RHRJMIYC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1506.01021&json=true","fetch_graph":"https://pith.science/api/pith-number/RHRJMIYCL2JAIZYYBPSL6WAG5T/graph.json","fetch_events":"https://pith.science/api/pith-number/RHRJMIYCL2JAIZYYBPSL6WAG5T/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T/action/storage_attestation","attest_author":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T/action/author_attestation","sign_citation":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T/action/citation_signature","submit_replication":"https://pith.science/pith/RHRJMIYCL2JAIZYYBPSL6WAG5T/action/replication_record"}},"created_at":"2026-05-18T01:34:34.611409+00:00","updated_at":"2026-05-18T01:34:34.611409+00:00"}