{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:RTRHP3Q263PNPXJVEBVMF7FLWZ","short_pith_number":"pith:RTRHP3Q2","schema_version":"1.0","canonical_sha256":"8ce277ee1af6ded7dd35206ac2fcabb66715ef41028d9de887d49bc6a3371849","source":{"kind":"arxiv","id":"1702.07349","version":1},"attestation_state":"computed","paper":{"title":"X-ray spectroscopy of the z=6.4 quasar J1148+5251","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Ferrara, Andrea Pallottini, Chiara Feruglio, Cristian Vignali, Enrico Piconcelli, Fabrizio Fiore, Luca Zappacosta, Maria Carmela Orofino, Roberto Gilli, Roberto Maiolino, Roberto Neri, Simona Gallerani","submitted_at":"2017-02-23T19:00:01Z","abstract_excerpt":"We present the 78-ks Chandra observations of the $z=6.4$ quasar SDSS J1148+5251. The source is clearly detected in the energy range 0.3-7 keV with 42 counts (with a significance $\\gtrsim9\\sigma$). The X-ray spectrum is best-fitted by a power-law with photon index $\\Gamma=1.9$ absorbed by a gas column density of $\\rm N_{\\rm H}=2.0^{+2.0}_{-1.5}\\times10^{23}\\,\\rm cm^{-2}$. We measure an intrinsic luminosity at 2-10 keV and 10-40 keV equal to $\\sim 1.5\\times 10^{45}~\\rm erg~s^{-1}$, comparable with luminous local and intermediate-redshift quasar properties. Moreover, the X-ray to optical power-la"},"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":"1702.07349","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-23T19:00:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"38250fd6a5a73ac690265d0c4a04cbfd64a4852fd268a1ac7da4b728c856ee08","abstract_canon_sha256":"f54c3341186ca0cb762dc750d7afe14d28f9572369471738d7c7f567ba281c1f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:14.469414Z","signature_b64":"GfBDo9n1fz/MIvQ1yEtlN/J0g+rdLbUHFG3kpA42OAmNs4F/euiK/qZGOD7yZlxst0hNywsqW6jCCII0opNLCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ce277ee1af6ded7dd35206ac2fcabb66715ef41028d9de887d49bc6a3371849","last_reissued_at":"2026-05-18T00:48:14.468707Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:14.468707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"X-ray spectroscopy of the z=6.4 quasar J1148+5251","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Ferrara, Andrea Pallottini, Chiara Feruglio, Cristian Vignali, Enrico Piconcelli, Fabrizio Fiore, Luca Zappacosta, Maria Carmela Orofino, Roberto Gilli, Roberto Maiolino, Roberto Neri, Simona Gallerani","submitted_at":"2017-02-23T19:00:01Z","abstract_excerpt":"We present the 78-ks Chandra observations of the $z=6.4$ quasar SDSS J1148+5251. The source is clearly detected in the energy range 0.3-7 keV with 42 counts (with a significance $\\gtrsim9\\sigma$). The X-ray spectrum is best-fitted by a power-law with photon index $\\Gamma=1.9$ absorbed by a gas column density of $\\rm N_{\\rm H}=2.0^{+2.0}_{-1.5}\\times10^{23}\\,\\rm cm^{-2}$. We measure an intrinsic luminosity at 2-10 keV and 10-40 keV equal to $\\sim 1.5\\times 10^{45}~\\rm erg~s^{-1}$, comparable with luminous local and intermediate-redshift quasar properties. Moreover, the X-ray to optical power-la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07349","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1702.07349","created_at":"2026-05-18T00:48:14.468807+00:00"},{"alias_kind":"arxiv_version","alias_value":"1702.07349v1","created_at":"2026-05-18T00:48:14.468807+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07349","created_at":"2026-05-18T00:48:14.468807+00:00"},{"alias_kind":"pith_short_12","alias_value":"RTRHP3Q263PN","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_16","alias_value":"RTRHP3Q263PNPXJV","created_at":"2026-05-18T12:31:39.905425+00:00"},{"alias_kind":"pith_short_8","alias_value":"RTRHP3Q2","created_at":"2026-05-18T12:31:39.905425+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/RTRHP3Q263PNPXJVEBVMF7FLWZ","json":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ.json","graph_json":"https://pith.science/api/pith-number/RTRHP3Q263PNPXJVEBVMF7FLWZ/graph.json","events_json":"https://pith.science/api/pith-number/RTRHP3Q263PNPXJVEBVMF7FLWZ/events.json","paper":"https://pith.science/paper/RTRHP3Q2"},"agent_actions":{"view_html":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ","download_json":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ.json","view_paper":"https://pith.science/paper/RTRHP3Q2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1702.07349&json=true","fetch_graph":"https://pith.science/api/pith-number/RTRHP3Q263PNPXJVEBVMF7FLWZ/graph.json","fetch_events":"https://pith.science/api/pith-number/RTRHP3Q263PNPXJVEBVMF7FLWZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ/action/storage_attestation","attest_author":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ/action/author_attestation","sign_citation":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ/action/citation_signature","submit_replication":"https://pith.science/pith/RTRHP3Q263PNPXJVEBVMF7FLWZ/action/replication_record"}},"created_at":"2026-05-18T00:48:14.468807+00:00","updated_at":"2026-05-18T00:48:14.468807+00:00"}