{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:GSFBBWVNH2HV7NAEICG24E4BBB","short_pith_number":"pith:GSFBBWVN","canonical_record":{"source":{"id":"1311.5588","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-21T21:27:57Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"79e7b175b8e87c44fe86f72873b291dcac19f0576219a668f69d5a20f4b5acf9","abstract_canon_sha256":"d0537efda022278ff21f2434798e64e0c0f35318cf5d3e8bb6f4a69ccf197412"},"schema_version":"1.0"},"canonical_sha256":"348a10daad3e8f5fb404408dae1381084cad7f27b7e6939cba2a8ba7037d67ea","source":{"kind":"arxiv","id":"1311.5588","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5588","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5588v2","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5588","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"GSFBBWVNH2HV","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GSFBBWVNH2HV7NAE","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GSFBBWVN","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:GSFBBWVNH2HV7NAEICG24E4BBB","target":"record","payload":{"canonical_record":{"source":{"id":"1311.5588","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-21T21:27:57Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"79e7b175b8e87c44fe86f72873b291dcac19f0576219a668f69d5a20f4b5acf9","abstract_canon_sha256":"d0537efda022278ff21f2434798e64e0c0f35318cf5d3e8bb6f4a69ccf197412"},"schema_version":"1.0"},"canonical_sha256":"348a10daad3e8f5fb404408dae1381084cad7f27b7e6939cba2a8ba7037d67ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:22.773008Z","signature_b64":"MsXCvASEr3FTPBqz2iHd2Hl6t9V4ner0TY985LThN0Zk8p9kMXKTJL8qCk+QLAJdz0L9esqEctG5LNUjsvVXAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"348a10daad3e8f5fb404408dae1381084cad7f27b7e6939cba2a8ba7037d67ea","last_reissued_at":"2026-05-18T00:27:22.772371Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:22.772371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.5588","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":"2026-05-18T00:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B+2uarGsC/prtzDetXpNG/hk5RchFzMhRwkjDKsC2C1PCYM76oP+eYWZknWLNLWj094lzNaDYcx8RX08aZMOCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:27:26.834916Z"},"content_sha256":"803f776e516213a26204046917739b1c50881cd58dd2a79f14f8deef46c542ac","schema_version":"1.0","event_id":"sha256:803f776e516213a26204046917739b1c50881cd58dd2a79f14f8deef46c542ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:GSFBBWVNH2HV7NAEICG24E4BBB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Dust Scattering Halo of Cygnus X-3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Frits Paerels, Lia Corrales","submitted_at":"2013-11-21T21:27:57Z","abstract_excerpt":"Dust grains scatter X-ray light through small angles, producing a diffuse halo image around bright X-ray point sources situated behind a large amount of interstellar material. We present analytic solutions to the integral for the dust scattering intensity, which allow for a Bayesian analysis of the scattering halo around Cygnus X-3. Fitting the optically thin 4-6 keV halo surface brightness profile yields the dust grain size and spatial distribution. We assume a power law distribution of grain sizes ($n \\propto a^{-p}$) and fit for $p$, the grain radius cut-off amax, and dust mass column. We f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5588","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":"2026-05-18T00:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gCJ8tDkXVARkNCiUp0KdzINHs649LVsiL5yM47l0qUpIRnAQqSV/Sl1EfhMssRRS2uEql8gU9CGFaIEgOzCyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:27:26.835274Z"},"content_sha256":"1c5e96cb3a5ba2e1a41ae8646f8882694a88ac815a6a39314b3d738981c08439","schema_version":"1.0","event_id":"sha256:1c5e96cb3a5ba2e1a41ae8646f8882694a88ac815a6a39314b3d738981c08439"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GSFBBWVNH2HV7NAEICG24E4BBB/bundle.json","state_url":"https://pith.science/pith/GSFBBWVNH2HV7NAEICG24E4BBB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GSFBBWVNH2HV7NAEICG24E4BBB/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":"2026-05-30T05:27:26Z","links":{"resolver":"https://pith.science/pith/GSFBBWVNH2HV7NAEICG24E4BBB","bundle":"https://pith.science/pith/GSFBBWVNH2HV7NAEICG24E4BBB/bundle.json","state":"https://pith.science/pith/GSFBBWVNH2HV7NAEICG24E4BBB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GSFBBWVNH2HV7NAEICG24E4BBB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:GSFBBWVNH2HV7NAEICG24E4BBB","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":"d0537efda022278ff21f2434798e64e0c0f35318cf5d3e8bb6f4a69ccf197412","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-21T21:27:57Z","title_canon_sha256":"79e7b175b8e87c44fe86f72873b291dcac19f0576219a668f69d5a20f4b5acf9"},"schema_version":"1.0","source":{"id":"1311.5588","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5588","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5588v2","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5588","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"GSFBBWVNH2HV","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GSFBBWVNH2HV7NAE","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GSFBBWVN","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:1c5e96cb3a5ba2e1a41ae8646f8882694a88ac815a6a39314b3d738981c08439","target":"graph","created_at":"2026-05-18T00:27:22Z","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":"Dust grains scatter X-ray light through small angles, producing a diffuse halo image around bright X-ray point sources situated behind a large amount of interstellar material. We present analytic solutions to the integral for the dust scattering intensity, which allow for a Bayesian analysis of the scattering halo around Cygnus X-3. Fitting the optically thin 4-6 keV halo surface brightness profile yields the dust grain size and spatial distribution. We assume a power law distribution of grain sizes ($n \\propto a^{-p}$) and fit for $p$, the grain radius cut-off amax, and dust mass column. We f","authors_text":"Frits Paerels, Lia Corrales","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-21T21:27:57Z","title":"The Dust Scattering Halo of Cygnus X-3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5588","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":"sha256:803f776e516213a26204046917739b1c50881cd58dd2a79f14f8deef46c542ac","target":"record","created_at":"2026-05-18T00:27:22Z","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":"d0537efda022278ff21f2434798e64e0c0f35318cf5d3e8bb6f4a69ccf197412","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-21T21:27:57Z","title_canon_sha256":"79e7b175b8e87c44fe86f72873b291dcac19f0576219a668f69d5a20f4b5acf9"},"schema_version":"1.0","source":{"id":"1311.5588","kind":"arxiv","version":2}},"canonical_sha256":"348a10daad3e8f5fb404408dae1381084cad7f27b7e6939cba2a8ba7037d67ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"348a10daad3e8f5fb404408dae1381084cad7f27b7e6939cba2a8ba7037d67ea","first_computed_at":"2026-05-18T00:27:22.772371Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:22.772371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MsXCvASEr3FTPBqz2iHd2Hl6t9V4ner0TY985LThN0Zk8p9kMXKTJL8qCk+QLAJdz0L9esqEctG5LNUjsvVXAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:22.773008Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.5588","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:803f776e516213a26204046917739b1c50881cd58dd2a79f14f8deef46c542ac","sha256:1c5e96cb3a5ba2e1a41ae8646f8882694a88ac815a6a39314b3d738981c08439"],"state_sha256":"b8771ec00e45b23cbdd36cf684b1645591c818e53eb7dd5f54743326ee7bd0b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NY1kn5KiFvAUWkVW9E2RTr1hPdvRB9T+Fvj6P7+m80Px1cuzsHJXy/z5CTed8LI4zwpz5h0Mfg4TA9Iltxt1BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T05:27:26.837392Z","bundle_sha256":"5ae2aa728b55ca11ac1ad815bc22ec0a01f9bdfed890a77d7eb7fe8b2a606eed"}}