{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:VSY6WVBHRTF74PHJXKASINYIVO","short_pith_number":"pith:VSY6WVBH","canonical_record":{"source":{"id":"1411.5017","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-18T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4596f4f587dc63cc5f834a767d7d1cdf60ea04e237a0ff0efd63ccdbae8aa074","abstract_canon_sha256":"5d0d6404da4baf984f48c4a5812d7571031de170f33e4a22a8a42fc1e83ef20f"},"schema_version":"1.0"},"canonical_sha256":"acb1eb54278ccbfe3ce9ba81243708ab8749f3f4835cb9c8af77c5779f67ab8e","source":{"kind":"arxiv","id":"1411.5017","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.5017","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"arxiv_version","alias_value":"1411.5017v1","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.5017","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"pith_short_12","alias_value":"VSY6WVBHRTF7","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VSY6WVBHRTF74PHJ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VSY6WVBH","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:VSY6WVBHRTF74PHJXKASINYIVO","target":"record","payload":{"canonical_record":{"source":{"id":"1411.5017","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-18T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"4596f4f587dc63cc5f834a767d7d1cdf60ea04e237a0ff0efd63ccdbae8aa074","abstract_canon_sha256":"5d0d6404da4baf984f48c4a5812d7571031de170f33e4a22a8a42fc1e83ef20f"},"schema_version":"1.0"},"canonical_sha256":"acb1eb54278ccbfe3ce9ba81243708ab8749f3f4835cb9c8af77c5779f67ab8e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:29.320602Z","signature_b64":"eaxtzYvwMc+kgd6gwY4I0vYELbipfMKRqVQ2gT6hDFP5kDdVESiP+gMd88gw9s3fcF5KdHh1dsBDPUZ1z8G8CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acb1eb54278ccbfe3ce9ba81243708ab8749f3f4835cb9c8af77c5779f67ab8e","last_reissued_at":"2026-05-18T01:41:29.319984Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:29.319984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.5017","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bD5sqJuo2GWmo9bI/JGO8/Fw9zLeLICJJ5EuS0wEJb9yW2UiycNSPvAxoXqt2fHLgG4Lt+2sOYX4E+qu2y8xBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:58:31.187682Z"},"content_sha256":"b786bf7c2e17275f364085fb7ddda7daa042e3b12c5675ef0d407575e2ad57c2","schema_version":"1.0","event_id":"sha256:b786bf7c2e17275f364085fb7ddda7daa042e3b12c5675ef0d407575e2ad57c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:VSY6WVBHRTF74PHJXKASINYIVO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"XMM-Newton Measurement of the Galactic Halo X-ray Emission using a Compact Shadowing Cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"David B. Henley, Phillip C. Stancil (University of Georgia), Renata S. Cumbee, Robin L. Shelton","submitted_at":"2014-11-18T21:00:00Z","abstract_excerpt":"Observations of interstellar clouds that cast shadows in the soft X-ray background can be used to separate the background Galactic halo emission from the local emission due to solar wind charge exchange (SWCX) and/or the Local Bubble (LB). We present an XMM-Newton observation of a shadowing cloud, G225.60-66.40, that is sufficiently compact that the on- and off-shadow spectra can be extracted from a single field of view (unlike previous shadowing observations of the halo with CCD-resolution spectrometers, which consisted of separate on- and off-shadow pointings). We analyzed the spectra using "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.5017","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wr72N7JXZ/oXWEjqQTwqh8lUeL3QLkPPLF858mxbKHUFV87XwWHIDtR+dnJwE4o0HrBozCafu+tf0SDurWjYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:58:31.188349Z"},"content_sha256":"ee8c16baf372cc9c40d582ce5b481f5d647cc4a7c9741c275667253dd96d65d0","schema_version":"1.0","event_id":"sha256:ee8c16baf372cc9c40d582ce5b481f5d647cc4a7c9741c275667253dd96d65d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VSY6WVBHRTF74PHJXKASINYIVO/bundle.json","state_url":"https://pith.science/pith/VSY6WVBHRTF74PHJXKASINYIVO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VSY6WVBHRTF74PHJXKASINYIVO/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":"2026-05-26T03:58:31Z","links":{"resolver":"https://pith.science/pith/VSY6WVBHRTF74PHJXKASINYIVO","bundle":"https://pith.science/pith/VSY6WVBHRTF74PHJXKASINYIVO/bundle.json","state":"https://pith.science/pith/VSY6WVBHRTF74PHJXKASINYIVO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VSY6WVBHRTF74PHJXKASINYIVO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VSY6WVBHRTF74PHJXKASINYIVO","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":"5d0d6404da4baf984f48c4a5812d7571031de170f33e4a22a8a42fc1e83ef20f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-18T21:00:00Z","title_canon_sha256":"4596f4f587dc63cc5f834a767d7d1cdf60ea04e237a0ff0efd63ccdbae8aa074"},"schema_version":"1.0","source":{"id":"1411.5017","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.5017","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"arxiv_version","alias_value":"1411.5017v1","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.5017","created_at":"2026-05-18T01:41:29Z"},{"alias_kind":"pith_short_12","alias_value":"VSY6WVBHRTF7","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VSY6WVBHRTF74PHJ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VSY6WVBH","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:ee8c16baf372cc9c40d582ce5b481f5d647cc4a7c9741c275667253dd96d65d0","target":"graph","created_at":"2026-05-18T01:41:29Z","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":"Observations of interstellar clouds that cast shadows in the soft X-ray background can be used to separate the background Galactic halo emission from the local emission due to solar wind charge exchange (SWCX) and/or the Local Bubble (LB). We present an XMM-Newton observation of a shadowing cloud, G225.60-66.40, that is sufficiently compact that the on- and off-shadow spectra can be extracted from a single field of view (unlike previous shadowing observations of the halo with CCD-resolution spectrometers, which consisted of separate on- and off-shadow pointings). We analyzed the spectra using ","authors_text":"David B. Henley, Phillip C. Stancil (University of Georgia), Renata S. Cumbee, Robin L. Shelton","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-18T21:00:00Z","title":"XMM-Newton Measurement of the Galactic Halo X-ray Emission using a Compact Shadowing Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.5017","kind":"arxiv","version":1},"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:b786bf7c2e17275f364085fb7ddda7daa042e3b12c5675ef0d407575e2ad57c2","target":"record","created_at":"2026-05-18T01:41:29Z","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":"5d0d6404da4baf984f48c4a5812d7571031de170f33e4a22a8a42fc1e83ef20f","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-18T21:00:00Z","title_canon_sha256":"4596f4f587dc63cc5f834a767d7d1cdf60ea04e237a0ff0efd63ccdbae8aa074"},"schema_version":"1.0","source":{"id":"1411.5017","kind":"arxiv","version":1}},"canonical_sha256":"acb1eb54278ccbfe3ce9ba81243708ab8749f3f4835cb9c8af77c5779f67ab8e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"acb1eb54278ccbfe3ce9ba81243708ab8749f3f4835cb9c8af77c5779f67ab8e","first_computed_at":"2026-05-18T01:41:29.319984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:29.319984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eaxtzYvwMc+kgd6gwY4I0vYELbipfMKRqVQ2gT6hDFP5kDdVESiP+gMd88gw9s3fcF5KdHh1dsBDPUZ1z8G8CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:29.320602Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.5017","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b786bf7c2e17275f364085fb7ddda7daa042e3b12c5675ef0d407575e2ad57c2","sha256:ee8c16baf372cc9c40d582ce5b481f5d647cc4a7c9741c275667253dd96d65d0"],"state_sha256":"7c0a7124e35259f5f4db52538f6b98a3c072e6427c6c9a56fc3a30749dc9e1d7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JkHR9XDk8EQaUSVHA5FvDhm5UB7N0LrN6BXEKj/mmf7eUR/3BPWnYXeZ25LC4GgZR2Gz2FRTtd2S6y9SF81aBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:58:31.191786Z","bundle_sha256":"87bdbe0b6c7f7e78150fa4e08b268af00ee23d8d5a4a28575b3d1eae1b6fe7bd"}}