Pith Number

pith:SYEP4T6A

pith:2018:SYEP4T6AA7H62VHMJAUSS7NHEX

not attested not anchored not stored refs pending

Resolving the X-ray obscuration in a low flux observation of the quasar PDS 456

Andrew Lobban, Emanuele Nardini, Fred Hamann, George Chartas, James Reeves, Jane Turner, Paul O'Brien, Valentina Braito

arxiv:1809.07164 v1 · 2018-09-19 · astro-ph.HE · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SYEP4T6AA7H62VHMJAUSS7NHEX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:01:28.236799Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9608fe4fc007cfed54ec4829297da725dad688088b2ab5b724829e7eebe16e8c

Aliases

arxiv: 1809.07164 · arxiv_version: 1809.07164v1 · doi: 10.48550/arxiv.1809.07164 · pith_short_12: SYEP4T6AA7H6 · pith_short_16: SYEP4T6AA7H62VHM · pith_short_8: SYEP4T6A

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/SYEP4T6AA7H62VHMJAUSS7NHEX \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9608fe4fc007cfed54ec4829297da725dad688088b2ab5b724829e7eebe16e8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c14eeaa5ce82d1d4d6ee07bca2c6ec1ea79c073bc3873c5670d7673cca7c475c",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2018-09-19T13:11:15Z",
    "title_canon_sha256": "b0a95dd19113749882b05b94c4a5cc514033207881b2708c40afa19041163554"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.07164",
    "kind": "arxiv",
    "version": 1
  }
}