Pith Number

pith:BHRIRG35

pith:2000:BHRIRG357TW6KF6JAI7LWKAS6N

not attested not anchored not stored refs pending

Resolving the extragalactic hard X-ray background

A. J. Barger, K. A. Arnaud, L. L. Cowie, R. F. Mushotzky

arxiv:astro-ph/0002313 v1 · 2000-02-16 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BHRIRG357TW6KF6JAI7LWKAS6N}

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	2026-05-18T00:44:47.813025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09e2889b7dfcede517c9023ebb2812f371a2b6f3e1fd603436ed5c052bc78335

Aliases

arxiv: astro-ph/0002313 · arxiv_version: astro-ph/0002313v1 · doi: 10.48550/arxiv.astro-ph/0002313 · pith_short_12: BHRIRG357TW6 · pith_short_16: BHRIRG357TW6KF6J · pith_short_8: BHRIRG35

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/BHRIRG357TW6KF6JAI7LWKAS6N \
  | 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: 09e2889b7dfcede517c9023ebb2812f371a2b6f3e1fd603436ed5c052bc78335

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c05e929f21ecc1c4388be1cf204852174a2f775ac66e3c0e96295feace1e85a1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-02-16T23:15:10Z",
    "title_canon_sha256": "bd1e733a731f81f1b6c40b684b679567a7237cd38e6f560747a9c2f645d76cfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0002313",
    "kind": "arxiv",
    "version": 1
  }
}