Pith Number

pith:XSHY4TQA

pith:2013:XSHY4TQAFWF4YMDBDJ5ZH3RIQQ

not attested not anchored not stored refs pending

Weak Hard X-ray Emission from Two Broad Absorption Line Quasars Observed with NuSTAR: Compton-thick Absorption or Intrinsic X-ray Weakness?

A. C. Fabian, A. Comastri, B. Luo, B. W. Grefenstette, C. J. Hailey, C.Saez, D. Farrah, D. J. Walton, D. M. Alexander, D. Stern, F. A. Harrison, F. E. Bauer, F. E. Christensen, F. Fiore, F. Fuerst, G. Matt, G. Risaliti, K. K. Madsen, P. Ogle, R. Hickox, S. E. Boggs, S. H. Teng, W. N. Brandt, W. W. Craig, W. W. Zhang

arxiv:1306.3500 v1 · 2013-06-14 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XSHY4TQAFWF4YMDBDJ5ZH3RIQQ}

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	2026-05-18T01:49:16.772695Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc8f8e4e002d8bcc30611a7b93ee28842b70cb23b1bf50948098a2d04c342c52

Aliases

arxiv: 1306.3500 · arxiv_version: 1306.3500v1 · doi: 10.48550/arxiv.1306.3500 · pith_short_12: XSHY4TQAFWF4 · pith_short_16: XSHY4TQAFWF4YMDB · pith_short_8: XSHY4TQA

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/XSHY4TQAFWF4YMDBDJ5ZH3RIQQ \
  | 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: bc8f8e4e002d8bcc30611a7b93ee28842b70cb23b1bf50948098a2d04c342c52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f3f312f72900d9e831e5bbbaa6e151a6b9f37ee1a32b47982ee74db60668e8a",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-06-14T20:00:01Z",
    "title_canon_sha256": "269231d98e656bd13e2360b7c9193e87034ae94049d6d5c45ba5bd3d740a72b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3500",
    "kind": "arxiv",
    "version": 1
  }
}