Pith Number

pith:7MIE42IE

pith:2015:7MIE42IET3JUX6WYMJPHMKIZEB

not attested not anchored not stored refs pending

NuSTAR Reveals Extreme Absorption in z < 0.5 Type 2 Quasars

A. Annuar, A. Comastri, A. Del Moro, B. Luo, B. W. Grefenstette, C. J. Hailey, C. Vignali, D. M. Alexander, D. R. Ballantyne, D. Stern, E. Treister, F. A. Harrison, F. Civano, F. E. Bauer, F. E. Christensen, G. B. Lansbury (Durham), J. Aird, L. Zappacosta, M. Balokovic, M. Brightman, M. Koss, P. Gandhi, R. C. Hickox, R. J. Assef, S. E. Boggs, S. M. LaMassa, S. Puccetti, W. N. Brandt, W. W. Craig, W. W. Zhang

arxiv:1506.05120 v1 · 2015-06-16 · 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{7MIE42IET3JUX6WYMJPHMKIZEB}

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	2026-05-18T01:35:07.587415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb104e69049ed34bfad8625e762919204cff7429c9680767718353c43658f31d

Aliases

arxiv: 1506.05120 · arxiv_version: 1506.05120v1 · doi: 10.48550/arxiv.1506.05120 · pith_short_12: 7MIE42IET3JU · pith_short_16: 7MIE42IET3JUX6WY · pith_short_8: 7MIE42IE

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/7MIE42IET3JUX6WYMJPHMKIZEB \
  | 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: fb104e69049ed34bfad8625e762919204cff7429c9680767718353c43658f31d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3471664e414cb13b45ffc5892607cb6d5305e265c44cb8880cd1fc7f6aa7f0c8",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2015-06-16T20:01:27Z",
    "title_canon_sha256": "8f4a89263ca007638f6d99950277f079bf19ca17f167e30ba42872bca78d8b67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.05120",
    "kind": "arxiv",
    "version": 1
  }
}