Pith Number

pith:GFTZU2CV

pith:2015:GFTZU2CVEZ5QQP2EWVLZEREXAY

not attested not anchored not stored refs pending

The most obscured AGN in the COSMOS field

A. Comastri, C. Gruppioni, C. Vignali, F. Pozzi, G. Lanzuisi, G. Vietri, G. Zamorani, I. Delvecchio, M. Brusa, M. Mignoli, M. Perna, N. Cappelluti, R. Gilli, S. Berta

arxiv:1505.01153 v1 · 2015-05-05 · 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{GFTZU2CVEZ5QQP2EWVLZEREXAY}

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	2026-05-18T02:16:50.452200Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863

Aliases

arxiv: 1505.01153 · arxiv_version: 1505.01153v1 · doi: 10.48550/arxiv.1505.01153 · pith_short_12: GFTZU2CVEZ5Q · pith_short_16: GFTZU2CVEZ5QQP2E · pith_short_8: GFTZU2CV

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/GFTZU2CVEZ5QQP2EWVLZEREXAY \
  | 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: 31679a6855267b083f44b5579244970639d3704ec0b6e6f2339b373b63a28863

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5bb5a0c0a302391b66fdcdf49764146eea130e0111c6c5bb3a35912b9ad38100",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-05-05T20:00:32Z",
    "title_canon_sha256": "a00e9069f62dede6b9f66fd1ce9eb7e7effd482e8f41990abf5ee6646e56341f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.01153",
    "kind": "arxiv",
    "version": 1
  }
}