Pith Number

pith:K5Q2XSL4

pith:2012:K5Q2XSL43NNWHO6ADK42D3LEQE

not attested not anchored not stored refs pending

The 4 Ms Chandra Deep Field-South Number Counts Apportioned by Source Class: Pervasive Active Galactic Nuclei and the Ascent of Normal Galaxies

A. Comastri, A.E. Hornschemeier, A. Ptak, B.D. Lehmer, B. Luo, C. Vignali, D.M. Alexander, D.P. Schneider, F.E. Bauer, M. Brusa, M. Paolillo, O. Shemmer, P. Tozzi, R. Gilli, W.N. Brandt, Y.Q. Xue

arxiv:1204.1977 v1 · 2012-04-09 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K5Q2XSL43NNWHO6ADK42D3LEQE}

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	2026-05-18T01:57:55.610921Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5761abc97cdb5b63bbc01ab9a1ed64812cd9b21365ce540bc9d9110c2c7e6197

Aliases

arxiv: 1204.1977 · arxiv_version: 1204.1977v1 · doi: 10.48550/arxiv.1204.1977 · pith_short_12: K5Q2XSL43NNW · pith_short_16: K5Q2XSL43NNWHO6A · pith_short_8: K5Q2XSL4

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/K5Q2XSL43NNWHO6ADK42D3LEQE \
  | 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: 5761abc97cdb5b63bbc01ab9a1ed64812cd9b21365ce540bc9d9110c2c7e6197

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b474502b6a65a357633c31e93328f12b367cb68369a1897b3da0c40f40fbe2fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-09T20:00:05Z",
    "title_canon_sha256": "415bee492bfcd82622faa8b08fa9d6ffcd1bd8f69816a4df39630a274757a2ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1977",
    "kind": "arxiv",
    "version": 1
  }
}