Pith Number

pith:Q2ZK7WMC

pith:2016:Q2ZK7WMCZ7AEVSB7GQNIACEDNY

not attested not anchored not stored refs pending

The 2 Ms Chandra Deep Field-North Survey and the 250 ks Extended Chandra Deep Field-South Survey: Improved Point-Source Catalogs

B. D. Lehmer, B. Luo, D. M. Alexander, F. E. Bauer, G. Yang, W. N. Brandt, Y. Q. Xue

arxiv:1602.06299 v1 · 2016-02-19 · astro-ph.GA · 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{Q2ZK7WMCZ7AEVSB7GQNIACEDNY}

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	2026-05-18T01:12:48.901573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86b2afd982cfc04ac83f341a8008836e0cd2af8e22fdea1283707cfe83316dd5

Aliases

arxiv: 1602.06299 · arxiv_version: 1602.06299v1 · doi: 10.48550/arxiv.1602.06299 · pith_short_12: Q2ZK7WMCZ7AE · pith_short_16: Q2ZK7WMCZ7AEVSB7 · pith_short_8: Q2ZK7WMC

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/Q2ZK7WMCZ7AEVSB7GQNIACEDNY \
  | 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: 86b2afd982cfc04ac83f341a8008836e0cd2af8e22fdea1283707cfe83316dd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ac19fd94ac3f0fea3cbde33228c7e3c3307fe3fff36f8faf682b0d54e2aea83",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-02-19T21:00:01Z",
    "title_canon_sha256": "bad18d68fa5f7b967a7388d34a870fbf5a371438b7b582af7a49d131271cee84"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.06299",
    "kind": "arxiv",
    "version": 1
  }
}