Pith Number

pith:HTHOVCT7

pith:2000:HTHOVCT7EUKCWFW3QP5FTZ7BR5

not attested not anchored not stored refs pending

First Results from the X-ray and Optical Survey of the Chandra Deep Field South

C. Norman, G. Hasinger, J. Bergeron, M. Nonino, P. Rosati, P. Tozzi, R. Giacconi, R. Gilli, R. Gilmozzi, S. Borgani, W. Zheng

arxiv:astro-ph/0007240 v2 · 2000-07-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HTHOVCT7EUKCWFW3QP5FTZ7BR5}

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	2026-07-04T16:16:54.940258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3cceea8a7f25142b16db83fa59e7e18f5cc810a19bff9a1a3fe58e15bfa17e75

Aliases

arxiv: astro-ph/0007240 · arxiv_version: astro-ph/0007240v2 · doi: 10.48550/arxiv.astro-ph/0007240 · pith_short_12: HTHOVCT7EUKC · pith_short_16: HTHOVCT7EUKCWFW3 · pith_short_8: HTHOVCT7

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/HTHOVCT7EUKCWFW3QP5FTZ7BR5 \
  | 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: 3cceea8a7f25142b16db83fa59e7e18f5cc810a19bff9a1a3fe58e15bfa17e75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e72a70494d648a5455775e8c4b6c41b9f5da4b6cde532b166e3de2df8c7467a5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-07-17T21:57:01Z",
    "title_canon_sha256": "c7303b773d5e8a39a59c424ac6537cfc49c57b1e346ae0b1dae4d78145a437c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0007240",
    "kind": "arxiv",
    "version": 2
  }
}