Pith Number

pith:F2YIRDOO

pith:2005:F2YIRDOOIPBZJDY2ILJP4NORZ3

not attested not anchored not stored refs pending

The First Chandra Field

C\'edric Foellmi, Kinwah Wu, Martin C. Weisskopf, Poshak Gandhi, Robert A. Cameron, Ronald F. Elsner, Sandeep K. Patel, Stephen L. O'Dell, Thomas L. Aldcroft

arxiv:astro-ph/0509053 v1 · 2005-09-02 · 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{F2YIRDOOIPBZJDY2ILJP4NORZ3}

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	2026-07-04T17:15:05.877725Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2eb0888dce43c3948f1a42d2fe35d1ced8f1b0a1b9bdc52cb51e5b9e80b0b64b

Aliases

arxiv: astro-ph/0509053 · arxiv_version: astro-ph/0509053v1 · doi: 10.48550/arxiv.astro-ph/0509053 · pith_short_12: F2YIRDOOIPBZ · pith_short_16: F2YIRDOOIPBZJDY2 · pith_short_8: F2YIRDOO

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/F2YIRDOOIPBZJDY2ILJP4NORZ3 \
  | 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: 2eb0888dce43c3948f1a42d2fe35d1ced8f1b0a1b9bdc52cb51e5b9e80b0b64b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c33dde43c9cd5781864de284baecec9eb55b07ddcf9ee5cc59b10137c0a9085e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-09-02T14:41:22Z",
    "title_canon_sha256": "903dc2cefb48987d0607e3b4622b383c4a25eeef8a3c5c6e5b49b4cf87726c25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0509053",
    "kind": "arxiv",
    "version": 1
  }
}