Pith Number

pith:BUUCLCA6

pith:2009:BUUCLCA6H5CDFX3W4IDWOLWK4A

not attested not anchored not stored refs pending

The Chandra Deep Protocluster Survey: Point-Source Catalogs for a 400 ks Observation of the z = 3.09 Protocluster in SSA22

A. M. Swinbank, B. D. Lehmer, D. M. Alexander, F. E. Bauer, Ian Smail, J. E. Geach, J. R. Mullaney, S. C. Chapman, W. N. Brandt, Y. Matsuda

arxiv:0907.4369 v1 · 2009-07-24 · 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{BUUCLCA6H5CDFX3W4IDWOLWK4A}

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	2026-05-18T02:12:53.751904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d2825881e3f4432df76e207672ecae03a41caaca48d190df72b5c0bb02813f0

Aliases

arxiv: 0907.4369 · arxiv_version: 0907.4369v1 · doi: 10.48550/arxiv.0907.4369 · pith_short_12: BUUCLCA6H5CD · pith_short_16: BUUCLCA6H5CDFX3W · pith_short_8: BUUCLCA6

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/BUUCLCA6H5CDFX3W4IDWOLWK4A \
  | 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: 0d2825881e3f4432df76e207672ecae03a41caaca48d190df72b5c0bb02813f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "519a6169b0779aaf230aa14464cef69340c6120f09f10209f7a9a8ce12439590",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-24T20:17:31Z",
    "title_canon_sha256": "cc793d1d2b3a2b995b4b62bbe1be0bf31234b001ba93b8340fa689534dac29a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4369",
    "kind": "arxiv",
    "version": 1
  }
}