Pith Number

pith:ER4RRGDP

pith:2009:ER4RRGDPLEA7JLNP6IMGFKPLZ5

not attested not anchored not stored refs pending

Hubble Space Telescope Weak-lensing Study of the Galaxy Cluster XMMU J2235.3-2557 at z=1.4: A Surprisingly Massive Galaxy Cluster when the Universe is One-third of its Current Age

C. Lidman (ESO), C. Mullis (Wachovia), H. B\"ohringer (MPI), H. C. Ford (JHU), K. S. Dawson (UoU), M. J. Jee (UCD), P. Rosati (ESO), R. Demarco (UdeC), R. Fassbender (MPI), S. Perlmutter (LBL), V. Strazzullo (NRAO)

arxiv:0908.3897 v1 · 2009-08-26 · 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{ER4RRGDPLEA7JLNP6IMGFKPLZ5}

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	2026-05-18T02:12:22.517489Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

247918986f5901f4adaff21862a9ebcf77b385d0b5de7d15fa75522cb25c8767

Aliases

arxiv: 0908.3897 · arxiv_version: 0908.3897v1 · doi: 10.48550/arxiv.0908.3897 · pith_short_12: ER4RRGDPLEA7 · pith_short_16: ER4RRGDPLEA7JLNP · pith_short_8: ER4RRGDP

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/ER4RRGDPLEA7JLNP6IMGFKPLZ5 \
  | 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: 247918986f5901f4adaff21862a9ebcf77b385d0b5de7d15fa75522cb25c8767

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38663e9558bbaacdd8063aea2f1e570cebb10bad1fcd57f2d8602d94ee2d8513",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-26T20:04:01Z",
    "title_canon_sha256": "3c22cb407ebdf205b652e97a8c21001e81ec8800824d608da1e7bcedb70cc410"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3897",
    "kind": "arxiv",
    "version": 1
  }
}