Pith Number

pith:PQRYCMT3

pith:2006:PQRYCMT3W6JQWLNB7EDNYUQZAJ

not attested not anchored not stored refs pending

Spitzer IRAC confirmation of z_850-dropout galaxies in the Hubble Ultra Deep Field: stellar masses and ages at z~7

(2) UC Santa Cruz, (3) Leiden Observatory), G.D. Illingworth (2), Ivo labbe (1), M. Franx (3) ((1) Carnegie Observatories, Rychard Bouwens (2)

arxiv:astro-ph/0608444 v2 · 2006-08-21 · 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{PQRYCMT3W6JQWLNB7EDNYUQZAJ}

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	2026-05-18T04:28:57.992758Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c2381327bb7930b2da1f906dc5219025bcaff10e17ba6fb5cf1dfe509e45522

Aliases

arxiv: astro-ph/0608444 · arxiv_version: astro-ph/0608444v2 · doi: 10.48550/arxiv.astro-ph/0608444 · pith_short_12: PQRYCMT3W6JQ · pith_short_16: PQRYCMT3W6JQWLNB · pith_short_8: PQRYCMT3

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/PQRYCMT3W6JQWLNB7EDNYUQZAJ \
  | 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: 7c2381327bb7930b2da1f906dc5219025bcaff10e17ba6fb5cf1dfe509e45522

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc5a3d4edc6dc95359e17250335b2c726514c6d64f3335bbd2e38f7248a96573",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-08-21T19:53:40Z",
    "title_canon_sha256": "f8442efebda0887601ae0bcff7d48e9154bbe203aae0b32e698d635267d6d632"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0608444",
    "kind": "arxiv",
    "version": 2
  }
}