Pith Number

pith:QWH4ZTC6

pith:2013:QWH4ZTC6MQ7KQ2QGULWT5L6RM7

not attested not anchored not stored refs pending

The Violent Youth of Bright and Massive Cluster Galaxies and their Maturation over 7 Billion Years

Bego\~na Ascaso, Brian C. Lemaux, Dale D. Kocevski, Gordon Squires, Lori M. Lubin, Nicholas Rumbaugh, Roy R. Gal

arxiv:1309.6643 v2 · 2013-09-25 · 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{QWH4ZTC6MQ7KQ2QGULWT5L6RM7}

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	2026-05-18T01:47:26.586625Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858fcccc5e643ea86a06a2ed3eafd167ddefc20d7c8bdf7a6c7ccea4fd975860

Aliases

arxiv: 1309.6643 · arxiv_version: 1309.6643v2 · doi: 10.48550/arxiv.1309.6643 · pith_short_12: QWH4ZTC6MQ7K · pith_short_16: QWH4ZTC6MQ7KQ2QG · pith_short_8: QWH4ZTC6

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/QWH4ZTC6MQ7KQ2QGULWT5L6RM7 \
  | 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: 858fcccc5e643ea86a06a2ed3eafd167ddefc20d7c8bdf7a6c7ccea4fd975860

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9af89f868c5929d5611a6dd4bf3b681fd3b2de5df72caa147c7dfb0c74587876",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-25T20:00:03Z",
    "title_canon_sha256": "97b94920f97d7f648a42d25b631a19bffa5ce2202071f991ca061f83c50ee78b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6643",
    "kind": "arxiv",
    "version": 2
  }
}