Pith Number

pith:4QD6ZJGM

pith:2015:4QD6ZJGMP56QQCPEOLC4ZYCNWA

not attested not anchored not stored refs pending

An X-shooter composite of bright 1 < z < 2 quasars from UV to infrared

Jens-Kristian Krogager (1) ((1) DARK NBI), Johan P. U. Fynbo (1), Jonatan Selsing (1), Lise Christensen (1)

arxiv:1510.08058 v1 · 2015-10-27 · astro-ph.GA · 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{4QD6ZJGMP56QQCPEOLC4ZYCNWA}

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	2026-05-18T01:23:54.802169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e407eca4cc7f7d0809e472c5cce04db02af8bca573d05c1c41270b07af1b327b

Aliases

arxiv: 1510.08058 · arxiv_version: 1510.08058v1 · doi: 10.48550/arxiv.1510.08058 · pith_short_12: 4QD6ZJGMP56Q · pith_short_16: 4QD6ZJGMP56QQCPE · pith_short_8: 4QD6ZJGM

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/4QD6ZJGMP56QQCPEOLC4ZYCNWA \
  | 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: e407eca4cc7f7d0809e472c5cce04db02af8bca573d05c1c41270b07af1b327b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11d4695e32079df7515cf8e8aabd55d03e617f230e9927ece76130d726a3a04c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-10-27T20:04:50Z",
    "title_canon_sha256": "c8fad420c6c7305a32ea203970d80e9539bbeb87cb97954b431cff575bb84618"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.08058",
    "kind": "arxiv",
    "version": 1
  }
}