Pith Number

pith:423OIL7Y

pith:2015:423OIL7Y7EFS3BX7ZEWG5QKBZ3

not attested not anchored not stored refs pending

A search for H$\alpha$ emission in high-metallicity damped Lyman-$\alpha$ systems at $z \sim 2.4$

2), (2) Canada-France-Hawaii Telescope, (3) National Centre for Radio Astrophysics, (4) UCO/Lick Observatory, Astrophysics, India, J. Xavier Prochaska (4) ((1) Academia Sinica Institute of Astronomy, Nissim Kanekar (3), Taiwan, USA, USA), Wei-Hao Wang (1

arxiv:1501.05897 v1 · 2015-01-23 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{423OIL7Y7EFS3BX7ZEWG5QKBZ3}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:41:08.989719Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6b6e42ff8f90b2d86ffc92c6ec141ceeb91ee7e2f85b1899853a788fcfb3c3b

Aliases

arxiv: 1501.05897 · arxiv_version: 1501.05897v1 · doi: 10.48550/arxiv.1501.05897 · pith_short_12: 423OIL7Y7EFS · pith_short_16: 423OIL7Y7EFS3BX7 · pith_short_8: 423OIL7Y

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/423OIL7Y7EFS3BX7ZEWG5QKBZ3 \
  | 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: e6b6e42ff8f90b2d86ffc92c6ec141ceeb91ee7e2f85b1899853a788fcfb3c3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8571648fd2190ffc529ad37a226bbe7b8ec287addfafbd35b5ebcb75224e0513",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-01-23T18:14:40Z",
    "title_canon_sha256": "a2a33df28a4b6fc7388f6524163d048159d459638165255cdbc8bb5f4ec2dac3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.05897",
    "kind": "arxiv",
    "version": 1
  }
}