Pith Number

pith:QUC7G6BY

pith:2010:QUC7G6BYDMJPWF75GR64NQHNW7

not attested not anchored not stored refs pending

A newly discovered DLA and associated Ly-alpha emission in the spectra of the gravitationally lensed quasar UM 673A,B

2), (2) International Centre for Radio Astronomy Research, (3) California Institute of Technology, (4) Leiden Observatory), Charles C. Steidel (3), Gwen C. Rudie (3), Lindsay J. King (1), Max Pettini (1, Olivera Rakic (4) ((1) Institute of Astronomy, Ryan Cooke (1), University of Cambridge, University of Western Australia

arxiv:1007.1409 v2 · 2010-07-08 · 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{QUC7G6BYDMJPWF75GR64NQHNW7}

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	2026-05-18T02:06:23.813076Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8505f378381b12fb17fd347dc6c0edb7eda7d7767475cdf5935e616994be8e82

Aliases

arxiv: 1007.1409 · arxiv_version: 1007.1409v2 · doi: 10.48550/arxiv.1007.1409 · pith_short_12: QUC7G6BYDMJP · pith_short_16: QUC7G6BYDMJPWF75 · pith_short_8: QUC7G6BY

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/QUC7G6BYDMJPWF75GR64NQHNW7 \
  | 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: 8505f378381b12fb17fd347dc6c0edb7eda7d7767475cdf5935e616994be8e82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f20e48108ad0f8f7557ba47165b274bd47584230673e09bcbd44fb9fbb327438",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-07-08T16:06:36Z",
    "title_canon_sha256": "35e1c3d281ed0002e0a1a00f23b7e6cf55de9731f32d4b32712434284c3d4ac1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.1409",
    "kind": "arxiv",
    "version": 2
  }
}