Pith Number

pith:YQZWLDUL

pith:2009:YQZWLDUL6466GCKDXMGRUPCPEM

not attested not anchored not stored refs pending

A Survey of UV Bright Sources Behind the Halo of M31

Andrew Fittingoff, Jasonjot S. Kalirai, Jay Strader, J. Xavier Prochaska, Kyle F. Kaplan, Puragra Guhathakurta

arxiv:0907.1688 v2 · 2009-07-09 · 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{YQZWLDUL6466GCKDXMGRUPCPEM}

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	2026-05-18T02:13:04.077792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c433658e8bf73de30943bb0d1a3c4f230636af77d8a92936bbb858321bc8f910

Aliases

arxiv: 0907.1688 · arxiv_version: 0907.1688v2 · doi: 10.48550/arxiv.0907.1688 · pith_short_12: YQZWLDUL6466 · pith_short_16: YQZWLDUL6466GCKD · pith_short_8: YQZWLDUL

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/YQZWLDUL6466GCKDXMGRUPCPEM \
  | 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: c433658e8bf73de30943bb0d1a3c4f230636af77d8a92936bbb858321bc8f910

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f351d3c5387320d7ef1dc8310fa336c7504eb8b980af3718fc82b9784648805e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-09T22:10:19Z",
    "title_canon_sha256": "5b4f9feaad8e652fcf9e8f264e890bb5a0864d7c7d4d5a1e2dcf2e2252618a68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.1688",
    "kind": "arxiv",
    "version": 2
  }
}