Pith Number

pith:XGG7W3LV

pith:2009:XGG7W3LV7L4MQ47SJIPW5XLPVA

not attested not anchored not stored refs pending

RR Lyrae Variables in Two Fields in the Spheroid of M31

Alan Dressler, Ata Sarajedini, Carl Grillmair, Conor L. Mancone, Kenneth J. Mighell, S. C. Trager, Tod R. Lauer, Wendy Freedman

arxiv:0904.4290 v1 · 2009-04-28 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XGG7W3LV7L4MQ47SJIPW5XLPVA}

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	2026-05-18T02:13:56.825257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b98dfb6d75faf8c873f24a1f6edd6fa8227dfb528f42e86507662e6acc846e98

Aliases

arxiv: 0904.4290 · arxiv_version: 0904.4290v1 · doi: 10.48550/arxiv.0904.4290 · pith_short_12: XGG7W3LV7L4M · pith_short_16: XGG7W3LV7L4MQ47S · pith_short_8: XGG7W3LV

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/XGG7W3LV7L4MQ47SJIPW5XLPVA \
  | 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: b98dfb6d75faf8c873f24a1f6edd6fa8227dfb528f42e86507662e6acc846e98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc66de24c28a28069656c76b691f922aa4c405180563e1b3c50c18f2249a8750",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-04-28T01:21:07Z",
    "title_canon_sha256": "c98ca9e81ac30508600214cdd29fcd62e746593bf33d93315d61723b5f7d162e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4290",
    "kind": "arxiv",
    "version": 1
  }
}