Pith Number

pith:7TSB3D56

pith:2009:7TSB3D562DCDUOCGSVMYQGAWOH

not attested not anchored not stored refs pending

RR Lyrae variables in M32 and the disk of M31

Abhijit Saha, Alan Dressler, Antonela Monachesi, Carl Grillmair, Eline Tolstoy, Giuliana Fiorentino, Kenneth J. Mighell, Scott C. Trager, Tod R. Lauer, Wendy Freedman

arxiv:0911.0355 v1 · 2009-11-02 · 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{7TSB3D562DCDUOCGSVMYQGAWOH}

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	2026-05-18T02:34:12.178113Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fce41d8fbed0c43a3846955988181671e4847512fae596e32263587ce2505774

Aliases

arxiv: 0911.0355 · arxiv_version: 0911.0355v1 · doi: 10.48550/arxiv.0911.0355 · pith_short_12: 7TSB3D562DCD · pith_short_16: 7TSB3D562DCDUOCG · pith_short_8: 7TSB3D56

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/7TSB3D562DCDUOCGSVMYQGAWOH \
  | 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: fce41d8fbed0c43a3846955988181671e4847512fae596e32263587ce2505774

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de02c084953df3c4ca0798e284eeef8ccd4cc3887b1c63b9ce285637bbaf8544",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-02T16:46:52Z",
    "title_canon_sha256": "bae2c9958f0e55c42bb5857908b656308fd4f87c572749df79d6441286d19171"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0355",
    "kind": "arxiv",
    "version": 1
  }
}