Pith Number

pith:SUQJNU6B

pith:2009:SUQJNU6BDN5ELWH32UPU7HWOF2

not attested not anchored not stored refs pending

Red Supergiants in the Andromeda Galaxy (M31)

Andre Maeder, Bertrand Plez, David R. Silva, Emily M. Levesque, Geoffrey C. Clayton, Georges Meynet, Knut A. G. Olsen, Philip Massey

arxiv:0907.3767 v1 · 2009-07-22 · astro-ph.GA · 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{SUQJNU6BDN5ELWH32UPU7HWOF2}

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	2026-05-18T02:12:54.827754Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

952096d3c11b7a45d8fbd51f4f9ece2e8524d21daf458c7b3cd1faa18ef68db4

Aliases

arxiv: 0907.3767 · arxiv_version: 0907.3767v1 · doi: 10.48550/arxiv.0907.3767 · pith_short_12: SUQJNU6BDN5E · pith_short_16: SUQJNU6BDN5ELWH3 · pith_short_8: SUQJNU6B

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/SUQJNU6BDN5ELWH32UPU7HWOF2 \
  | 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: 952096d3c11b7a45d8fbd51f4f9ece2e8524d21daf458c7b3cd1faa18ef68db4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9603be2102cad78af5703d32e791f1698098444950ef6624651b910d14e7cdb",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-07-22T02:40:36Z",
    "title_canon_sha256": "0e934046da4eb81ca120cf0755479d9ddd90bfa549c08cb201a0aa6201d81db9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.3767",
    "kind": "arxiv",
    "version": 1
  }
}