Pith Number

pith:IETKFZWI

pith:2018:IETKFZWIF6OESTOGENZK4RL2E7

not attested not anchored not stored refs pending

The Andromeda galaxy's most important merger about 2 billion years ago as M32's likely progenitor

Eric F. Bell, Richard D'Souza

arxiv:1807.08819 v1 · 2018-07-23 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IETKFZWIF6OESTOGENZK4RL2E7}

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.

Cited by

1 paper in Pith

Co-evolution of Supermassive Black Holes and their Host L* galaxies: implications for Milky Way and M31

Receipt and verification

First computed	2026-05-18T00:09:57.737210Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4126a2e6c82f9c494dc62372ae457a27ff4351b7a0ba38dd6d4da087b0f377fe

Aliases

arxiv: 1807.08819 · arxiv_version: 1807.08819v1 · doi: 10.48550/arxiv.1807.08819 · pith_short_12: IETKFZWIF6OE · pith_short_16: IETKFZWIF6OESTOG · pith_short_8: IETKFZWI

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/IETKFZWIF6OESTOGENZK4RL2E7 \
  | 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: 4126a2e6c82f9c494dc62372ae457a27ff4351b7a0ba38dd6d4da087b0f377fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d767797bf699b8fa6cbe934ac2745fd267c78129629eff14b320c0b8b2ba45f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-07-23T20:38:27Z",
    "title_canon_sha256": "b87d11dac7ff90a894e67e7c59dc268ecb5ec1f1ac73cdf9055c32a9e832237a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08819",
    "kind": "arxiv",
    "version": 1
  }
}