Pith Number

pith:IA4F2S6Y

pith:2012:IA4F2S6Y3NZK5Y2KFGLIU7CB7T

not attested not anchored not stored refs pending

VLBI for Gravity Probe B. VII. The Evolution of the Radio Structure of IM Pegasi

D. E. Lebach, I. I. Shapiro, M. F. Bietenholz, M. I. Ratner, N. Bartel, R. R. Ransom

arxiv:1204.4645 v1 · 2012-04-20 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IA4F2S6Y3NZK5Y2KFGLIU7CB7T}

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	2026-05-18T01:57:48.086127Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

40385d4bd8db72aee34a29968a7c41fcecee9073ee923fde6dd7640125aaf367

Aliases

arxiv: 1204.4645 · arxiv_version: 1204.4645v1 · doi: 10.48550/arxiv.1204.4645 · pith_short_12: IA4F2S6Y3NZK · pith_short_16: IA4F2S6Y3NZK5Y2K · pith_short_8: IA4F2S6Y

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/IA4F2S6Y3NZK5Y2KFGLIU7CB7T \
  | 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: 40385d4bd8db72aee34a29968a7c41fcecee9073ee923fde6dd7640125aaf367

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "956b82393d01b1cbe31f263ce26eb788af83b6b62764a8093eebec2460b5bc67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-04-20T14:29:24Z",
    "title_canon_sha256": "0699fc04a979977b5db6a3bdcb97badcbcd3912f05b105045abf21beab9bc734"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4645",
    "kind": "arxiv",
    "version": 1
  }
}