Pith Number

pith:HUG2QWV2

pith:2012:HUG2QWV2MF7L2BIRDGC6DXSGG2

not attested not anchored not stored refs pending

The M31 Velocity Vector. I. Hubble Space Telescope Proper Motion Measurements

Jay Anderson, Roeland P. van der Marel (STScI), Sangmo Tony Sohn

arxiv:1205.6863 v1 · 2012-05-31 · 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{HUG2QWV2MF7L2BIRDGC6DXSGG2}

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	2026-05-18T03:42:46.044229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d0da85aba617ebd05111985e1de4636b238b0d22af3a20b1948767888a9f60d

Aliases

arxiv: 1205.6863 · arxiv_version: 1205.6863v1 · doi: 10.48550/arxiv.1205.6863 · pith_short_12: HUG2QWV2MF7L · pith_short_16: HUG2QWV2MF7L2BIR · pith_short_8: HUG2QWV2

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/HUG2QWV2MF7L2BIRDGC6DXSGG2 \
  | 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: 3d0da85aba617ebd05111985e1de4636b238b0d22af3a20b1948767888a9f60d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dce765832b7618b844ade5ffb05f1766d593718d84c64d3d0acd17c6d8464a5c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-05-31T00:57:24Z",
    "title_canon_sha256": "d520f7dfd59c9a77355de4c372e77a03d992b7cb4a16419a01269bf9920e7bf0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.6863",
    "kind": "arxiv",
    "version": 1
  }
}