Pith Number

pith:7EOEFIER

pith:2017:7EOEFIER5RNORBCRV2XSEVX2SK

not attested not anchored not stored refs pending

The population of SNe/SNRs in the starburst galaxy Arp 220. A self-consistent analysis of 20 years of VLBI monitoring

A. Alberdi, C. J. Lonsdale, E. Varenius, F. Batejat, I. Mart\'i-Vidal, J. E. Conway, M. A. P\'erez-Torres, P. Diamond, S. Aalto

arxiv:1702.04772 v2 · 2017-02-15 · 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{7EOEFIER5RNORBCRV2XSEVX2SK}

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	2026-05-17T23:49:44.388361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f91c42a091ec5ae88451aeaf2256fa9288513992dbb71fb3656cb4c7b58637a7

Aliases

arxiv: 1702.04772 · arxiv_version: 1702.04772v2 · doi: 10.48550/arxiv.1702.04772 · pith_short_12: 7EOEFIER5RNO · pith_short_16: 7EOEFIER5RNORBCR · pith_short_8: 7EOEFIER

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/7EOEFIER5RNORBCRV2XSEVX2SK \
  | 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: f91c42a091ec5ae88451aeaf2256fa9288513992dbb71fb3656cb4c7b58637a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7939402958ec4752dfd23ff305f2282ec931a1ad3c7f0ed461020e7ea619800",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-02-15T21:00:39Z",
    "title_canon_sha256": "34f0d9808ba4d328086e931f2296329a5f3bd56c46f66654bcb298fd0466a303"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.04772",
    "kind": "arxiv",
    "version": 2
  }
}