Pith Number

pith:TO56SPXW

pith:2019:TO56SPXWPS2J32PAXCRI4WMWQY

not attested not anchored not stored refs pending

An upper limit on primordial magnetic fields from ultra-faint dwarf galaxies

Abraham Loeb, Mohammadtaher Safarzadeh

arxiv:1901.03341 v2 · 2019-01-10 · astro-ph.CO · 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{TO56SPXWPS2J32PAXCRI4WMWQY}

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	2026-05-17T23:44:12.376357Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9bbbe93ef67cb49de9e0b8a28e599686145a7a48ae88e57956cfde71c1d7e94c

Aliases

arxiv: 1901.03341 · arxiv_version: 1901.03341v2 · doi: 10.48550/arxiv.1901.03341 · pith_short_12: TO56SPXWPS2J · pith_short_16: TO56SPXWPS2J32PA · pith_short_8: TO56SPXW

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/TO56SPXWPS2J32PAXCRI4WMWQY \
  | 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: 9bbbe93ef67cb49de9e0b8a28e599686145a7a48ae88e57956cfde71c1d7e94c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e9508acd7c2df2611e3b4950ce167e4a72d5420c321c78ca078af8fe9e42806",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-01-10T19:00:02Z",
    "title_canon_sha256": "0fb30af1b20049a4aa128fc6039c75d54c67205cac449f77a29b4234ddfd01a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03341",
    "kind": "arxiv",
    "version": 2
  }
}