Pith Number

pith:DUAEH4PS

pith:2019:DUAEH4PSBGJUOFLQQQ4QNTZMXK

not attested not anchored not stored refs pending

Mass of the active galactic nucleus black hole XMMUJ134736.6+173403

Eva \v{S}r\'amkov\'a, Gabriel T\"or\"ok, Ji\v{r}\'i Hor\'ak, Kate\v{r}ina Goluchov\'a, Marek A. Abramowicz, Zden\v{e}k Stuchl\'ik

arxiv:1901.05419 v2 · 2019-01-16 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DUAEH4PSBGJUOFLQQQ4QNTZMXK}

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	2026-05-17T23:54:42.455972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d0043f1f20993471570843906cf2cbaa08b6d223c1e6251773d35cf14fbab8c

Aliases

arxiv: 1901.05419 · arxiv_version: 1901.05419v2 · doi: 10.48550/arxiv.1901.05419 · pith_short_12: DUAEH4PSBGJU · pith_short_16: DUAEH4PSBGJUOFLQ · pith_short_8: DUAEH4PS

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/DUAEH4PSBGJUOFLQQQ4QNTZMXK \
  | 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: 1d0043f1f20993471570843906cf2cbaa08b6d223c1e6251773d35cf14fbab8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea3565fec6c775754bfdadddf17f1a632f89b32aac9374aa45a990c49f58a6ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-01-16T18:17:00Z",
    "title_canon_sha256": "14b9f80caf9291433fea26bdf0e1afe8a91178350eb2cb886464ac8e444ab609"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.05419",
    "kind": "arxiv",
    "version": 2
  }
}