Pith Number

pith:WNQ44RXG

pith:2021:WNQ44RXGKMEHAAXBC5HFLGPNYN

not attested not anchored not stored refs pending

Big and young supermassive black holes in the early Universe

Tullia Sbarrato

arxiv:2107.09940 v1 · 2021-07-21 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WNQ44RXGKMEHAAXBC5HFLGPNYN}

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.

Cited by

1 paper in Pith

Supermassive black holes and their surroundings: MeV signatures

Receipt and verification

First computed	2026-07-05T02:59:41.309967Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b361ce46e653087002e1174e5599edc37fc3e6af5f875dcfb1c6b6f9e9b53166

Aliases

arxiv: 2107.09940 · arxiv_version: 2107.09940v1 · doi: 10.48550/arxiv.2107.09940 · pith_short_12: WNQ44RXGKMEH · pith_short_16: WNQ44RXGKMEHAAXB · pith_short_8: WNQ44RXG

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/WNQ44RXGKMEHAAXBC5HFLGPNYN \
  | 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: b361ce46e653087002e1174e5599edc37fc3e6af5f875dcfb1c6b6f9e9b53166

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "715a217f90014289de1bbab9bdf1dd89c275e05b10aaf0fa21a93365022ef0da",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2021-07-21T08:30:23Z",
    "title_canon_sha256": "2d049477fa803f084a23ef398be7407692e5cc0c6313eaee3904e4fb0d3fc0db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.09940",
    "kind": "arxiv",
    "version": 1
  }
}