Pith Number

pith:J6V2S3KJ

pith:2021:J6V2S3KJ4QEGAPTEMRL6VBNXQW

not attested not anchored not stored refs pending

PS J1721+8842: A gravitationally lensed dual AGN system at redshift 2.37 with two radio components

C. S. Mangat, D. Wen, H. R. Stacey, J. P. McKean, P. Hartley, R. Brilenkov, S. Vegetti

arxiv:2109.03253 v1 · 2021-09-07 · 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{J6V2S3KJ4QEGAPTEMRL6VBNXQW}

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	2026-07-05T03:16:24.191488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4faba96d49e408603e646457ea85b7858138687bba814f5acfb1288761692b81

Aliases

arxiv: 2109.03253 · arxiv_version: 2109.03253v1 · doi: 10.48550/arxiv.2109.03253 · pith_short_12: J6V2S3KJ4QEG · pith_short_16: J6V2S3KJ4QEGAPTE · pith_short_8: J6V2S3KJ

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/J6V2S3KJ4QEGAPTEMRL6VBNXQW \
  | 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: 4faba96d49e408603e646457ea85b7858138687bba814f5acfb1288761692b81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc4dd1b21160f442201d7b72aacccc8da5f19f3ef18d26a6811c78fd1bebd323",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-07T18:00:04Z",
    "title_canon_sha256": "9bf7d1358af505d7017ef4b3ee9c302367435e56d1921c39fb741ced2d036872"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.03253",
    "kind": "arxiv",
    "version": 1
  }
}