Pith Number

pith:PTLNY3GS

pith:2017:PTLNY3GSQVSELMYCXREYZJFETJ

not attested not anchored not stored refs pending

Extreme Variability in a Broad Absorption Line Quasar

Aaron J. Barth, Andrew J. Drake, Ashish A. Mahabal, Carter Chamberlain, Charles C. Steidel, Ciro Donalek, Daniel Stern, Eilat Glikman, Hyunsung D. Jun, Matthew J. Graham, Nahum Arav, S. G. Djorgovski

arxiv:1704.03923 v1 · 2017-04-12 · 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{PTLNY3GSQVSELMYCXREYZJFETJ}

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	2026-05-18T00:45:10.716642Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cd6dc6cd2856445b302bc498ca4a49a70cf9e7ae73ce9245e6e6106d43e77cc

Aliases

arxiv: 1704.03923 · arxiv_version: 1704.03923v1 · doi: 10.48550/arxiv.1704.03923 · pith_short_12: PTLNY3GSQVSE · pith_short_16: PTLNY3GSQVSELMYC · pith_short_8: PTLNY3GS

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/PTLNY3GSQVSELMYCXREYZJFETJ \
  | 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: 7cd6dc6cd2856445b302bc498ca4a49a70cf9e7ae73ce9245e6e6106d43e77cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9a17bcd0cd837d24b6dd257a429fdb3e4285750b790442fe468ac3b2234c393",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-04-12T20:41:51Z",
    "title_canon_sha256": "508a1e629f81f289b3cbab46a1b954f01eb936e5800649f778e6a47ed443bd9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.03923",
    "kind": "arxiv",
    "version": 1
  }
}