Pith Number

pith:IGNRGD36

pith:2017:IGNRGD36P3X2F43GJJRCNGACDP

not attested not anchored not stored refs pending

Multi-color optical monitoring of the quasar 3C 273 from 2005 to 2016

Dingrong Xiong, Haojing Zhang, Jinming Bai, Junhui Fan, Minfeng Gu, Tingfeng Yi, Xiong Zhang

arxiv:1703.01645 v2 · 2017-03-05 · 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{IGNRGD36P3X2F43GJJRCNGACDP}

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	2026-05-18T00:47:00.992816Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

419b130f7e7eefa2f3664a622698021bde624fa0bf771f29fb1306b030b12ce1

Aliases

arxiv: 1703.01645 · arxiv_version: 1703.01645v2 · doi: 10.48550/arxiv.1703.01645 · pith_short_12: IGNRGD36P3X2 · pith_short_16: IGNRGD36P3X2F43G · pith_short_8: IGNRGD36

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/IGNRGD36P3X2F43GJJRCNGACDP \
  | 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: 419b130f7e7eefa2f3664a622698021bde624fa0bf771f29fb1306b030b12ce1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f439c726fee12284778f3afb7e7b4352acdb23d4bf48343b713883ab3d665f66",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-03-05T18:58:06Z",
    "title_canon_sha256": "394d0c8dfcf66f09bbf6961ac2c8ee525de18eda9c7cd7683885f1f7e55b37b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.01645",
    "kind": "arxiv",
    "version": 2
  }
}