Pith Number

pith:WDCHPTFV

pith:2021:WDCHPTFVXPCP3G7HERL5LB5TF6

not attested not anchored not stored refs pending

Extremely weak CO emission in IZw 18

Junzhi Wang, Luwenjia Zhou, Yong Shi, Zhi-Yu Zhang

arxiv:2109.07856 v1 · 2021-09-16 · 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{WDCHPTFVXPCP3G7HERL5LB5TF6}

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	2026-07-05T03:18:22.139022Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0c477ccb5bbc4fd9be72457d587b32fa1f032abc8b33c742d7f70127c79772a

Aliases

arxiv: 2109.07856 · arxiv_version: 2109.07856v1 · doi: 10.48550/arxiv.2109.07856 · pith_short_12: WDCHPTFVXPCP · pith_short_16: WDCHPTFVXPCP3G7H · pith_short_8: WDCHPTFV

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/WDCHPTFVXPCP3G7HERL5LB5TF6 \
  | 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: b0c477ccb5bbc4fd9be72457d587b32fa1f032abc8b33c742d7f70127c79772a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "361a3c766c928dc3ee6e38a680cfaa782523cdd0b051fc1d98c27dc1ebcc74b8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-16T10:37:56Z",
    "title_canon_sha256": "0986294a14910e7c5747209b9c4551bc8a89ed14cd73f7ae9aaebefb0313fad6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.07856",
    "kind": "arxiv",
    "version": 1
  }
}