CHC-FRC-VP1: Official CHIME/FRB Exposure-Injection Selection-Stress Gates

VP0 establishes a catalog-side CHIME/FRB selection-stress result for FRC. VP1 adds two public selection-control layers: an injection-assisted completeness stress lane and an exposure-context stress lane. This analysis reports a declared public-data stress result on the stated CHIME/FRB exposure and injection route. The result may be used in FRC only as declared-window compatibility under visible CHIME/FRB exposure and injection controls.

The CHIME/FRB Open Data catalog tutorial states that Catalog 1 data are available from the official CHIME/FRB website in CSV and FITS formats and gives the Catalog 1 column route, including sky position, exposure columns, SNR, DM, excess-DM proxies, fluence, and exclusion flags [citation]. The First CHIME/FRB Catalog is the Catalog 1 scientific reference used for the public table and the selection-calibration context [citation]. The injection tutorial states that the Catalog 1 injection dataset has two files: a full HDF5 file with five million synthetic FRBs and a pickle/DataFrame file for the subset actually injected into the live CHIME/FRB intensity stream, described as about 85,000 events [citation]. The exposure tutorial gives a Catalog 1 exposure-map route through CHIME/FRB Open Data and points to the exposure data in CANFAR [citation]. The beam-model tutorial describes the Catalog 1 beam model used for analyses and gives the sensitivity-calculation interface [citation]. The injection system paper explains that injections are used to map intrinsic burst properties to expected SNR while accounting for telescope characteristics such as beam model and calibration factors [citation].

The declared VP1 evaluation used the following public data objects: center

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center The larger injection and exposure objects are listed in the companion source summary under the declared official-input objects; their public-source basis is recorded there together with the replay diagnostic summary.

Let $C$TeXC be the official Catalog 1 table and $I$TeXI the official live-injected table. The staged column map is center

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center

For declared fluence quantiles $q\in\{0.5,0.6,0.7,0.8\}$TeXq\in\{0.5,0.6,0.7,0.8\}, define

\epsilon(q)=\frac{\#\{i\in I:F_I(i)\ge Q_q(F_I),\ D_I(i)=1\}}{\#\{i\in I:F_I(i)\ge Q_q(F_I)\}},

where $D_I$TeXD_I is the declared Catalog 1 pipeline detection mask. The primary injection stability score is

S_{\rm inj}=\frac{\operatorname{sd}_{q}\epsilon(q)}{\operatorname{mean}_{q}\epsilon(q)}.

Exposure columns are recorded as exposure-context stress support, not as a reconstructed all-sky selection function.

The declared evaluation returns 84,697 injection rows, 29,641 detected injection rows, and the following efficiency grid: center

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center The efficiency coefficient of variation is

S_{\rm inj}=0.05169329647427263.

The declared reason for the BOUNDED-NULLOVERTURN label is injection_efficiency_grid_stable.

The catalog exposure-context board is center

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center The catalog exposure summary records 600 rows with positive exposure and total exposure sum 47,923.4 in the staged exposure units of the input map and table. This lane is an exposure-context diagnostic only.

The replay result reproduces the declared BOUNDED-NULLOVERTURN label. The replay public-source basis is recorded in the cited public references and companion statements and is not part of the scientific claim beyond the declared gate label.

The replay-confirmed official-data evaluation is summarized by declared replay-result, source-configuration, replay-procedure, and public-source basis records retained in the cited public references and companion statements. These records do not strengthen the scientific label beyond .

The assigned VP1 label is

\boxed{\texttt{FRC-VP1-CHIME-EXPOSURE-INJECTION-STRESS-BOUNDED-NULLOVERTURN}}.

It means that the declared VP0 count/log-shell diagnostic survives this exposure-aware and injection-assisted public-data stress layer under the declared CHIME/FRB Catalog 1 window. It does not mean that the CHIME/FRB selection function is fully reconstructed.

center

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quote \ is classified as a declared CHIME/FRB exposure-aware and injection-assisted stress result. The declared evaluation gives \ on 600 catalog rows, 84,697 live-injected rows, 29,641 detected injection rows, and a stable injection-efficiency grid with coefficient of variation 0.0516933. The result is declared-window compatibility under visible CHIME/FRB injection and exposure controls only; it is not a full CHIME/FRB selection-function closure, luminosity-function inference, DM-to-redshift assignment, FRB population-law verification, or CHC propagation-correction detection. quote

Data and code availability..

This companion manuscript uses public CHIME/FRB data products and cited public references and companion statements as described in the text. Cited public references and companion statements, where provided, are identified by the companion source summaries cited in the text.

Funding and competing interests..

No external funding was received for this work. The author declares no competing interests.