# Assessment Instructions: Problem Set 03 — CCD Noise Terms and Exposure-Time Trade-offs

## Inputs to Inspect
Student submission, this problem set, the solution key, the corresponding lecture slides/notes, and the referenced dataset(s) under `materials/ASTR340/data/`.

## Grading Standard
Award credit for correct method and units first, then for the specific numeric result. A student who shows correct reasoning with a small arithmetic slip should receive most of the available credit; a student with a correct-looking number but no visible derivation steps should not. Because this is a 300-level quantitative instrumentation course, full marks require a genuine derivation (not just formula substitution) wherever the problem set asks for one.

## Problem-Level Criteria
- Problem 1: 20 points.
- Problem 2: 15 points — correct three-way comparison.
- Problem 3: 15 points — correct crossover solution.
- Problem 4: 20 points — correct regime interpretation and efficiency argument.

## Resubmission Policy
Students may resubmit within one week of receiving feedback. A resubmission must show a corrected derivation, not only a corrected final number, and should reference the specific feedback comment it addresses. Regrade to a maximum of 90% of the original point value unless the error was a grading mistake.

## Common Errors to Flag
- Confusing the √(rate×t) shot-noise scaling with a linear-in-t scaling.
- Ignoring dark-current noise in the three-way comparison even though it is correctly negligible (must still be shown, not silently dropped).