# Assessment Instructions: Problem Set 04 — White Dwarfs, Supernovae, and Neutron Stars

## Inputs to Inspect
Student submission, this problem set, the solution key, the corresponding lecture slides/notes, and the referenced dataset(s) under `materials/ASTR230/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 reduction steps should not.

## Problem-Level Criteria
- Problem 1: 15 points — Correct percentage and correct remaining mass to the Chandrasekhar limit.
- Problem 2: 15 points — Correct volume, mass, and Chandrasekhar-limit comparison.
- Problem 3: 15 points — Correct application of I ∝ R² angular-momentum conservation with correct final units.
- Problem 4: 15 points — Correct, specific contrast of Type Ia and Type II progenitors, mechanisms, and remnants.

## 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
- Using R instead of R² in the angular-momentum/moment-of-inertia scaling.
- Describing Type Ia and Type II supernovae as differing only in brightness rather than in progenitor and mechanism.
- Forgetting to convert the spin period into seconds when requested.