| CXO | Chandra X-ray Observatory |
| CXC | Chandra X-ray Observatory Center |
| CCD | Charge-Coupled Device |
| HRC | High Resolution Camera |
| ACIS | Advanced CCD Imaging Spectrometer |
| EM | Electro-Magnetic |
| LETG | Low Energy Transmission Grating |
| HETG | High Energy Transmission Grating |
| E/DE | Energy divided by Change in Energy |
| K | Kelvin |
| K-band | 2 micron band of infrared spectrum |
| IR | Infrared |
| APO | Apache Point Observatory |
| SIMBAD | Set of Identifications, Measurements and Bibliograpies for Astronomical Data |
| IDL | Interactive Data Language |
| RA | Right Ascension |
| DEC | Declination |
| BN | Becklin-Neugebauer |
| HST | Hubble Space Telescope |
| NICMOS | Near Infrared Camera and Multiobject Spectrometer |
| SNR | Signal to Noise Ratio |