SAGE-Var Variable Catalog Descriptions
Overview
SAGE-Var is a follow-up to the SAGE and SAGE-SMC Legacy programs. The SAGE-Var program obtained 4 epochs of photometry at 3.6 and 4.5 microns covering the bar of the Large Magellanic Cloud (LMC) and the central region of the Small Magellanic Cloud (SMC) in order to probe the variability of extremely red sources missed by variability surveys conducted at shorter wavelengths, and to provide additional epochs of observation for known variables. The 6 total epochs of observations probe infrared variability on 15 different timescales ranging from 20 days to 5 years.
If you use these catalogs, please cite Riebel et al. (2015).
| Name | Intype | Units | Description |
|---|---|---|---|
| desig | char | none | Source IRAC Designation |
| ra | real | deg | Right Ascension, J2000 |
| dec | real | deg | Declination, J2000 |
| e1_36 | real | Jy | Epoch 1 flux in [3.6] band |
| e1_36_u | real | Jy | Uncertainty in Epoch 1 [3.6] flux |
| e2_36 | real | Jy | Epoch 2 flux in [3.6] band |
| e2_36_u | real | Jy | Uncertainty in Epoch 2 [3.6] flux |
| e3_36 | real | Jy | Epoch 3 flux in [3.6] band |
| e3_36_u | real | Jy | Uncertainty in Epoch 3 [3.6] flux |
| e4_36 | real | Jy | Epoch 4 flux in [3.6] band |
| e4_36_u | real | Jy | Uncertainty in Epoch 4 [3.6] flux |
| e5_36 | real | Jy | Epoch 5 flux in [3.6] band |
| e5_36_u | real | Jy | Uncertainty in Epoch 5 [3.6] flux |
| e6_36 | real | Jy | Epoch 6 flux in [3.6] band |
| e6_36_u | real | Jy | Uncertainty in Epoch 6 [3.6] flux |
| e1_45 | real | Jy | Epoch 1 flux in [4.5] band |
| e1_45_u | real | Jy | Uncertainty in Epoch 1 [4.5] flux |
| e2_45 | real | Jy | Epoch 2 flux in [4.5] band |
| e2_45_u | real | Jy | Uncertainty in Epoch 2 [4.5] flux |
| e3_45 | real | Jy | Epoch 3 flux in [4.5] band |
| e3_45_u | real | Jy | Uncertainty in Epoch 3 [4.5] flux |
| e4_45 | real | Jy | Epoch 4 flux in [4.5] band |
| e4_45_u | real | Jy | Uncertainty in Epoch 4 [4.5] flux |
| e5_45 | real | Jy | Epoch 5 flux in [4.5] band |
| e5_45_u | real | Jy | Uncertainty in Epoch 5 [4.5] flux |
| e6_45 | real | Jy | Epoch 6 flux in [4.5] band |
| e6_45_u | real | Jy | Uncertainty in Epoch 6 [4.5] flux |
| mean_36 | real | Jy | Mean [3.6] flux |
| mean_36_u | real | Jy | RMS Uncertainty in mean [3.6] flux |
| mean_45 | real | Jy | Mean [4.5] flux |
| mean_45_u | real | Jy | RMS Uncertainty in mean [4.5] flux |
| var_36_1 | real | none | Variability index at [3.6] for interval 1 Variability index is defined as the number of standard deviations by which two epochs differ in brightness. Table 5 of Riebel et al. (2015) defines the intervals. |
| var_36_2 | real | none | Variability index at [3.6] for interval 2 |
| var_36_3 | real | none | Variability index at [3.6] for interval 3 |
| var_36_4 | real | none | Variability index at [3.6] for interval 4 |
| var_36_5 | real | none | Variability index at [3.6] for interval 5 |
| var_36_6 | real | none | Variability index at [3.6] for interval 6 |
| var_36_7 | real | none | Variability index at [3.6] for interval 7 |
| var_36_8 | real | none | Variability index at [3.6] for interval 8 |
| var_36_9 | real | none | Variability index at [3.6] for interval 9 |
| var_36_10 | real | none | Variability index at [3.6] for interval 10 |
| var_36_11 | real | none | Variability index at [3.6] for interval 11 |
| var_36_12 | real | none | Variability index at [3.6] for interval 12 |
| var_36_13 | real | none | Variability index at [3.6] for interval 13 |
| var_36_14 | real | none | Variability index at [3.6] for interval 14 |
| var_36_15 | real | none | Variability index at [3.6] for interval 15 |
| var_45_1 | real | none | Variability index at [4.5] for interval 1 |
| var_45_2 | real | none | Variability index at [4.5] for interval 2 |
| var_45_3 | real | none | Variability index at [4.5] for interval 3 |
| var_45_4 | real | none | Variability index at [4.5] for interval 4 |
| var_45_5 | real | none | Variability index at [4.5] for interval 5 |
| var_45_6 | real | none | Variability index at [4.5] for interval 6 |
| var_45_7 | real | none | Variability index at [4.5] for interval 7 |
| var_45_8 | real | none | Variability index at [4.5] for interval 8 |
| var_45_9 | real | none | Variability index at [4.5] for interval 9 |
| var_45_10 | real | none | Variability index at [4.5] for interval 10 |
| var_45_11 | real | none | Variability index at [4.5] for interval 11 |
| var_45_12 | real | none | Variability index at [4.5] for interval 12 |
| var_45_13 | real | none | Variability index at [4.5] for interval 13 |
| var_45_14 | real | none | Variability index at [4.5] for interval 14 |
| var_45_15 | real | none | Variability index at [4.5] for interval 15 |
| ogle_id | char | none | ID From the OGLE-III Catalog of Variable Stars |
| ogle_class | char | none | Classification from the OGLE-III CVS |
| ogle_per | real | days | Variability period from the OGLE-III CVS |
| macho_id | char | none | ID from the MACHO survey |
| macho_per | real | days | Variability period from the MACHO survey |
| grams_class | char | none | Classification of best fitting GRAMS model (C or O) |
| yso_class | char | none | `Y' if a source is classified as a YSO candidate |
| amp_36 | real | none | SAGE-Var observed [3.6] Amplitude |
| amp_45 | real | none | SAGE-Var observed [4.5] Amplitude |