Micro-variability is defined as extremely rapid (t < 1 hour), low amplitude (amp < .1 mag) variations that are intermittently seen in radio loud quasars and BL lac objects. Several studies have recently been completed in an attempt to define duty cycles and characteristics of micro-variations in these types of source, including studies by the authors, and these observations have not only demonstrated the reality of these micro-variations, but also are starting to yield some insight into their characteristics. The following light curve shows microvariations obtained two observatories on the same evening, with two different telescopes, different instruments and different weather conditions. The reality of microvariations is established with these observations. However, we cannot rule out microvariations induced by intervening matter between the source S1 0716+71 and the Earth. Most likely, however, the variations are intrinsic to the source.
Name | Redshift | Object Type | Right Ascension | Declination | # micro Obs. |
---|---|---|---|---|---|
AO 0235+164 | 0.94 | BL Lac | 2h 38m | +16d 37m | 9 |
0420-01 | 0.915 | OVV | 4h 21m | -01d 20m | 9 |
S1 0716+71 | 0.30 | BL Lac | 7h 21m | +71d 20m | 17 |
0735+17 | 0.424 | BL Lac | 7h 35m | +17d42m | 1 |
0736+017 | 0.191 | OVV | 7h 36m | +1d 50m | 3 |
OJ 287 | 0.306 | BL Lac | 8h 51m | +20d 06m | 13 |
PKS 1156+295 | 0.729 | OVV | 11h 59m | +29d 14m | 2 |
3C 273 | 0.1575 | QSO | 12h 29m | +02d 08m | 1 |
3C 279 | 0.536 | OVV | 12h 56m | -05d 47m | 8 |
ON 231 | 0.102 | OVV | 14h 35m | +16d 30m | 2 |
3C 345 | 0.59 | OVV | 16h 42m | +39d 48m | 5 |
1510-089 | 0.36 | OVV | 15h 12m | -09d 59m | 2 |
BL Lac | 0.069 | BL Lac | 22h 02m | +42d 16m | 21 |
3C 446 | 1.404 | OVV | 22h 35m | +16d 30m | 4 |