dc.contributor.author |
Pandey, Ashwani |
|
dc.contributor.author |
Gupta, Alok C. |
|
dc.contributor.author |
Wiita, Paul J. |
|
dc.contributor.author |
Tiwari, S. N. |
|
dc.date.accessioned |
2023-03-29T11:14:39Z |
|
dc.date.available |
2023-03-29T11:14:39Z |
|
dc.date.issued |
2019-02 |
|
dc.identifier.uri |
https://doi.org/10.3847/1538-4357/aaf974 |
|
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/1365 |
|
dc.description.abstract |
We present the results of our optical (VRI) observations of the TeV blazar PG 1553+113 over eight nights in 2016
April. We monitored the blazar quasi-simultaneously in V and R bands each night and examined the light curves
(LCs) for intraday flux and color variations using two of the most powerful tests: the power-enhanced F-test and
the nested ANOVA test. The source was found to be significantly (>99%) variable in both V and R bands only on
April 13, while clear variations only in R band LCs were seen on April 8 and 12. No temporal variation was seen in
the color during the observation period. We did not find any significant correlation between V − R color index and
R magnitude on any observing night. We found a mean optical spectral index of ∼0.83 ± 0.02 with a maximum
variation of 0.21 by fitting a power law (Fν ∝ ν− α
) in the optical (VRI) spectral energy distribution of PG 1553
+113. We briefly discuss the possible physical processes responsible for the observed flux and spectral variability. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
The Astrophysical Journal |
en_US |
dc.relation.ispartofseries |
1469;apj871-192 |
|
dc.subject |
BL Lacertae objects: general |
en_US |
dc.subject |
– BL Lacertae objects: individual (PG 1553+113) |
en_US |
dc.subject |
– galaxies: active |
en_US |
dc.title |
Optical Flux and Spectral Variability of the TeV Blazar PG 1553+113 |
en_US |
dc.type |
Article |
en_US |