1 Ocak 2022 Dergi makalesi Açık Erişim

Agarwal, Aditi; Mihov, B.; Andruchow, I; Cellone, Sergio A.; Anupama, G. C.; Agrawal, V; Zola, S.; Ozdonmez, Aykut; Ege, Ergun

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{
  "DOI": "10.1007/s12036-021-09793-5", 
  "abstract": "We study flux and spectral variability of the high energy peaked TeV blazar PG 1553 + 113 on diverse timescales using the data collected from 2005 to 2019 which also includes the intensive intra-night monitoring of the target. Additionally, we recorded the brightest flare of the blazar PG 1553 + 113 during April 2019 when the source attained an R-band magnitude of 13.2. Analyzing the spectral evolution of the source during the flare gave a clockwise spectral hysteresis loop and a time lag with V-band variations leading to the R-band ones. Various statistical tests, fitting procedures and cross-correlation techniques are applied to search for periodicity and examine the color-magnitude relationship. We find a median period of (2.21 +/- 0.04) years along with the secondary period of about 210 days. Finally, we briefly discuss various physical mechanisms which are capable of explaining our findings.", 
  "author": [
    {
      "family": "Agarwal", 
      "given": " Aditi"
    }, 
    {
      "family": "Mihov", 
      "given": " B."
    }, 
    {
      "family": "Andruchow", 
      "given": " I"
    }, 
    {
      "family": "Cellone", 
      "given": " Sergio A."
    }, 
    {
      "family": "Anupama", 
      "given": " G. C."
    }, 
    {
      "family": "Agrawal", 
      "given": " V"
    }, 
    {
      "family": "Zola", 
      "given": " S."
    }, 
    {
      "family": "Ozdonmez", 
      "given": " Aykut"
    }, 
    {
      "family": "Ege", 
      "given": " Ergun"
    }
  ], 
  "container_title": "JOURNAL OF ASTROPHYSICS AND ASTRONOMY", 
  "id": "256847", 
  "issue": "1", 
  "issued": {
    "date-parts": [
      [
        2022, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Optical flux and spectral characterization of the blazar PG 1553+113 based on the past 15 years of data", 
  "type": "article-journal", 
  "volume": "43"
}