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Continued Brightening of PKS B1035-281 in the Optical/Infrared Bands

ATel #8780; J. C. Isler (Vanderbilt), E. MacPherson, C. M. Urry, P. Coppi, C. Bailyn (Yale)
on 5 Mar 2016; 22:11 UT
Credential Certification: Jedidah Isler (jedidah.isler@vanderbilt.edu)

Subjects: Infra-Red, Optical, AGN, Blazar

As part of our ongoing SMARTS (optical/near-infrared) O/IR Blazar Monitoring program, we observe gamma-ray-bright blazars with the 1.3m+ANDICAM instrument in Cerro Tololo, Chile (CTIO). This instrument is a permanently-mounted, dual-channel imager providing simultaneous detections in the optical and near-infrared.

We have observed continued O/IR brightening in PKS B1035-281, first reported as an unusually hard spectrum, gamma-ray flaring event by Fermi Gamma-Ray Space Telescope/LAT on 26 Feb 2016 (ATel #8740). This source has subsequently undergone multiwavelength observations by a variety of telescopes (ATels #8747, #8767, #8773). Most recently, the 2.1m+CANICA NIR camera recorded a J-band magnitude of 15.616 +/- 0.02 on 01 March 2016. SMARTS has continued to monitor this source and we report several nights of data, including three observations on the night of UT 04 March 2016. We note Delta_J = 0.5 mag over the course of that night. The most recent data points obtained by SMARTS are listed below (Columns: UT_Date JD Mag Mag_error):

B
20160301 2457448.61499 18.24 0.013
20160302 2457449.67207 17.78 0.014
20160303 2457450.62806 17.69 0.008
20160304 2457451.61540 17.41 0.007
20160304 2457451.65944 17.34 0.006
20160304 2457451.71909 17.31 0.006

R
20160301 2457448.61768 17.18 0.013
20160302 2457449.67476 16.77 0.010
20160303 2457450.63075 16.61 0.008
20160304 2457451.61810 16.33 0.007
20160304 2457451.66213 16.26 0.007
20160304 2457451.72177 16.22 0.006

J
20160301 2457448.61598 15.61 0.040
20160302 2457449.67305 15.44 0.034
20160303 2457450.62853 15.18 0.024
20160304 2457451.61587 14.89 0.020
20160304 2457451.65991 14.63 0.018
20160304 2457451.71956 14.39 0.017

Given that this source has rapidly increased in brightness, we encourage continued multiwavelength monitoring. SMARTS will continue to monitor this source and the data are publicly available at the following locations:
Light Curve: http://www.astro.yale.edu/smarts/glast/plots/1035-281.jpg
Data Table: http://www.astro.yale.edu/smarts/glast/tables/1035-281.tab

SMARTS Optical/IR Observations of Fermi Blazars