Photometric Monitoring of the Recurrent Nova T Coronae Borealis
ATel #16337; A. W. Shafter (SDSU), I. Yousuf, A. Luo (Westview HS)
on 16 Nov 2023; 03:33 UT
Credential Certification: Allen W. Shafter (ashafter@sdsu.edu)
Subjects: Optical, Nova, Transient
Referred to by ATel #: 16781
The bright Recurrent Nova T CrB with a recurrence time of ~80 yr is due to erupt in the next few years. In anticipation of the impending eruption, T CrB has been the subject of increased observational interest in recent months (e.g., ATels #16336, #16214, #16213, #16120, #16109, #16107). Here we report a series of B, V, and R band photometry of T CrB obtained with the Mount Laguna Observatory 40-in telescope before the star became unobservable due to its increasing proximity to the sun.
2023 UT Date | Filter | Mag
Aug 30.163 B 11.54
30.152 V 10.06
30.143 R 8.70
Aug 31.195 B 11.51
31.184 V 10.06
31.175 R 8.70
Sep 04.162 B 11.53
04.149 V 10.07
04.141 R 8.68
Sep 07.151 B 11.54
07.139 V 10.05
07.132 R 8.70
Sep 09.168 B 11.49
09.157 V 10.02
09.151 R 8.68
Sep 13.155 B 11.49
13.147 V 10.00
13.142 R 8.63
Sep 14.143 B 11.44
14.133 V 9.98
14.127 R 8.64
Sep 16.144 B 11.41
16.136 V 9.96
16.131 R 8.62
Sep 18.161 B 11.44
18.153 V 9.95
18.149 R 8.61
Sep 19.128 B 11.39
19.120 V 9.93
19.115 R 8.59
Sep 21.128 B 11.44
21.121 V 9.94
21.115 R 8.59
Sep 24.123 B 11.42
24.114 V 9.94
24.110 R 8.60
Sep 25.120 B 11.43
25.112 V 9.95
25.128 R 8.62
Sep 26.128 B 11.42
26.119 V 9.96
26.110 R 8.63
Sep 27.124 B 11.45
27.116 V 9.97
27.110 R 8.66
Sep 28.122 B 11.43
28.114 V 9.96
28.109 R 8.65
Sep 29.117 B 11.45
29.109 V 9.98
29.105 R 8.64
All measurements were calibrated using a nearby comparison star (B = 14.75, V = 13.71, R = 13.00)
located at R.A. = 15h 59m 41.3s, Decl. = +25deg 53' 35" (J2000), which is 152" E and 98" S of the position of T CrB. We estimate the uncertainty in our photometry to be +/- 0.05 mag.
