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Table 3:

Photometry of SN 2007bg.

UT date 		JD Epocha Rest-frame B KBBb V KVVb R KRRb I KIIb Sourcec
  -2 450 000 (d) epoch (d)a                  

06/04/07 		4196.7 -10.0 -9.6         (18.20)d       R-IIIbe
16/04/07 4206.7 0.0 0.0         17.7 -.05     R-IIIbe
16/04/07 4207.3 0.7 0.6         17.7 -.05     R-IIIde
18/04/07 4208.7 2.0 1.9         17.8 -.05     R-IIIbe
23/04/07 4214.1 7.4 7.2 19.93 $\pm$ .09 -.18 18.98 $\pm$ .04 -.14 18.38 $\pm$ .05 -.06 18.16 $\pm$ .11 -.01 LT
27/04/07 4218.4 11.7 11.3 20.38 $\pm$ .17 -.18 19.35 $\pm$ .13 -.15 18.95 $\pm$ .09 -.07 18.67 $\pm$ .10 -.01 FTN
28/04/07 4218.9 12.2 11.9 20.48 $\pm$ .16 -.18 19.52 $\pm$ .07 -.15 18.95 $\pm$ .12 -.07 18.69 $\pm$ .07 -.01 LT
02/05/07 4223.3 16.7 16.1 21.03 $\pm$ .41 -.19 19.93 $\pm$ .11 -.16 19.35 $\pm$ .12 -.08 19.02 $\pm$ .09 -.01 FTN
05/05/07 4225.9 19.3 18.6 21.07 $\pm$ .10 -.19 20.09 $\pm$ .09 -.15 19.38 $\pm$ .07 -.08 19.25 $\pm$ .05 -.01 LT
11/05/07 4232.6 25.4 24.5 21.24 $\pm$ .09 -.22 20.36 $\pm$ .11 -.12 19.69 $\pm$ .08 -.08     TNG
13/05/07 4234.0 27.4 26.4 21.27 $\pm$ .09 -.22 20.47 $\pm$ .08 -.12 19.72 $\pm$ .06 -.08 19.66 $\pm$ .12 -.01 LT
19/05/07 4240.0 33.3 32.2 21.39 $\pm$ .11 -.21 20.54 $\pm$ .06 -.11 20.02 $\pm$ .07 -.08     LT
05/06/07 4257.0 50.3 48.6 21.46 $\pm$ .06 -.18 20.61 $\pm$ .20 -.09         LT
13/06/07 4265.0 58.3 56.4 21.55 $\pm$ .09 -.17 20.67 $\pm$ .08 -.07 20.32 $\pm$ .10 -.12 20.02 $\pm$ .19 .00 LT
07/07/07 4289.0 82.3 79.6 21.67 $\pm$ .07 -.13 20.93 $\pm$ .08 -.02 20.74 $\pm$ .08 -.15 20.47 $\pm$ .14 .00 LT
12/08/07 4324.9 117.4 113.4 22.12 $\pm$ .08 -.07 21.61 $\pm$ .09 .05 21.32 $\pm$ .13 -.20 20.95 $\pm$ .13 .00 WHT

Notes. Errors on all magnitudes have been determined by taking into account the uncertainty of PSF fitting of the SN, the uncertainty of having accurately removed the background contamination measured via artificial-star experiments and the uncertainty of both calculating the colour-terms and zero-points of each night's imaging via the measurement of a local standard stars in the field of the SN.
(a) Relative to the date of discovery (CBET 927).
(b) K-corrections determined for all epochs with spectral information and extrapolated to all other epochs (decimals).
(c) R-IIIb = 0.45 m ROTSE-IIIb, McDonald Observatory, Texas (USA). R-IIId = 0.45 m ROTSE-IIId, Turkish National Observatory, Bakirlitepe (Turkey). LT = RATCam on the 2.0 m Liverpool Telescope, Observatorio del Roque de Los Muchachos, La Palma (Spain). FTN = HawkCam on the 2.0 m Faulkes Telescope North, Haleakala Observatory, Hawaii (USA). TNG = DOLoRes on the 3.58 m Telescopio Nazionale Galileo, Observatorio del Roque de Los Muchachos, La Palma (Spain). WHT = auxiliary port camera on the 4.2 m William Herschel Telescope, Observatorio del Roque de Los Muchachos, La Palma (Spain).
(d) Upper magnitude limit taken from CBET 927.
(e) Magnitude taken from CBET 927.


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