Difference: Calibration (1 vs. 7)

Revision 72015-11-19 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"
Deleted:
<
<

Introduction

Description of the calibration process.

Focus the instrument

On an ipython console at NEMEA, write:

> import SpecFocus
> res = SpecFocus.focus_loop(stage_control, du_control, focus_pos = np.arange(3.0, 3.5, 0.05))
> SpecFocus.analyze(res)

Select the value with the maximum value in the figure for the focus.

Arcs

Ar

Exposure of 15s. Should get around 10k counts on the brightest spots.

Xe

Exposure of 15s.

Hg

Early arcs did not show great S/N with 15s. Just above the bias limit. At later time, 15s did provide the right number of counts. Exposure of 15s.

Cd

Wait 3 min to warm up. Exposure of 15s.

Dome flats

Power up the telescope if down. Select 'dome' in the control window. Click 'Calibration'. Once calibration is selected, the lamps open.

Select 'flat stow' and Telescope.

Focusing the telescope

  • Take a rainbow camera image.
  • Once we see it in the rc, select the arrow from the centroid of the object to the centre of the IFU pointing circle.
  • Repeat with exposures until the object is entered in the circle.
  • Press button 'To IFU', to move the object to the IFU.
  • Examine the IFU image.
  • Take focus loop. Predicted focus for GRB is 14.85. Finer step of 0.05 may be used.

STD star

  • Select the coordinates of the star in the list.
  • Identify the STD in the rainbow camera.
  • Offset the telescope to fit the STD in the circle of the IFU.
  • Click 'ToIFU'.
  • Select the parameters of the spectra: time

Exposure time suggestions for STD:

  • 10 - 11 mag --> 120s
  • 11 - 12 mag --> 260s
  • 12 - 13 mag --> 500s
  • 13 - 14 mag --> 600s

-- NadiaBlagorodnova - 17 Nov 2015

 \ No newline at end of file

Revision 62015-11-18 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.
Line: 58 to 58
 
  • 10 - 11 mag --> 120s
  • 11 - 12 mag --> 260s
  • 12 - 13 mag --> 500s
Added:
>
>
  • 13 - 14 mag --> 600s
  -- NadiaBlagorodnova - 17 Nov 2015 \ No newline at end of file

Revision 52015-11-18 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.
Line: 55 to 55
 
  • Select the parameters of the spectra: time

Exposure time suggestions for STD:

Changed:
<
<
  • 11 mag --> 120s
  • 12 mag --> 260s
  • 13 mag --> 500s
>
>
  • 10 - 11 mag --> 120s
  • 11 - 12 mag --> 260s
  • 12 - 13 mag --> 500s
  -- NadiaBlagorodnova - 17 Nov 2015 \ No newline at end of file

Revision 42015-11-17 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.

Revision 32015-11-17 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.
Line: 39 to 39
 

Focusing the telescope

Changed:
<
<
- Take a rainbow camera image. - Once we see it in the rc, select button 'To IFU', to move the object to the IFU. - Examine the IFU image. - Take focus loop. Predicted focus for GRB is 14.85. Finer step of 0.05 may be used.
>
>
* Take a rainbow camera image. * Once we see it in the rc, select the arrow from the centroid of the object to the centre of the IFU pointing circle. * Repeat with exposures until the object is entered in the circle. * Press button 'To IFU', to move the object to the IFU. * Examine the IFU image. * Take focus loop. Predicted focus for GRB is 14.85. Finer step of 0.05 may be used.
 

STD star

Changed:
<
<
- Select the coordinates of the star in the list. - Identify the STD in the rainbow camera. - Offset the telescope to fit the STD in the circle of the IFU. - Click 'ToIFU'. - Select the parameters of the spectra: time

- 11 mag --> 120s - 12 mag --> 260s

>
>
* Select the coordinates of the star in the list. * Identify the STD in the rainbow camera. * Offset the telescope to fit the STD in the circle of the IFU. * Click 'ToIFU'. * Select the parameters of the spectra: time

Exposure time suggestions for STD: * 11 mag --> 120s * 12 mag --> 260s * 13 mag --> 500s

  -- NadiaBlagorodnova - 17 Nov 2015 \ No newline at end of file

Revision 22015-11-17 - NadiaBlagorodnova

Line: 1 to 1
 
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.
Changed:
<
<

Focus

>
>

Focus the instrument

 On an ipython console at NEMEA, write:

> import SpecFocus

Line: 14 to 14
 

Arcs

Ar

Changed:
<
<
Take exposure of 15s.
>
>
Exposure of 15s. Should get around 10k counts on the brightest spots.
 

Xe

Added:
>
>
Exposure of 15s.

Hg

Early arcs did not show great S/N with 15s. Just above the bias limit. At later time, 15s did provide the right number of counts. Exposure of 15s.

Cd

Wait 3 min to warm up. Exposure of 15s.

Dome flats

Power up the telescope if down. Select 'dome' in the control window. Click 'Calibration'. Once calibration is selected, the lamps open.

Select 'flat stow' and Telescope.

Focusing the telescope

- Take a rainbow camera image. - Once we see it in the rc, select button 'To IFU', to move the object to the IFU. - Examine the IFU image. - Take focus loop. Predicted focus for GRB is 14.85. Finer step of 0.05 may be used.

STD star

- Select the coordinates of the star in the list. - Identify the STD in the rainbow camera. - Offset the telescope to fit the STD in the circle of the IFU. - Click 'ToIFU'. - Select the parameters of the spectra: time

- 11 mag --> 120s - 12 mag --> 260s

 

-- NadiaBlagorodnova - 17 Nov 2015 \ No newline at end of file

Revision 12015-11-17 - NadiaBlagorodnova

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="Software"

Introduction

Description of the calibration process.

Focus

On an ipython console at NEMEA, write:

> import SpecFocus
> res = SpecFocus.focus_loop(stage_control, du_control, focus_pos = np.arange(3.0, 3.5, 0.05))
> SpecFocus.analyze(res)

Select the value with the maximum value in the figure for the focus.

Arcs

Ar

Take exposure of 15s.

Xe

-- NadiaBlagorodnova - 17 Nov 2015

 
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