INTEGRAL/WYFFOS

Documentation

The INTEGRAL manual is still under construction. Here you can find the manual original version.

Click here for the most recent version of the on-line SETUP and Observing Procedures.

Basic Information

Up to six scientific bundles can be simultaneously mounted in the Swing Plate (SP) ,located in the telescope focal plane area, although in the standard configuration only three are used (called sb1, sb2,and sb3). These bundles are 5.5 m long, while their fibre core diameter (in sky units) is: 0.45 (sb1), 0.9 (sb2), and 2.7 (sb3) arcsec respectively. The bundles are simultaneously connected at the entrance pseudo-slit of the wyffos spectrograph. They can be interchanged very easily, with an overhead of a few seconds.  Hence, depending on the prevailing seeing conditions the instrument can be easily optimized for the scientific program.

At the focal plane the fibres are arranged in two groups, one forming a rectangle, and the other a ring which is intended for collecting background light (for small-sized objects). Table 1 and Figure 1 show the main characteristics of each bundle.
 


 


 

Spectral Resolutions

For any particular grating the spectral resolution depends on the fibre bundle as a consequence of the different fibre sizes. Table 2 lists the mean spectral resolution and linear dispersions for different gratings and bundle (reflexion mode). Note that due to the variation of the Wyffos focus over the CCD (which affects the FWHM) the spectral resolution also changes over the CCD.


 
 

Calibration Information

Arc maps from INTEGRAL on the WHT.
 
 

Table 3: CuNe+CuAr lamps for STD1 of INTEGRAL with R1200B grating 
Spectral Range (A)
Linear Dispertion (A/pix)
3900-5395
1.46
4395-5888
1.46
5385-6840
1.43
5885-7340
1.42

Arcs with other bundles and same grating look like close similar. As example: STD2, STD3
 
 

Table 4: CuNe+CuAr lamps for STD2 of INTEGRAL with R600R grating 
Spectral Range (A)
Linear Dispertion (A/pix)
 3735-6785
 2.99
 4775-7825
2.98
 5700-8800
 
 7700-9700
  

Quick Look/Data Reductions

Your SA will provide you a basic training of the INTEGRAL package for a quick look of you data at the telescope.

Information on how to reduce your INTEGRAL data can be found here.

Last updated March 2000
Begoña García-Lorenzo (Instrument specialist)
bgarcia@ing.iac.es

Ana M. Pérez-García (Deputy)
aperez@ing.iac.es