Photometric package for ESO/MIDAS

1.- Introduction

This package allows the user to measure standard stars on CCD frames in an interactive way, then to compute a photometric solution. The residuals of this solution can be plotted, and bad stars edited out interactivelly.

The measurements interface finds and measures the stars automatically on the frames (works quite well, cf Fig.1). For this reason, most of the original routines (called TMAG_something.prg or TMAG/something in Midas) have been evolved to AMAG_something (for "Automatic" Tmag). While it might be confusing, AMAG is just an upgrade of TMAG.

For the interactive computation of the photometric solution, a Graphic User Interface is available, as seen in Fig.3.

TMAG has some additional commands to deal with the EFOSC2, EMMI-red, WFI and SuSI2 instruments at La Silla.

Figure 1: Screen shot of a frame on which the standards have been found and measured automatically

Figure 2: Screen shot of a residual plots. The points can be interactivelly edited out.

Figure 3: screen shot of the G.U.I., showing it ready to process table std.tbl for filter V, solving for the ZeroPoint, but using 0.125 as default for the extinction, and the system default for the color term.

2.- Download and installation

Get the latest version of the package (they are listed and linked at the bottom of this page), and expand it in the directory where you keep source code of packages (in my case, ~/source). The prg requires MIDAS version 97NOV or newer. Check the INSTALL file. On a recent MIDAS (under SciSoft) installation on Linux, it should be sufficient to do
  cd tmag/src
  make all install clean

Some support can be provided by Olivier Hainaut (ohainaut @, to whom bug reports and suggestions should also be sent.

3.- User's manual

3.1.- Introduction

The package works with the standard MIDAS command system, and uses its graphical capabilities. In the package, many commands appear in double, as amag_* and tmag_*. The amag ones correspond to the new, fairly user-friendly package, while tmag is an older version of the package, less user-friendly but more flexible. The manual below refers to the amag commands. The tmag commands are documented in the prg files.

Almost all commands come with a on-line help, which is accessible with @@ command ??? .

Section 3.2- is a step-by-step cookbook on how to use the program, while Section 3.3- is the detailed reference manual for all the commands.

3.2- Cookbook

3.3.- Command Reference Manual

3.3.1.- Standard Measurement Commands

3.3.2.- Photometric Solution Commands

3.3.3.- Object Measurement Commands

3.3.4.- Instrument-specific commands

These commands are primarilly designed to be used as a quick-look tool when observing with WFI, EFOSC2, SuSI2 and EMMI-red. Probably of not much use for anybody else.

Each of the following command exist for the 4 instruments. Just replace INST by EMMI, SUSI, WFI or EFOSC.



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