The COS-B Archive![]() The COS-B archive includes High level products, such as images in different energy bands, in FITS format and accompanying GIF view, and the raw data in FITS format.
The COS-B data can be obtained using the databases COSBMAPS, for the high level products, COSBRAW , for the raw data, or directly from the COSB FTP area in the HEASARC archive. The COS-B databases can be accessed via Browse .
The COS-B data products were created using the program FADMAP (see Software). Each of the FITS maps are 120 x 120 pixels with 0.5 degrees per pixel. Header keywords record the parameter values used in fadmap (see below) to create the maps. The FITS images may be displayed using any standard package which accepts FITS images.
Each event file contains three extensions: good time interval (EXTNAME = 'ALLGTI'), event (EXTNAME = 'EVENTS'), and housekeeping (EXTNAME = 'TSI'). The ALLGTI and TSI extensions contain the information stored in the `OURLI` and `OBSLI` datasets. The EVENTS extension contains data from the `GAMLI` dataset. There are, in total, 65 files, one for each `OBSLI` observation. Photon positions (RA and DEC) were converted to pixels within a 512 X 512 pixel pseudo-image array. Each pixel is 0.1 degrees so the image is 51.2 X 51.2 degrees. The program fadmap can be used on the raw data files to generate maps with different parameter setups or different time selections from those used for the high level products. Page authors: Lorella Angelini Jesse Allen HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Friday, 25-Sep-2020 16:50:05 EDT |