Next: Creation of the Up: Typical Run Previous: Initialisation of the . The command CREATE/PSF creates a 1D image of a normalized gaussian centered in 0. Command: . NAMEP : output image . FWMM : full width at half maximum of the instrumental response (?) ... This image is to be used by the command COMPUTE/ABS ; any other (non gaussian) PSF can be used provided it is centered in 0, normalised and has the same step size as the synthetic image. ... Tue Mar 28 16:52:29 MET DST 1995 ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

create_gaq . ... Will create a GAQ record from the default values or will delete the GAQ . ... PURPOSE: Creates a default GAQ record for the specified obsets or . deletes all the GAQ records for the specified obsets or . ... format with one obset per record. ... create_record (proposal_id =None , obset_id =None , version_num =None , gaq_type =None ) . This function will create a new default GAQ record. delete_record (proposal_id =None , obset_id =None , version_num =None , gaq_type =None ) . ...

... Default . ... The descriptions below focus on the meaning of each filename parameter, leaving the exact details of the inferred default value to be explained in the algorithm section. evlist . ... file . The response matrix file (OGIP-compliant format). ... If a spectrum file is not provided ( withspectrum =no) this parameter specifies the INDEX number of a source in the source description list (parameter srclist ), and thereby the incidence angle and selection regions for the response matrix. ...

Astronomy Picture of the Day . W5: Pillars of Star Creation . ... JPL-Caltech , NASA Explanation: How do stars form? ... A likely reason for this is that the older stars in the center are actually triggering the formation of the younger edge stars. The triggered star formation occurs when hot outflowing gas compresses cooler gas into knots dense enough to gravitationally contract into stars. ... Publications with keywords: star formation . Publications with words: star formation . ...