Welcome to my Web-page

• Michelle-Ann Mckenzie

  email--mm852@columbia.edu or
  mckenzie@stacee.phys.columbia.edu

• Barnard College

  Columbia University
  3009 Broadway
  New York, NY 10027-6598
  

• Physics Department

  Physics & Astronomy

Here is a summary of my 1999-summer research experience. Software I worked on included:

• FORTRAN,
• PGPLOT,
• TeTEX.

These softwares enabled me to perform the following task, which are graphs of data collected from various sources.

• Redshift distribution & Variability for FSRQ and BL Lac.
• Spectral Index vs. Redshift for FSRQ and BL Lac.
• Luminosity vs. Redshift for FSRQ and BL Lac.
• Luminosity vs. Redshift for BL Lac.
• Flux vs. Variability Index for FSRQ and BL Lac.
• Spectral Index vs. Flux for FSRQ and BL Lac.
• Spectral Index vs. Flux for BL lac.
• Spectral Index vs. Flux for FSRQ.

Programs associated with the above graphs:

• Redshift distribution & Variability for FSRQ and BL Lac.
• Spectral Index vs. Redshift for FSRQ and BL Lac.
• Luminosity vs. Redshift for FSRQ and BL Lac.
• Luminosity vs. Redshift for BL LAC.
• Flux vs. Variability Index for FSRQ and BL Lac.
• Spectral Index vs. Flux for FSRQ and BL Lac.
• Spectral Index vs. Flux for BL Lac.
• Spectral Index vs. Flux for FSRQ

PGPLOT EXAMPLE WITH COLOR INDEX

HERE IS A FORTRAN CODE, WITHOUT USING COLOR, REQUIRED TO MAKE THE ABOVE GRAPH--FORTRAN CODE

THE ABOVE IS AN EXAMPLE OF A GRAPH USING PGPLOT COLOR INDEX. PGSCI.THE ONLY CHANGES MADE TO THE PREVIOUS FORTRAN CODE: GRAPHICS DEVICE--vps HAS CHANGED TO vcps TO ADD COLOR TO THE GRAPH. pgsci WAS CALLED BEFORE pgpt.

IER = PGBEG(0,'pgplot.ps/vcps',1,1) . . .

TO SELECT A NEW COLOR INDEX FOR SUBSEQUENT PLOTTING, USE ROUTINE PGSCI--THIS ATTRIBUTE AFFECTS ALL THE PRIMITIVES: LINES, GRAPH-MARKERS, TEXT, AND AREA-FILL. (SET COLOR INDEX), E.G..

CALL PGSCI (4)
CALL PGLINE (100, XP, YP)
CALL PGSCI (2)
CALL PGPT (57, XP, YP, 6)

THE ABOVE EXAMPLE IS ALMOST THE SAME AS THE PREVIOUS GRAPH. THIS GRAPH SHOWS THE IMPORTANTS OF THE PLACEMENT OF pgsci. YOU HAVE TO SPECIFYING WHERE EXACTLY YOU WANT COLOR AND PLACE pgsci BEFORE pgpt,pglineETC. NOT SPECIFYING CAN CAUSE THE BORDER OF THE GRAPH, ERROR BARS, POINTS, LEGENDS, ETC. TO HAVE THE SAME COLOR.