Page History

...

Contents:
17 Feb 2011 - ACIS peaks and sigmas
24 Mar 2011 - ACIS line fluxes
04 May 2011 - XIS peaks versus COR
04 May 2011 - IACHEC plots: ACIS & XIS peaks, FWHMs & line fluxes
21 Jun 2011 - Is line centroid a good proxy for CTI?
17 Oct 2011 - Figures for paper?
31 Oct 2011 - Trailing charge
31 Oct 2011 - Figures for paper
21 Nov 2011 - OLD Schematic figures for paper
02 Dec 2011 - CTI change at -120C and -90C on ACIS
20 Dec 2011 - Schematic figures for paper
02 Feb 2012 - XIS Perseus analysis for non-CTI changes
09 Feb 2012 - XIS Perseus analysis for non-CTI changes, part II
05 Sep 2012 - ACIS fits with Gehrels weighting
05 Sep 2012 - cal source plots
14 Sep 2012 - XIS fits with Gehrels weighting
14 Sep 2012 - XIS background trend from night Earth data
24 Sep 2012 - new cal source plots
25 Sep 2012 - perseus intercepts
31 Oct 2012 - XIS BG trend from night Earth data, updated
31 Oct 2012 - XIS + ACIS background spectra with lines ID'd
17 Jan 2014 - XIS + ACIS calibration source spectra overplotted
17 Jan 2014 - XIS + ACIS background spectra with lines ID'd, version 2
13 Mar 2014 - new cal source plots

SPENVIS work has its own page: spenvis

...

Anchor
anchor1 anchor1

17 Feb 2011 - Catherine's attempt to duplicate Bev's monthly XIS plots for ACIS I3 ( Anchoranchor1anchor117 Feb 2011 - Catherine's attempt to duplicate Bev's monthly XIS plots for ACIS I3 (FI) and S3 (BI). Each data point is a fit to 0.1 years worth of cold ACIS calibration source data, filtered to include only the upper corner regions like XIS and grades G02346. After some testing as to which fitting procedures were less sensitive to background variations (important for ACIS probably not as much for XIS), and robust against low signal-to-noise data, I chose to use a Gaussian plus a linear background component (mpfitfun.pro with some limits to prevent non-physical fits).

...

ps of plots. individual eps files available on request.

...

Anchor
anchor20 anchor20

Oct 31, 2012 - Eric

Trend of the XIS NXB from night Earth data, extracting all but the cal source regions and bad regions of each chip, using all COR2 data with normal SCI on (XIS1 at 2 keV level). See previous post.

Here it is in 4 week bins, with the XIS1 y errorbars corresponding to the counting statistics. First using FTOOL lcurve:

Image Added

Second doing this by hand in xselect by and-ing a 4 week time range with the GTIs:

Image Added

I don't understand the scatter; each bin contains about 50 ksec of data, 1000's of counts, and should span a similar distribution of COR2, yet there is an intrinsic ~ 25% scatter, far higher than the < 5% quoted by Tawa. Restricting COR2>=10 does not change this, nor do larger time bins. Perhaps something is wrong with the GTIs and thus the effective exposure time calculation.

...

Anchor
anchor21 anchor21

Oct 31, 2012 - Eric

Background spectra for XIS and ACIS with lines ID's a lo Tawa:

Image Added

Also the EPS for the paper.

...

Anchor
anchor22 anchor22

Jan 17, 2014 - Bev

Calibration source spectra for XIS and ACIS:

Image Added

Also the EPS for the paper.

...

Anchor
anchor23 anchor23

Jan 17, 2014 - Eric

Background spectra for XIS and ACIS with lines ID's a la Tawa,
now with "FI CCD" and "BI CCD" identified.

Image Added

Also the EPS for the paper.

...

Anchor
anchor24 anchor24

Mar 12, 2014 - Bev

Calibration source spectra for XIS and ACIS:

Image Added

Also the EPS for the paperps of plots. individual eps files available on request.

...

Attachments

...