ASTROSAT CZTI

Data Quality Report

Orbit 20161008_A02_081T01_9000000720_level2

Creation date: 2025-11-06T22:44:01.916018
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A02_081T01_9000000720cztM0_level2.fits modeM0/AS1A02_081T01_9000000720cztM0_level2_quad_clean.evt
Size (bytes)701,472,960745,770,240
Size669.0 MB 711.2 MB
Events in quadrant A4,258,5764,626,998
Events in quadrant B4,070,4744,600,106
Events in quadrant C4,139,7964,306,449
Events in quadrant D3,506,3663,785,643

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015640
B015640
C015620
D015620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01585610
B01725240
C01605240
D01816800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A768227841.020541%
B7682513031.696062%
C768158551.113064%
D7682829303.813714%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 88481 76834 0 0 0.00% 0.00%
B 88481 76824 0 0 0.00% 0.00%
C 88481 76836 0 0 0.00% 0.00%
D 88481 76754 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 188 4341 11.73 1103 1031 282.2
A 0 29 4192 11.2 1103 1031 282.2
A 7 110 3832 9.93 1103 1031 282.2
B 2 9 3604 12.0 1073 1021 215.2
B 14 254 2890 8.68 1073 1021 215.2
B 12 226 2831 8.41 1073 1021 215.2
C 1 80 3104 7.2 1092 1008 291.2
C 1 81 3078 7.11 1092 1008 291.2
C 12 241 2925 6.58 1092 1008 291.2
D 11 82 2783 6.91 1002 906 271.6
D 6 231 2552 6.06 1002 906 271.6
D 4 160 2550 6.05 1002 906 271.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter