ASTROSAT CZTI

Data Quality Report

Orbit 20161001_T01_138T01_9000000698_level2

Creation date: 2025-11-06T18:58:45.058038
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/AS1T01_138T01_9000000698cztM0_level2.fits modeM0/AS1T01_138T01_9000000698cztM0_level2_quad_clean.evt
Size (bytes)706,544,640719,072,640
Size673.8 MB 685.8 MB
Events in quadrant A4,226,1604,258,491
Events in quadrant B4,076,0664,245,183
Events in quadrant C4,177,3084,186,565
Events in quadrant D3,504,3303,675,140

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016060
B016060
C016060
D016060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01683210
B01796820
C01623990
D01980860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7893812611.597456%
B7894313881.758231%
C789366230.789247%
D7894132974.176537%

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 90478 78938 0 0 0.00% 0.00%
B 90478 78942 0 0 0.00% 0.00%
C 90478 78942 0 0 0.00% 0.00%
D 90478 78924 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 0 29 4229 11.39 1095 1020 281.6
A 14 188 4162 11.16 1095 1020 281.6
A 7 110 3730 9.62 1095 1020 281.6
B 2 9 3606 11.9 1076 1021 217.2
B 12 226 2937 8.82 1076 1021 217.2
B 14 254 2904 8.67 1076 1021 217.2
C 1 80 3192 7.37 1102 1018 295.1
C 1 81 3050 6.89 1102 1018 295.1
C 12 241 2879 6.31 1102 1018 295.1
D 11 82 2775 7.12 998 905 262.7
D 3 14 2618 6.52 998 905 262.7
D 1 19 2590 6.41 998 905 262.7

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