ASTROSAT CZTI

Data Quality Report

Orbit 20200702_A09_033T01_9000003750_level2

Creation date: 2025-12-13T05:40:13.528608
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/AS1A09_033T01_9000003750cztM0_level2.fits modeM0/AS1A09_033T01_9000003750cztM0_level2_quad_clean.evt
Size (bytes)768,479,040606,954,240
Size732.9 MB 578.8 MB
Events in quadrant A4,758,5063,462,901
Events in quadrant B4,575,9983,464,293
Events in quadrant C4,679,7103,266,130
Events in quadrant D4,113,7223,040,773

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015280
B015320
C015260
D015280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01567570
B01620880
C01599620
D01718640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01210
C01210
D01190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A750269731.296884%
B7503813031.736454%
C7506614531.935630%
D7503213971.861872%

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 88859 75196 0 0 0.00% 0.00%
B 88859 75206 0 0 0.00% 0.00%
C 88859 75224 0 0 0.00% 0.00%
D 88859 75179 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 3850 8.8 1240 1167 304.9
A 7 110 3720 8.37 1240 1167 304.9
A 9 19 3586 7.93 1240 1167 304.9
B 2 9 3625 10.32 1209 1152 239.6
B 2 8 3067 7.99 1209 1152 239.6
B 5 128 2976 7.61 1209 1152 239.6
C 1 81 3539 7.62 1236 1160 312.1
C 1 80 3537 7.62 1236 1160 312.1
C 12 241 3186 6.49 1236 1160 312.1
D 3 14 2980 6.15 1174 1071 310.5
D 10 189 2948 6.05 1174 1071 310.5
D 6 231 2876 5.81 1174 1071 310.5

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