ASTROSAT CZTI

Data Quality Report

Orbit 57141

Creation date: 2026-04-21T00:37:46.702057
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/AS1A14_083T10_9000006566_57141cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57141cztM0_level2_quad_clean.evt
Size (bytes)2,303,870,400421,862,400
Size2.1 GB 402.3 MB
Events in quadrant A13,174,9512,844,960
Events in quadrant B16,285,8652,977,082
Events in quadrant C22,503,3662,526,950
Events in quadrant D31,003,8032,363,510

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0613533
B0695683
C0882763
D01131345

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06100
B06100
C06100
D06100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A299641990.664130%
B2996510523.510763%
C2996526818.947105%
D29964300310.022026%

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 31658 29964 19 19 0.06% 0.06%
B 31660 29965 573 573 1.81% 1.91%
C 31659 29968 2085 2085 6.59% 6.96%
D 31659 29965 2902 2902 9.17% 9.68%

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 3 14 301028 371.89 3259 3172 800.9
A 5 113 103903 125.77 3259 3172 800.9
A 10 251 43562 50.43 3259 3172 800.9
B 10 16 1940102 2895.75 3148 3025 668.9
B 5 172 412407 611.99 3148 3025 668.9
B 5 185 313785 464.56 3148 3025 668.9
C 12 252 5904997 7320.73 2976 2953 806.2
C 15 198 4279603 5304.64 2976 2953 806.2
C 14 254 225336 275.84 2976 2953 806.2
D 15 142 10792971 12718.96 3010 2872 848.3
D 12 33 3972936 4679.76 3010 2872 848.3
D 6 159 1478672 1739.62 3010 2872 848.3

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