ASTROSAT CZTI

Data Quality Report

Orbit 57671

Creation date: 2026-05-26T14:06:59.960762
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_125T09_9000006578_57671cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57671cztM0_level2_quad_clean.evt
Size (bytes)446,313,60087,088,320
Size425.6 MB 83.1 MB
Events in quadrant A2,803,190586,278
Events in quadrant B5,771,249566,754
Events in quadrant C4,113,019552,705
Events in quadrant D3,374,635518,835

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124281
B0211221
C0162953
D0141111

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5902601.016605%
B590298616.706201%
C59012464.168785%
D59021742.948153%

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 6972 5902 3 3 0.04% 0.05%
B 6972 5902 233 233 3.34% 3.95%
C 6971 5902 147 147 2.11% 2.49%
D 6972 5902 138 138 1.98% 2.34%

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 4 95 151107 945.9 651 634 159.1
A 11 31 65208 405.92 651 634 159.1
A 7 223 42961 266.07 651 634 159.1
B 4 80 3076318 23289.32 623 599 132.1
B 5 185 90517 680.86 623 599 132.1
B 10 247 39568 295.07 623 599 132.1
C 15 224 1128775 6629.79 629 622 170.2
C 12 252 193425 1133.04 629 622 170.2
C 12 254 188717 1105.37 629 622 170.2
D 8 240 558076 3109.07 631 601 179.3
D 2 120 108460 601.53 631 601 179.3
D 15 201 50894 280.48 631 601 179.3

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