ASTROSAT CZTI

Data Quality Report

Orbit 56755

Creation date: 2026-03-25T22:32:16.004317
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_083T05_9000006560_56755cztM0_level2.fits modeM0/AS1A14_083T05_9000006560_56755cztM0_level2_quad_clean.evt
Size (bytes)475,822,08088,476,480
Size453.8 MB 84.4 MB
Events in quadrant A3,612,022596,675
Events in quadrant B4,953,862613,598
Events in quadrant C3,793,962550,325
Events in quadrant D4,767,602482,702

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150031
B0191241
C0157901
D0187093

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62471652.641268%
B62475699.108372%
C62483295.265685%
D624776312.213863%

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 7317 6248 76 76 1.04% 1.22%
B 7317 6248 238 238 3.25% 3.81%
C 7318 6249 207 207 2.83% 3.31%
D 7317 6248 729 729 9.96% 11.67%

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 547344 3328.19 667 650 164.3
A 10 251 351913 2138.44 667 650 164.3
A 3 62 100474 607.71 667 650 164.3
B 4 206 1376178 9839.77 647 624 139.8
B 5 185 607356 4340.14 647 624 139.8
B 8 128 243497 1737.35 647 624 139.8
C 9 38 204171 1179.05 631 624 172.6
C 12 252 168100 970.11 631 624 172.6
C 15 199 148463 856.36 631 624 172.6
D 2 249 2040166 11634.6 612 584 175.3
D 8 160 73145 413.92 612 584 175.3
D 5 173 50971 287.43 612 584 175.3

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