ASTROSAT CZTI

Data Quality Report

Orbit 59021

Creation date: 2026-08-25T09:42:06.591741
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_004T02_9000006600_59021cztM0_level2.fits modeM0/AS1A14_004T02_9000006600_59021cztM0_level2_quad_clean.evt
Size (bytes)952,862,40062,951,040
Size908.7 MB 60.0 MB
Events in quadrant A3,025,747619,465
Events in quadrant B10,330,571350,896
Events in quadrant C15,001,70618,301
Events in quadrant D6,439,815489,702

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0132741
B0349021
C0484221
D0233971

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6122831.355766%
B6123328553.650171%
C6123598997.811530%
D612393515.270292%

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 7292 6122 13 13 0.18% 0.21%
B 7292 6122 2741 2741 37.59% 44.77%
C 7292 6122 5904 5904 80.97% 96.44%
D 7293 6123 889 889 12.19% 14.52%

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 24 225776 1326.81 693 675 169.7
A 10 251 46455 269.84 693 675 169.7
A 8 249 16230 91.69 693 675 169.7
B 2 249 8009354 72541.78 516 498 110.4
B 5 185 155864 1407.26 516 498 110.4
B 4 236 64543 580.1 516 498 110.4
C 15 219 13878911 185282.41 269 267 74.9
C 1 16 17679 232.45 269 267 74.9
C 6 13 14450 189.35 269 267 74.9
D 2 62 2220227 12201.6 640 612 181.9
D 12 110 852058 4680.54 640 612 181.9
D 12 1 612121 3361.57 640 612 181.9

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

TCT plots

Parameter TCT0 TCT_healed
Tct