ASTROSAT CZTI

Data Quality Report

Orbit 57148

Creation date: 2026-04-21T09:47:32.954997
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_57148cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57148cztM0_level2_quad_clean.evt
Size (bytes)541,031,04090,357,120
Size516.0 MB 86.2 MB
Events in quadrant A2,888,085651,938
Events in quadrant B4,609,445638,313
Events in quadrant C7,576,445413,253
Events in quadrant D4,433,515567,143

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136713
B0183712
C0271322
D0175552

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6673570.854189%
B667370410.549978%
C6673238435.726060%
D66732273.401768%

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 7668 6674 3 3 0.04% 0.04%
B 7668 6674 476 476 6.21% 7.13%
C 7668 6674 1494 1494 19.48% 22.39%
D 7668 6674 188 188 2.45% 2.82%

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 18362 99.43 731 713 177.5
A 8 6 9789 51.13 731 713 177.5
A 13 254 9469 49.33 731 713 177.5
B 10 16 1590187 10928.82 680 655 145.4
B 10 247 193528 1326.1 680 655 145.4
B 0 63 54070 367.25 680 655 145.4
C 15 198 4762295 30042.3 583 576 158.5
C 14 254 210859 1326.7 583 576 158.5
C 12 252 109936 689.96 583 576 158.5
D 12 33 838825 4178.17 701 665 200.6
D 15 142 256153 1273.59 701 665 200.6
D 14 49 133651 662.93 701 665 200.6

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