ASTROSAT CZTI

Data Quality Report

Orbit 58702

Creation date: 2026-08-03T23:25:38.916155
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_004T06_9000006594_58702cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58702cztM0_level2_quad_clean.evt
Size (bytes)1,373,892,480228,375,360
Size1.3 GB 217.8 MB
Events in quadrant A8,212,7641,607,740
Events in quadrant B8,902,3171,686,834
Events in quadrant C8,592,5691,537,794
Events in quadrant D23,915,952982,686

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0353585
B0373363
C0366343
D0821058

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03260
B03260
C03260
D03260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A159403171.988708%
B159425853.669552%
C159423782.371095%
D15941575336.089329%

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 19296 15944 35 35 0.18% 0.22%
B 19297 15946 235 235 1.22% 1.47%
C 19297 15946 169 169 0.88% 1.06%
D 19296 15944 4882 4882 25.30% 30.62%

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 689612 1544.87 1800 1755 445.3
A 10 251 201571 448.77 1800 1755 445.3
A 12 114 178738 397.49 1800 1755 445.3
B 6 255 1045137 2797.8 1753 1688 373.0
B 5 172 432171 1154.26 1753 1688 373.0
B 2 249 105887 279.39 1753 1688 373.0
C 13 3 470366 982.09 1749 1734 477.2
C 12 252 328389 684.55 1749 1734 477.2
C 14 254 311417 648.98 1749 1734 477.2
D 11 129 10954968 25899.31 1483 1417 422.9
D 2 62 3932644 9295.25 1483 1417 422.9
D 2 249 865642 2043.43 1483 1417 422.9

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