ASTROSAT CZTI

Data Quality Report

Orbit 56741

Creation date: 2026-03-25T16:58:27.602749
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_56741cztM0_level2.fits modeM0/AS1A14_083T05_9000006560_56741cztM0_level2_quad_clean.evt
Size (bytes)438,618,24089,850,240
Size418.3 MB 85.7 MB
Events in quadrant A3,431,761598,939
Events in quadrant B4,026,489620,523
Events in quadrant C5,331,573520,880
Events in quadrant D2,956,099540,419

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150051
B0165381
C0204751
D0133931

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63001492.365079%
B63014276.776702%
C630166310.522139%
D6301320.507856%

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 7305 6301 110 110 1.51% 1.75%
B 7306 6302 235 235 3.22% 3.73%
C 7306 6302 705 705 9.65% 11.19%
D 7306 6302 18 18 0.25% 0.29%

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 359863 2154.47 670 652 166.7
A 3 62 295357 1767.58 670 652 166.7
A 10 251 166709 995.97 670 652 166.7
B 4 206 496333 3510.49 656 633 141.2
B 8 128 398882 2820.36 656 633 141.2
B 5 185 200455 1415.12 656 633 141.2
C 15 230 2116350 12333.76 620 612 171.5
C 6 223 335353 1951.38 620 612 171.5
C 13 3 285428 1660.34 620 612 171.5
D 2 249 140038 771.57 643 616 180.7
D 5 113 82386 452.52 643 616 180.7
D 5 173 50930 278.44 643 616 180.7

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