ASTROSAT CZTI

Data Quality Report

Orbit 57828

Creation date: 2026-06-06T03:19:08.681522
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_083T16_9000006580_57828cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57828cztM0_level2_quad_clean.evt
Size (bytes)517,878,72092,442,240
Size493.9 MB 88.2 MB
Events in quadrant A2,902,568655,819
Events in quadrant B4,443,324642,824
Events in quadrant C6,895,195516,112
Events in quadrant D4,443,142547,626

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01302
B01300
C01304
D01302

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013446326
B017957365
C025465586
D018263522

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6266230.367060%
B62594787.637003%
C6247110317.656475%
D62454296.869496%

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 7482 6288 5 5 0.07% 0.08%
B 7482 6284 332 332 4.44% 5.28%
C 7464 6277 881 881 11.80% 14.04%
D 7482 6270 431 431 5.76% 6.87%

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 177334 1037.62 677 661 170.3
A 3 245 46027 266.44 677 661 170.3
A 3 128 30609 175.89 677 661 170.3
B 4 142 1223265 8820.91 649 625 138.6
B 2 249 229241 1649.38 649 625 138.6
B 4 158 94960 680.59 649 625 138.6
C 9 38 3645885 21926.79 602 594 166.2
C 15 224 751139 4514.6 602 594 166.2
C 12 252 45543 270.37 602 594 166.2
D 12 110 886037 4863.98 631 601 182.0
D 2 249 441084 2419.71 631 601 182.0
D 8 160 200515 1098.19 631 601 182.0

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