ASTROSAT CZTI

Data Quality Report

Orbit 57799

Creation date: 2026-06-04T04:36:28.255579
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_57799cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57799cztM0_level2_quad_clean.evt
Size (bytes)670,055,04084,703,680
Size639.0 MB 80.8 MB
Events in quadrant A3,126,785632,360
Events in quadrant B5,231,750646,551
Events in quadrant C11,028,585325,260
Events in quadrant D4,929,079522,143

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01385161
B020046127
C037682631
D019261183

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6301310.491985%
B62873615.742007%
C6237320351.354818%
D62915198.249881%

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 7496 6324 19 19 0.25% 0.30%
B 7495 6323 176 176 2.35% 2.78%
C 7495 6267 3011 3011 40.17% 48.05%
D 7495 6314 573 573 7.65% 9.08%

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 459728 2729.62 677 660 168.2
A 3 128 31640 184.21 677 660 168.2
A 3 137 8064 44.02 677 660 168.2
B 4 80 2117212 15313.55 661 639 138.2
B 10 247 154356 1112.15 661 639 138.2
B 4 171 60330 431.87 661 639 138.2
C 9 38 7870721 54116.3 532 526 145.4
C 15 224 901943 6198.24 532 526 145.4
C 12 2 70259 479.49 532 526 145.4
D 12 0 1886857 10542.85 627 597 178.9
D 8 160 165267 920.39 627 597 178.9
D 2 249 131172 729.82 627 597 178.9

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