ASTROSAT CZTI

Data Quality Report

Orbit 57757

Creation date: 2026-06-01T09:09:45.660813
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_57757cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57757cztM0_level2_quad_clean.evt
Size (bytes)485,524,800100,523,520
Size463.0 MB 95.9 MB
Events in quadrant A3,582,510665,035
Events in quadrant B3,989,932715,475
Events in quadrant C6,265,543613,887
Events in quadrant D3,618,196585,771

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151722
B0164322
C0232092
D0155582

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66491502.255978%
B66492173.263649%
C66494646.978493%
D66491622.436457%

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 7874 6650 96 96 1.22% 1.44%
B 7874 6650 116 116 1.47% 1.74%
C 7874 6650 351 351 4.46% 5.28%
D 7874 6650 139 139 1.77% 2.09%

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 13 248 485205 2766.36 708 692 175.1
A 3 128 201210 1144.87 708 692 175.1
A 4 236 57361 323.56 708 692 175.1
B 4 158 430864 2866.93 707 680 150.1
B 4 80 180492 1198.34 707 680 150.1
B 10 16 139570 925.62 707 680 150.1
C 15 224 1488571 7925.87 686 681 187.7
C 9 38 1485334 7908.63 686 681 187.7
C 12 252 361814 1923.73 686 681 187.7
D 2 153 346667 1788.24 686 652 193.5
D 3 12 137806 708.83 686 652 193.5
D 2 249 106118 545.06 686 652 193.5

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