ASTROSAT CZTI

Data Quality Report

Orbit 57602

Creation date: 2026-05-21T23:13:30.571203
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_070T08_9000006576_57602cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57602cztM0_level2_quad_clean.evt
Size (bytes)466,234,560111,617,280
Size444.6 MB 106.4 MB
Events in quadrant A3,373,285733,895
Events in quadrant B3,855,071781,949
Events in quadrant C4,197,903689,519
Events in quadrant D5,233,434638,597

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157410
B0169800
C0179910
D0209850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7701120.155824%
B7702881.142560%
C77011622.103623%
D77013925.090248%

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 7701 7701 4 4 0.05% 0.05%
B 7702 7702 40 40 0.52% 0.52%
C 7701 7701 137 137 1.78% 1.78%
D 7701 7701 396 396 5.14% 5.14%

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 44096 209.83 834 810 206.3
A 3 128 29801 140.54 834 810 206.3
A 13 248 27710 130.4 834 810 206.3
B 10 247 297458 1700.34 817 784 174.5
B 0 245 99118 563.59 817 784 174.5
B 5 185 63677 360.46 817 784 174.5
C 15 224 748681 3444.81 797 788 217.1
C 9 38 138386 633.78 797 788 217.1
C 8 7 47427 214.82 797 788 217.1
D 8 240 826901 3703.46 792 756 223.1
D 15 142 522129 2337.22 792 756 223.1
D 7 253 268073 1198.34 792 756 223.1

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