ASTROSAT CZTI

Data Quality Report

Orbit 52637

Creation date: 2025-06-23T20:11:51.085736
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/AS1C09_011T06_9000006478_52637cztM0_level2.fits modeM0/AS1C09_011T06_9000006478_52637cztM0_level2_quad_clean.evt
Size (bytes)2,530,454,400312,120,000
Size2.4 GB 297.7 MB
Events in quadrant A14,681,4032,169,876
Events in quadrant B19,719,4912,257,587
Events in quadrant C31,292,3321,577,497
Events in quadrant D26,115,6461,779,330

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0601974
B0754024
C01098225
D0944874

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04900
B04900
C04900
D04900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A241809834.065343%
B2418017547.253929%
C24179516621.365648%
D24180364715.082713%

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 25860 24184 541 541 2.09% 2.24%
B 25860 24184 962 962 3.72% 3.98%
C 25859 24183 4637 4637 17.93% 19.17%
D 25860 24184 3081 3081 11.91% 12.74%

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 8 9 799013 1300.09 2482 2417 612.7
A 3 46 625754 1017.32 2482 2417 612.7
A 14 235 624243 1014.85 2482 2417 612.7
B 10 128 4165850 8148.19 2421 2341 511.0
B 5 185 1391540 2718.73 2421 2341 511.0
B 10 254 1388934 2713.63 2421 2341 511.0
C 15 248 17354767 28038.41 2238 2214 618.9
C 15 144 1761867 2843.26 2238 2214 618.9
C 15 157 780472 1257.52 2238 2214 618.9
D 8 176 6460938 9829.95 2302 2197 657.0
D 6 42 2733562 4157.03 2302 2197 657.0
D 11 245 1052875 1599.09 2302 2197 657.0

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