ASTROSAT CZTI

Data Quality Report

Orbit 55100

Creation date: 2025-12-05T12:08:56.701377
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_025T01_9000006530_55100cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55100cztM0_level2_quad_clean.evt
Size (bytes)1,645,925,760361,440,000
Size1.5 GB 344.7 MB
Events in quadrant A11,207,2262,416,058
Events in quadrant B11,321,2982,598,186
Events in quadrant C13,379,2802,301,584
Events in quadrant D23,127,3971,947,108

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0516775
B0516985
C0570625
D0861485

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04980
B04980
C04980
D04980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A244413851.575222%
B244424902.004746%
C244425132.098846%
D24442326413.354063%

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 29346 24447 38 38 0.13% 0.16%
B 29347 24448 42 42 0.14% 0.17%
C 29347 24448 260 260 0.89% 1.06%
D 29347 24447 2758 2758 9.40% 11.28%

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 4 3 192211 281.41 2733 2670 673.5
A 0 8 108044 156.45 2733 2670 673.5
A 7 237 104655 151.42 2733 2670 673.5
B 4 21 286088 491.3 2687 2585 577.0
B 5 185 158186 269.65 2687 2585 577.0
B 5 172 71008 118.57 2687 2585 577.0
C 13 3 982855 1355.72 2639 2614 723.0
C 6 223 595521 820.02 2639 2614 723.0
C 14 254 368842 506.51 2639 2614 723.0
D 2 249 5748078 8074.58 2510 2397 711.6
D 6 239 2794084 3923.24 2510 2397 711.6
D 15 94 1708550 2397.71 2510 2397 711.6

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