ASTROSAT CZTI

Data Quality Report

Orbit 01436

Creation date: 2026-03-07T11:35:17.381728
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/AS1P01_999T99_9000000238_01436cztM0_level2.fits modeM0/AS1P01_999T99_9000000238_01436cztM0_level2_quad_clean.evt
Size (bytes)2,284,672,320245,010,240
Size2.1 GB 233.7 MB
Events in quadrant A28,405,5951,547,626
Events in quadrant B20,058,8541,688,244
Events in quadrant C17,949,2891,610,582
Events in quadrant D16,951,8591,475,635

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03220
B03220
C03220
D03220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0957313
B0708453
C0646923
D0617783

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1589814268.969682%
B15898700.440307%
C15898160.100642%
D15898730.459177%

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 17918 15899 5154 5154 28.76% 32.42%
B 17918 15901 760 760 4.24% 4.78%
C 17918 15901 308 308 1.72% 1.94%
D 17918 15901 491 491 2.74% 3.09%

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 15 127 10671332 9804.33 4565 4598 1088.0
A 13 17 163338 145.91 4565 4598 1088.0
A 13 9 20241 14.38 4565 4598 1088.0
B 8 4 653085 568.13 4891 4907 1140.9
B 12 52 418845 362.82 4891 4907 1140.9
B 15 22 133494 112.71 4891 4907 1140.9
C 15 241 618477 500.88 4412 4559 1225.7
C 3 111 51640 38.41 4412 4559 1225.7
C 3 79 47757 35.24 4412 4559 1225.7
D 7 34 353583 267.69 4233 4384 1304.5
D 9 53 301931 228.09 4233 4384 1304.5
D 13 252 121443 89.73 4233 4384 1304.5

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