ASTROSAT CZTI

Data Quality Report

Orbit 51870

Creation date: 2025-05-01T04:08:17.782102
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_011T05_9000006466_51870cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51870cztM0_level2_quad_clean.evt
Size (bytes)803,894,40081,273,600
Size766.7 MB 77.5 MB
Events in quadrant A5,493,615611,304
Events in quadrant B6,319,861586,607
Events in quadrant C3,893,130605,217
Events in quadrant D13,539,931196,935

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210142
B0233822
C0162052
D0447528

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65961612.440873%
B6596106516.146149%
C65961221.849606%
D6595460469.810462%

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 7636 6597 119 119 1.56% 1.80%
B 7636 6597 915 915 11.98% 13.87%
C 7636 6597 88 88 1.15% 1.33%
D 7635 6596 4156 4156 54.43% 63.01%

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 12 3 1375442 7958.48 691 674 172.7
A 4 175 351345 2030.02 691 674 172.7
A 4 3 185690 1071.05 691 674 172.7
B 4 170 2215834 15775.62 654 630 140.4
B 5 172 439649 3126.48 654 630 140.4
B 12 32 283073 2011.42 654 630 140.4
C 14 245 168680 885.54 685 679 189.7
C 14 80 128277 672.57 685 679 189.7
C 13 3 120851 633.43 685 679 189.7
D 11 129 10642685 94811.65 396 381 112.2
D 6 42 393606 3503.22 396 381 112.2
D 8 176 332451 2958.39 396 381 112.2

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