ASTROSAT CZTI

Data Quality Report

Orbit 20180624_A04_130T03_9000002186_level2

Creation date: 2025-11-23T02:53:26.685372
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/AS1A04_130T03_9000002186cztM0_level2.fits modeM0/AS1A04_130T03_9000002186cztM0_level2_quad_clean.evt
Size (bytes)182,577,600132,975,360
Size174.1 MB 126.8 MB
Events in quadrant A1,166,266763,695
Events in quadrant B1,097,846742,102
Events in quadrant C1,100,904679,556
Events in quadrant D985,264661,168

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0373280
B0392550
C0413030
D0373330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03480
B03480
C03480
D03480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A171063351.958377%
B171064602.689115%
C171062431.420554%
D171062701.578394%

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 20815 17106 0 0 0.00% 0.00%
B 20815 17102 0 0 0.00% 0.00%
C 20815 17105 0 0 0.00% 0.00%
D 20815 17105 0 0 0.00% 0.00%

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 0 29 1162 11.85 303 287 73.8
A 7 110 925 8.64 303 287 73.8
A 15 236 877 7.99 303 287 73.8
B 2 9 873 10.02 291 279 59.3
B 5 128 733 7.66 291 279 59.3
B 3 17 725 7.52 291 279 59.3
C 1 80 787 6.87 290 272 75.0
C 1 81 771 6.65 290 272 75.0
C 12 241 753 6.41 290 272 75.0
D 10 189 698 5.81 281 257 75.9
D 3 14 697 5.8 281 257 75.9
D 7 3 693 5.74 281 257 75.9

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