ASTROSAT CZTI

Data Quality Report

Orbit 20180515_G08_084T01_9000002100_level2

Creation date: 2025-11-22T09:22:49.055581
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/AS1G08_084T01_9000002100cztM0_level2.fits modeM0/AS1G08_084T01_9000002100cztM0_level2_quad_clean.evt
Size (bytes)1,223,176,3201,338,039,360
Size1.1 GB 1.2 GB
Events in quadrant A7,542,6228,506,640
Events in quadrant B7,213,6188,387,312
Events in quadrant C7,366,3387,907,694
Events in quadrant D6,256,2007,062,489

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025800
B025800
C025800
D025800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02644240
B02847130
C02726330
D03623770

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02110
B02110
C02110
D02120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12640613321.053747%
B12641431182.466499%
C12641011460.906574%
D12640172035.698531%

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 148054 126405 0 0 0.00% 0.00%
B 148054 126410 0 0 0.00% 0.00%
C 148054 126418 0 0 0.00% 0.00%
D 148054 126380 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 7277 11.27 1967 1855 480.9
A 7 110 6236 9.11 1967 1855 480.9
A 9 19 5752 8.1 1967 1855 480.9
B 2 9 6044 11.38 1909 1832 370.2
B 14 254 4762 7.92 1909 1832 370.2
B 3 80 4759 7.91 1909 1832 370.2
C 1 81 5572 7.49 1948 1828 499.9
C 1 80 5571 7.49 1948 1828 499.9
C 12 241 5225 6.79 1948 1828 499.9
D 3 14 4561 6.1 1789 1631 479.9
D 6 231 4509 6.0 1789 1631 479.9
D 7 3 4356 5.68 1789 1631 479.9

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