ASTROSAT CZTI

Data Quality Report

Orbit 20171210_A04_088T05_9000001764_level2

Creation date: 2025-11-19T01:40:27.134832
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_088T05_9000001764cztM0_level2.fits modeM0/AS1A04_088T05_9000001764cztM0_level2_quad_clean.evt
Size (bytes)1,114,905,6001,033,030,080
Size1.0 GB 985.2 MB
Events in quadrant A6,729,6406,002,121
Events in quadrant B6,401,4885,725,887
Events in quadrant C6,718,1805,950,857
Events in quadrant D5,606,4065,303,067

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01850
B01850
C01850
D01850

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02803050
B03081480
C02485650
D03269510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024680
B024680
C024680
D024680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12115635302.913599%
B12115664955.360857%
C12115611240.927730%
D12115677326.381855%

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 139803 121116 0 0 0.00% 0.00%
B 139803 121095 0 0 0.00% 0.00%
C 139803 121136 0 0 0.00% 0.00%
D 139804 120768 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 6730 11.64 1752 1635 437.6
A 7 110 5638 9.15 1752 1635 437.6
A 0 30 5139 8.01 1752 1635 437.6
B 2 9 5633 12.22 1691 1609 329.2
B 3 17 4428 8.56 1691 1609 329.2
B 2 8 4339 8.29 1691 1609 329.2
C 12 241 4803 6.83 1773 1642 462.9
C 2 191 4540 6.26 1773 1642 462.9
C 3 158 4420 6.0 1773 1642 462.9
D 6 231 4198 6.37 1600 1450 431.7
D 3 14 4114 6.17 1600 1450 431.7
D 7 5 3931 5.75 1600 1450 431.7

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