ASTROSAT CZTI

Data Quality Report

Orbit 20170921_A03_084T01_9000001544_level2

Creation date: 2025-11-17T06:00:02.962454
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/AS1A03_084T01_9000001544cztM0_level2.fits modeM0/AS1A03_084T01_9000001544cztM0_level2_quad_clean.evt
Size (bytes)213,287,040173,194,560
Size203.4 MB 165.2 MB
Events in quadrant A1,311,978998,956
Events in quadrant B1,223,886928,625
Events in quadrant C1,278,768939,814
Events in quadrant D1,085,864818,317

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04620
B04620
C04620
D04620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0476300
B0646760
C0465020
D0621460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A226412651.170443%
B2264214976.611607%
C226421440.635986%
D226428933.943998%

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 27962 22640 0 0 0.00% 0.00%
B 27963 22639 0 0 0.00% 0.00%
C 27963 22643 0 0 0.00% 0.00%
D 27963 22638 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 1257 10.72 341 319 87.5
A 7 110 1080 8.7 341 319 87.5
A 9 19 998 7.76 341 319 87.5
B 2 9 1050 11.19 323 308 66.3
B 14 254 836 7.96 323 308 66.3
B 5 225 815 7.65 323 308 66.3
C 1 80 1002 7.57 337 313 91.1
C 1 81 968 7.19 337 313 91.1
C 12 241 881 6.24 337 313 91.1
D 3 14 785 5.92 309 281 85.1
D 4 160 784 5.91 309 281 85.1
D 3 30 783 5.9 309 281 85.1

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