ASTROSAT CZTI

Data Quality Report

Orbit 20190928_A06_002T02_9000003206_level2

Creation date: 2026-03-17T16:37:03.651947
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/AS1A06_002T02_9000003206cztM0_level2.fits modeM0/AS1A06_002T02_9000003206cztM0_level2_quad_clean.evt
Size (bytes)1,867,118,4001,629,025,920
Size1.7 GB 1.5 GB
Events in quadrant A11,504,6089,501,288
Events in quadrant B11,081,0289,566,939
Events in quadrant C11,211,0569,055,608
Events in quadrant D9,524,5207,988,718

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04023850
B04193350
C04014520
D05197700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02990
B02990
C02990
D02990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039240
B039240
C039240
D039240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19302022441.162574%
B19302132761.697225%
C19302331401.626749%
D19302297765.064708%

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 222668 193012 0 0 0.00% 0.00%
B 222668 193007 0 0 0.00% 0.00%
C 222668 193025 0 0 0.00% 0.00%
D 222669 192986 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 11161 11.49 2994 2812 726.9
A 7 110 9257 8.87 2994 2812 726.9
A 0 30 8665 8.05 2994 2812 726.9
B 2 9 8957 10.8 2932 2799 570.1
B 2 8 7556 8.34 2932 2799 570.1
B 5 128 7212 7.74 2932 2799 570.1
C 12 241 8098 7.03 2963 2765 758.9
C 9 209 7538 6.29 2963 2765 758.9
C 12 250 7508 6.25 2963 2765 758.9
D 3 14 6813 6.03 2719 2472 720.0
D 7 3 6724 5.91 2719 2472 720.0
D 6 231 6617 5.76 2719 2472 720.0

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