ASTROSAT CZTI

Data Quality Report

Orbit 51674

Creation date: 2025-04-22T12:01:05.367011
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/AS1A13_031T01_9000006462_51674cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51674cztM0_level2_quad_clean.evt
Size (bytes)733,936,320113,330,880
Size699.9 MB 108.1 MB
Events in quadrant A10,039,973596,759
Events in quadrant B4,935,616850,269
Events in quadrant C7,216,857681,599
Events in quadrant D4,317,990714,171

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0356386
B0204920
C0273700
D0190740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8472232927.490557%
B84732392.820725%
C8473113513.395492%
D8473971.144813%

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 8472 8472 1977 1977 23.34% 23.34%
B 8473 8473 112 112 1.32% 1.32%
C 8473 8473 914 914 10.79% 10.79%
D 8473 8473 79 79 0.93% 0.93%

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 7 64 5698757 29325.24 792 772 194.3
A 12 250 343566 1764.22 792 772 194.3
A 12 3 210514 1079.46 792 772 194.3
B 10 128 388587 1985.34 913 876 195.3
B 5 172 156493 796.87 913 876 195.3
B 1 207 121364 616.98 913 876 195.3
C 15 189 2669113 11631.56 851 843 229.4
C 15 231 391198 1701.64 851 843 229.4
C 13 3 186340 808.62 851 843 229.4
D 2 249 171358 696.02 895 863 245.0
D 7 126 123281 499.75 895 863 245.0
D 1 3 96756 391.47 895 863 245.0

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