ASTROSAT CZTI

Data Quality Report

Orbit 54903

Creation date: 2025-11-21T14:01:57.200659
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/AS1A14_039T06_9000006526_54903cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54903cztM0_level2_quad_clean.evt
Size (bytes)1,435,636,800243,178,560
Size1.3 GB 231.9 MB
Events in quadrant A11,171,9361,645,441
Events in quadrant B8,715,2831,773,135
Events in quadrant C15,726,2541,414,110
Events in quadrant D16,140,6601,291,801

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046163104
B03976165
C059766158
D061090183

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03610
B03610
C03620
D03611

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A179584832.689609%
B179623451.920722%
C17958230812.852211%
D17962229212.760272%

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 18393 17991 246 246 1.34% 1.37%
B 18393 17991 144 144 0.78% 0.80%
C 18394 17992 1685 1685 9.16% 9.37%
D 18394 17994 1867 1867 10.15% 10.38%

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 3 14 2216549 4702.84 1901 1852 470.9
A 0 8 912499 1933.73 1901 1852 470.9
A 13 248 293668 619.66 1901 1852 470.9
B 5 185 642759 1595.28 1882 1815 401.8
B 5 236 182832 450.54 1882 1815 401.8
B 10 245 124825 306.17 1882 1815 401.8
C 4 5 6029287 12548.44 1755 1741 480.3
C 1 16 511693 1061.64 1755 1741 480.3
C 6 223 485818 1007.77 1755 1741 480.3
D 11 129 3461003 6963.57 1759 1682 496.8
D 2 249 1450763 2916.98 1759 1682 496.8
D 6 42 1195297 2402.73 1759 1682 496.8

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