ASTROSAT CZTI

Data Quality Report

Orbit 55087

Creation date: 2025-12-03T19:05:01.030238
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_025T01_9000006530_55087cztM0_level2.fits modeM0/AS1A14_025T01_9000006530_55087cztM0_level2_quad_clean.evt
Size (bytes)410,826,240109,535,040
Size391.8 MB 104.5 MB
Events in quadrant A3,234,722712,433
Events in quadrant B3,324,647770,206
Events in quadrant C4,039,664676,537
Events in quadrant D4,019,136630,578

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154100
B0155293
C0175740
D0174052

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A757340.052819%
B7572160.211305%
C7573520.686650%
D75721191.571580%

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 7572 7572 2 2 0.03% 0.03%
B 7572 7571 8 8 0.11% 0.11%
C 7572 7572 41 41 0.54% 0.54%
D 7572 7572 123 123 1.62% 1.62%

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 4 3 28842 139.09 816 794 201.7
A 0 8 26976 129.83 816 794 201.7
A 13 254 22237 106.33 816 794 201.7
B 5 185 68166 387.13 804 773 174.1
B 4 169 28400 158.7 804 773 174.1
B 0 182 28181 157.44 804 773 174.1
C 9 38 372897 1723.26 790 781 215.9
C 13 3 215561 994.64 790 781 215.9
C 12 252 135092 621.99 790 781 215.9
D 9 1 281890 1292.89 782 749 217.5
D 7 96 203178 930.91 782 749 217.5
D 11 129 115300 526.79 782 749 217.5

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