ASTROSAT CZTI

Data Quality Report

Orbit 51542

Creation date: 2025-04-09T02:24:54.078189
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_090T01_9000006458_51542cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51542cztM0_level2_quad_clean.evt
Size (bytes)859,723,20089,821,440
Size819.9 MB 85.7 MB
Events in quadrant A5,148,086681,942
Events in quadrant B6,034,783682,126
Events in quadrant C4,135,233654,081
Events in quadrant D15,934,770188,312

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204682
B0230533
C0175512
D0524492

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73693124.233953%
B736885811.644951%
C73682633.569490%
D7368537872.991314%

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 7499 7371 128 128 1.71% 1.74%
B 7497 7369 496 496 6.62% 6.73%
C 7498 7370 142 142 1.89% 1.93%
D 7498 7368 5036 5036 67.16% 68.35%

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 12 3 904595 4565.37 807 786 198.0
A 12 250 336922 1697.91 807 786 198.0
A 4 175 155580 781.9 807 786 198.0
B 10 44 1817143 10763.63 777 750 168.8
B 15 52 328131 1940.0 777 750 168.8
B 7 252 128449 756.72 777 750 168.8
C 13 3 435148 2037.17 781 775 213.2
C 14 224 158743 740.86 781 775 213.2
C 3 233 99247 461.82 781 775 213.2
D 8 176 13498886 115287.11 416 400 117.1
D 12 6 363409 3100.36 416 400 117.1
D 8 160 75671 642.87 416 400 117.1

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