ASTROSAT CZTI

Data Quality Report

Orbit 51587

Creation date: 2025-04-12T03:16:27.154044
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_037T05_9000006460_51587cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51587cztM0_level2_quad_clean.evt
Size (bytes)784,946,880104,143,680
Size748.6 MB 99.3 MB
Events in quadrant A7,673,058630,547
Events in quadrant B5,977,700780,869
Events in quadrant C6,168,394591,906
Events in quadrant D8,631,249605,520

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0282160
B0231060
C0237440
D0311330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7827136617.452408%
B78265376.861743%
C7826156820.035778%
D7826100612.854587%

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 7827 7827 970 970 12.39% 12.39%
B 7826 7826 337 337 4.31% 4.31%
C 7826 7826 417 417 5.33% 5.33%
D 7826 7826 954 954 12.19% 12.19%

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 12 250 1782359 9169.05 777 761 194.3
A 7 160 1295316 6662.47 777 761 194.3
A 12 3 491500 2525.6 777 761 194.3
B 10 44 1373337 7835.62 822 796 175.2
B 1 223 375999 2141.97 822 796 175.2
B 5 185 300645 1711.79 822 796 175.2
C 15 198 1183140 6176.77 693 689 191.4
C 15 147 926611 4836.74 693 689 191.4
C 0 177 449477 2344.33 693 689 191.4
D 8 176 1310163 6066.46 771 745 215.8
D 5 113 1147853 5314.49 771 745 215.8
D 6 228 1050349 4862.76 771 745 215.8

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