ASTROSAT CZTI

Data Quality Report

Orbit 57761

Creation date: 2026-06-01T16:14:24.707347
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_083T16_9000006580_57761cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57761cztM0_level2_quad_clean.evt
Size (bytes)540,518,400104,074,560
Size515.5 MB 99.3 MB
Events in quadrant A3,264,089689,967
Events in quadrant B4,930,694732,807
Events in quadrant C6,673,798606,989
Events in quadrant D4,568,249608,841

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153390
B0196280
C0249111
D0188330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7362270.366748%
B73632263.069401%
C736278610.676447%
D73622393.246400%

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 7362 7362 15 15 0.20% 0.20%
B 7363 7363 145 145 1.97% 1.97%
C 7362 7362 552 552 7.50% 7.50%
D 7362 7362 255 255 3.46% 3.46%

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 61 144525 748.25 777 755 192.1
A 3 128 36123 184.07 777 755 192.1
A 3 245 31054 157.69 777 755 192.1
B 10 16 634365 3865.05 766 736 163.9
B 4 80 626702 3818.31 766 736 163.9
B 4 142 208775 1269.01 766 736 163.9
C 15 224 2487374 12627.42 728 721 196.9
C 12 254 568915 2885.33 728 721 196.9
C 9 38 565273 2866.84 728 721 196.9
D 2 153 933409 4392.89 751 716 212.3
D 2 249 225807 1060.15 751 716 212.3
D 3 12 136004 637.19 751 716 212.3

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