ASTROSAT CZTI

Data Quality Report

Orbit 58875

Creation date: 2026-08-15T14:20:28.659522
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_004T07_9000006598_58875cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58875cztM0_level2_quad_clean.evt
Size (bytes)1,033,349,76066,660,480
Size985.5 MB 63.6 MB
Events in quadrant A5,479,190613,303
Events in quadrant B3,555,572686,426
Events in quadrant C15,768,14252,948
Events in quadrant D12,970,852233,594

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204811
B0146201
C0511881
D0427201

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61874867.855180%
B61871983.200259%
C6187571992.435752%
D6187407265.815419%

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 7372 6187 374 374 5.07% 6.04%
B 7372 6187 88 88 1.19% 1.42%
C 7371 6186 5717 5717 77.56% 92.42%
D 7372 6187 4009 4009 54.38% 64.80%

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 14 238 1714150 9897.03 710 690 173.1
A 3 14 715532 4128.96 710 690 173.1
A 15 233 133133 764.99 710 690 173.1
B 2 249 187817 1237.11 710 684 151.3
B 6 255 120301 790.77 710 684 151.3
B 4 236 106384 698.77 710 684 151.3
C 9 38 14589018 203446.11 255 251 71.7
C 6 223 60974 846.81 255 251 71.7
C 12 252 37731 522.67 255 251 71.7
D 12 110 10556789 68171.59 543 519 154.8
D 2 31 119607 769.06 543 519 154.8
D 11 129 92436 593.59 543 519 154.8

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

TCT plots

Parameter TCT0 TCT_healed
Tct