ASTROSAT CZTI

Data Quality Report

Orbit 57476

Creation date: 2026-05-13T13:09:44.838490
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_113T09_9000006574_57476cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57476cztM0_level2_quad_clean.evt
Size (bytes)542,419,20097,899,840
Size517.3 MB 93.4 MB
Events in quadrant A3,633,811657,999
Events in quadrant B4,213,354688,233
Events in quadrant C5,720,991584,836
Events in quadrant D5,972,153549,787

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154392
B0171982
C0218522
D0224382

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69331271.831819%
B69333765.423338%
C69336859.880283%
D69336779.764893%

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 7798 6933 21 21 0.27% 0.30%
B 7798 6933 178 178 2.28% 2.57%
C 7798 6933 522 522 6.69% 7.53%
D 7798 6933 593 593 7.60% 8.55%

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 10 251 401600 2145.13 760 742 186.9
A 8 9 230703 1230.6 760 742 186.9
A 3 128 15597 79.49 760 742 186.9
B 4 206 444151 2783.67 743 715 159.3
B 2 249 256847 1607.87 743 715 159.3
B 10 246 135157 843.96 743 715 159.3
C 15 224 2333836 12013.06 718 712 194.2
C 12 254 245248 1259.1 718 712 194.2
C 14 254 145317 744.56 718 712 194.2
D 15 142 2306608 11564.95 715 683 199.4
D 2 249 574611 2878.43 715 683 199.4
D 3 12 94193 468.98 715 683 199.4

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