ASTROSAT CZTI

Data Quality Report

Orbit 57140

Creation date: 2026-04-21T02:07:27.711498
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_083T10_9000006566_57140cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57140cztM0_level2_quad_clean.evt
Size (bytes)1,294,398,720229,867,200
Size1.2 GB 219.2 MB
Events in quadrant A7,173,3301,547,157
Events in quadrant B8,479,1021,634,612
Events in quadrant C13,002,3991,386,093
Events in quadrant D17,986,7721,255,619

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0336661
B0369321
C0503031
D0649031

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03320
B03320
C03320
D03320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A164731270.770959%
B164734392.664967%
C1647212467.564352%
D16472198412.044682%

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 16803 16474 12 12 0.07% 0.07%
B 16803 16473 210 210 1.25% 1.27%
C 16802 16474 1046 1046 6.23% 6.35%
D 16802 16473 1816 1816 10.81% 11.02%

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 14 144004 325.82 1785 1744 436.6
A 5 113 38868 85.03 1785 1744 436.6
A 4 3 35455 77.21 1785 1744 436.6
B 10 16 870863 2333.72 1741 1671 372.4
B 10 247 205535 547.36 1741 1671 372.4
B 0 213 130356 345.51 1741 1671 372.4
C 12 252 4434733 9917.91 1652 1638 447.0
C 15 198 1723654 3852.57 1652 1638 447.0
C 14 254 173094 383.59 1652 1638 447.0
D 15 142 6430998 14011.26 1628 1549 458.9
D 12 33 1956354 4259.97 1628 1549 458.9
D 6 159 1475745 3212.61 1628 1549 458.9

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