ASTROSAT CZTI

Data Quality Report

Orbit 56235

Creation date: 2026-02-19T11:17:43.733733
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_083T04_9000006550_56235cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56235cztM0_level2_quad_clean.evt
Size (bytes)916,623,36077,394,240
Size874.2 MB 73.8 MB
Events in quadrant A14,892,658226,874
Events in quadrant B4,543,815663,890
Events in quadrant C4,612,966590,070
Events in quadrant D9,348,000382,032

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0488723
B0181910
C0188700
D0325860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6889478869.502105%
B68903675.326560%
C68903665.312046%
D6890246135.718433%

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 6889 6889 4590 4590 66.63% 66.63%
B 6890 6890 179 179 2.60% 2.60%
C 6890 6890 301 301 4.37% 4.37%
D 6890 6890 2169 2169 31.48% 31.48%

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 8 176 4682493 36883.79 504 492 126.9
A 15 32 3540737 27889.28 504 492 126.9
A 12 115 3060609 24106.94 504 492 126.9
B 5 185 490404 3273.02 703 677 149.6
B 4 171 209037 1392.54 703 677 149.6
B 1 207 188387 1254.53 703 677 149.6
C 13 3 796803 4247.42 681 673 187.4
C 5 250 561670 2992.97 681 673 187.4
C 12 252 329325 1753.39 681 673 187.4
D 8 129 5161917 32278.74 558 533 159.9
D 6 239 1191785 7449.96 558 533 159.9
D 13 153 149000 928.5 558 533 159.9

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