ASTROSAT CZTI

Data Quality Report

Orbit 57451

Creation date: 2026-05-11T18:56:20.300455
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_57451cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57451cztM0_level2_quad_clean.evt
Size (bytes)419,351,04087,281,280
Size399.9 MB 83.2 MB
Events in quadrant A2,728,162589,242
Events in quadrant B4,158,765578,628
Events in quadrant C4,359,140539,663
Events in quadrant D3,821,579526,577

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121731
B0163411
C0169281
D0153681

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5852530.905673%
B585361310.473262%
C58533095.279344%
D58531672.853238%

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 7002 5853 1 1 0.01% 0.02%
B 7003 5854 320 320 4.57% 5.47%
C 7003 5854 242 242 3.46% 4.13%
D 7003 5854 132 132 1.88% 2.25%

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 204255 1284.51 650 632 158.5
A 13 254 8544 49.91 650 632 158.5
A 3 137 7589 43.89 650 632 158.5
B 4 206 1378380 10466.43 611 589 131.6
B 10 247 176158 1333.72 611 589 131.6
B 5 185 57263 430.53 611 589 131.6
C 15 224 1498209 8929.84 611 605 167.7
C 13 3 140738 835.58 611 605 167.7
C 1 16 127879 758.9 611 605 167.7
D 2 249 361559 2061.09 624 595 175.1
D 15 142 339527 1935.29 624 595 175.1
D 8 240 252568 1438.76 624 595 175.1

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