ASTROSAT CZTI

Data Quality Report

Orbit 57976

Creation date: 2026-06-16T02:37:28.800208
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_031T01_9000006584_57976cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57976cztM0_level2_quad_clean.evt
Size (bytes)541,048,32093,409,920
Size516.0 MB 89.1 MB
Events in quadrant A3,472,102625,521
Events in quadrant B4,578,003674,191
Events in quadrant C6,382,660521,180
Events in quadrant D5,092,392555,238

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150902
B0180012
C0234493
D0196612

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64802203.395062%
B64802634.058642%
C6479112817.410094%
D64791772.731903%

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 7605 6481 177 177 2.33% 2.73%
B 7605 6481 199 199 2.62% 3.07%
C 7604 6480 956 956 12.57% 14.75%
D 7604 6480 170 170 2.24% 2.62%

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 549073 3128.63 708 691 175.3
A 7 64 35824 200.44 708 691 175.3
A 13 248 32326 180.48 708 691 175.3
B 10 128 1503394 9955.41 702 676 150.9
B 0 63 56068 366.97 702 676 150.9
B 15 32 36944 240.27 702 676 150.9
C 15 224 3738161 21424.16 634 627 174.5
C 12 252 60081 340.8 634 627 174.5
C 6 223 33418 187.96 634 627 174.5
D 12 110 1998218 10321.36 678 650 193.5
D 2 31 109827 564.11 678 650 193.5
D 8 240 84150 431.44 678 650 193.5

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