ASTROSAT CZTI

Data Quality Report

Orbit 56187

Creation date: 2026-02-15T18:23:41.680501
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_56187cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56187cztM0_level2_quad_clean.evt
Size (bytes)560,488,320100,949,760
Size534.5 MB 96.3 MB
Events in quadrant A7,691,857601,566
Events in quadrant B3,847,382737,407
Events in quadrant C4,639,876624,665
Events in quadrant D4,039,267617,889

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0275154
B0159782
C0186072
D0165692

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6815117817.285400%
B68152613.829787%
C68155638.261189%
D68152012.949376%

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 7966 6817 905 905 11.36% 13.28%
B 7966 6817 107 107 1.34% 1.57%
C 7966 6817 338 338 4.24% 4.96%
D 7966 6817 102 102 1.28% 1.50%

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 15 32 2197075 12353.59 717 698 177.8
A 8 176 1554956 8741.97 717 698 177.8
A 7 64 382349 2146.61 717 698 177.8
B 4 141 274614 1714.35 752 725 159.8
B 5 185 180609 1125.94 752 725 159.8
B 4 171 103291 641.99 752 725 159.8
C 12 254 1442351 7299.13 715 707 197.5
C 6 223 187063 943.53 715 707 197.5
C 12 252 133741 673.56 715 707 197.5
D 11 129 196673 931.59 741 707 210.4
D 2 249 168216 796.31 741 707 210.4
D 8 129 154241 729.88 741 707 210.4

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