ASTROSAT CZTI

Data Quality Report

Orbit 55173

Creation date: 2025-12-09T14:16:17.995690
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_022T16_9000006532_55173cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55173cztM0_level2_quad_clean.evt
Size (bytes)453,769,920104,708,160
Size432.7 MB 99.9 MB
Events in quadrant A4,467,045668,721
Events in quadrant B3,272,183730,474
Events in quadrant C4,185,848646,928
Events in quadrant D4,294,556607,927

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187131
B0155751
C0177931
D0182731

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74223644.904338%
B74222343.152789%
C74232573.462212%
D74232473.327496%

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 7792 7423 170 170 2.18% 2.29%
B 7792 7423 17 17 0.22% 0.23%
C 7793 7424 122 122 1.57% 1.64%
D 7793 7424 143 143 1.83% 1.93%

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 78 886274 4538.45 792 772 195.1
A 0 8 379631 1941.76 792 772 195.1
A 12 64 38084 191.23 792 772 195.1
B 2 249 62452 363.52 784 755 169.7
B 5 185 56269 327.09 784 755 169.7
B 0 182 25180 143.91 784 755 169.7
C 13 3 342595 1629.31 766 760 209.8
C 1 16 201704 957.77 766 760 209.8
C 10 22 190372 903.76 766 760 209.8
D 11 129 1040291 4784.15 767 735 217.3
D 2 249 86434 394.4 767 735 217.3
D 3 12 53718 243.83 767 735 217.3

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