ASTROSAT CZTI

Data Quality Report

Orbit 36855

Creation date: 2024-06-27T21:32:25.516728
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/AS1A11_075T01_9000005244_36855cztM0_level2.evt modeM0/AS1A11_075T01_9000005244_36855cztM0_level2_quad_clean.evt
Size (bytes)330,232,32070,191,360
Size314.9 MB 66.9 MB
Events in quadrant A2,591,728591,619
Events in quadrant B772,2849,248
Events in quadrant C2,847,057605,598
Events in quadrant D3,440,317562,226

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0109013
B051552
C0114082
D0136802

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5063110.217262%
B50635063100.000000%
C50631032.034367%
D50632775.471065%

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 9219 5065 13 13 0.14% 0.26%
B 9218 5062 1 1 0.01% 0.02%
C 9219 5065 82 82 0.89% 1.62%
D 9219 5065 274 274 2.97% 5.41%

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 83 214434 1786.7 594 584 119.7
A 9 143 41915 345.32 594 584 119.7
A 15 223 15094 121.23 594 584 119.7
B 12 243 702739 187444.39 10 10 3.7
B 12 144 12869 3429.98 10 10 3.7
B 5 172 8738 2328.09 10 10 3.7
C 0 10 282938 2087.19 588 592 135.3
C 15 214 211949 1562.42 588 592 135.3
C 3 233 33070 240.09 588 592 135.3
D 12 217 488297 3483.48 574 557 140.0
D 13 171 207563 1478.45 574 557 140.0
D 12 17 176526 1256.78 574 557 140.0

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