ASTROSAT CZTI

Data Quality Report

Orbit 39870

Creation date: 2024-06-27T22:09:41.106986
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/AS1A12_032T02_9000005500_39870cztM0_level2.fits modeM0/AS1A12_032T02_9000005500_39870cztM0_level2_quad_clean.evt
Size (bytes)494,760,96089,078,400
Size471.8 MB 85.0 MB
Events in quadrant A4,401,370573,779
Events in quadrant B5,513,734583,377
Events in quadrant C3,574,295604,159
Events in quadrant D4,386,036540,307

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165873
B0202112
C0141382
D0169322

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A56555229.230769%
B565561610.893015%
C56551883.324492%
D56554157.338638%

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 7357 5655 420 420 5.71% 7.43%
B 7357 5655 453 453 6.16% 8.01%
C 7357 5655 181 181 2.46% 3.20%
D 7357 5655 385 385 5.23% 6.81%

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 14 250 1065188 8756.11 589 577 121.6
A 10 83 544124 4470.51 589 577 121.6
A 13 248 251277 2061.93 589 577 121.6
B 4 171 743893 6450.01 596 578 115.2
B 0 183 716846 6215.31 596 578 115.2
B 15 32 366672 3176.73 596 578 115.2
C 9 187 649409 4632.31 598 601 140.1
C 15 214 241698 1721.36 598 601 140.1
C 14 254 199726 1421.7 598 601 140.1
D 13 171 731954 5003.81 592 575 146.2
D 12 233 699856 4784.2 592 575 146.2
D 2 250 199904 1363.73 592 575 146.2

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