ASTROSAT CZTI

Data Quality Report

Orbit 20200917_A09_038T17_9000003884_level2

Creation date: 2025-12-15T04:20:32.987322
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/AS1A09_038T17_9000003884cztM0_level2.fits modeM0/AS1A09_038T17_9000003884cztM0_level2_quad_clean.evt
Size (bytes)358,295,040253,362,240
Size341.7 MB 241.6 MB
Events in quadrant A2,245,9141,413,934
Events in quadrant B2,124,8341,431,106
Events in quadrant C2,269,7511,413,367
Events in quadrant D1,851,3821,054,889

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08160
B08160
C08160
D08160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0788540
B0831620
C0717990
D01112960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A338815371.584959%
B3387317845.266732%
C338806401.889020%
D33988456013.416500%

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 41696 33880 0 0 0.00% 0.00%
B 41696 33824 0 0 0.00% 0.00%
C 41696 33887 0 0 0.00% 0.00%
D 41696 33879 0 0 0.00% 0.00%

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 0 29 1901 9.44 585 555 142.5
A 7 110 1807 8.78 585 555 142.5
A 9 19 1629 7.54 585 555 142.5
B 2 9 1628 9.9 562 540 109.9
B 2 8 1419 8.0 562 540 109.9
B 5 255 1394 7.77 562 540 109.9
C 1 80 1747 7.84 599 569 150.2
C 1 81 1747 7.84 599 569 150.2
C 12 241 1593 6.82 599 569 150.2
D 10 189 1329 5.97 529 486 141.1
D 3 14 1325 5.94 529 486 141.1
D 6 231 1314 5.87 529 486 141.1

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