ASTROSAT CZTI

Data Quality Report

Orbit 20171129_G08_060T01_9000001736_level2

Creation date: 2025-11-18T20:01:33.870471
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/AS1G08_060T01_9000001736cztM0_level2.fits modeM0/AS1G08_060T01_9000001736cztM0_level2_quad_clean.evt
Size (bytes)173,266,560216,103,680
Size165.2 MB 206.1 MB
Events in quadrant A1,036,1001,383,049
Events in quadrant B985,0981,352,836
Events in quadrant C1,034,6041,302,896
Events in quadrant D860,0801,175,090

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0459550
B0493430
C0391440
D0558240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A193112531.310134%
B193119725.033401%
C19311630.326239%
D1931113156.809590%

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 22496 19311 0 0 0.00% 0.00%
B 22496 19301 0 0 0.00% 0.00%
C 22496 19311 0 0 0.00% 0.00%
D 22496 19304 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 1087 11.89 270 254 70.1
A 14 188 1020 10.93 270 254 70.1
A 7 110 945 9.86 270 254 70.1
B 2 9 874 11.77 260 248 53.2
B 14 254 683 8.18 260 248 53.2
B 2 8 664 7.82 260 248 53.2
C 12 241 767 7.07 273 253 72.7
C 3 126 696 6.09 273 253 72.7
C 4 254 689 6.0 273 253 72.7
D 3 14 663 6.5 245 223 67.7
D 6 231 638 6.13 245 223 67.7
D 3 31 633 6.05 245 223 67.7

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