ASTROSAT CZTI

Data Quality Report

Orbit 20180312_G08_031T03_9000001972_level2

Creation date: 2025-11-20T02:14:46.024458
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_031T03_9000001972cztM0_level2.fits modeM0/AS1G08_031T03_9000001972cztM0_level2_quad_clean.evt
Size (bytes)222,572,160188,357,760
Size212.3 MB 179.6 MB
Events in quadrant A1,308,0221,030,919
Events in quadrant B1,310,4841,082,531
Events in quadrant C1,357,5721,045,887
Events in quadrant D1,168,402949,350

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04740
B04740
C04740
D04740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0800390
B0532430
C0481740
D0603800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0510
B0510
C0510
D0510

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23169319213.777030%
B231697393.189607%
C231691990.858906%
D231699754.208209%

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 28294 23157 0 0 0.00% 0.00%
B 28294 23152 0 0 0.00% 0.00%
C 28294 23169 0 0 0.00% 0.00%
D 28294 23161 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 1310 11.43 339 318 86.8
A 7 110 1048 8.41 339 318 86.8
A 0 30 1005 7.92 339 318 86.8
B 2 9 1126 11.28 345 329 70.7
B 5 225 902 8.11 345 329 70.7
B 14 254 892 7.97 345 329 70.7
C 3 126 930 6.27 359 334 95.0
C 12 241 915 6.12 359 334 95.0
C 2 191 913 6.09 359 334 95.0
D 6 231 848 5.91 333 304 92.1
D 3 14 820 5.6 333 304 92.1
D 6 67 813 5.53 333 304 92.1

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