ASTROSAT CZTI

Data Quality Report

Orbit 20160113_G02_020T02_9000000268_level2

Creation date: 2025-10-25T20:47:13.704935
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/AS1G02_020T02_9000000268cztM0_level2.fits modeM0/AS1G02_020T02_9000000268cztM0_level2_quad_clean.evt
Size (bytes)181,713,600140,673,600
Size173.3 MB 134.2 MB
Events in quadrant A1,071,530738,849
Events in quadrant B1,050,214738,887
Events in quadrant C1,036,080703,418
Events in quadrant D892,482625,075

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0899130
B0914500
C0861070
D0875020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04280
B04280
C04300
D04300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21089570.270283%
B21105290.137408%
C21095680.322351%
D211036092.885846%

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 30397 21170 0 0 0.00% 0.00%
B 30397 21176 0 0 0.00% 0.00%
C 30397 21186 0 0 0.00% 0.00%
D 30397 21144 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 1000 11.16 278 261 66.2
A 7 110 956 10.49 278 261 66.2
A 0 30 765 7.61 278 261 66.2
B 2 9 832 11.16 277 265 50.8
B 5 128 685 8.27 277 265 50.8
B 14 254 683 8.23 277 265 50.8
C 12 241 740 7.1 273 254 68.4
C 2 191 693 6.41 273 254 68.4
C 9 242 667 6.03 273 254 68.4
D 6 231 685 7.45 253 233 60.7
D 10 189 619 6.36 253 233 60.7
D 6 44 616 6.31 253 233 60.7

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