ASTROSAT CZTI

Data Quality Report

Orbit 20180521_A04_130T03_9000002108_level2

Creation date: 2025-11-22T10:32:57.085490
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/AS1A04_130T03_9000002108cztM0_level2.fits modeM0/AS1A04_130T03_9000002108cztM0_level2_quad_clean.evt
Size (bytes)245,810,880171,702,720
Size234.4 MB 163.7 MB
Events in quadrant A1,509,850930,126
Events in quadrant B1,433,494894,289
Events in quadrant C1,472,468839,787
Events in quadrant D1,296,380802,598

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05160
B05160
C05160
D05160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0541770
B0592750
C0543630
D0611960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A251646912.745986%
B2516411134.422985%
C251644271.696869%
D251647112.825465%

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 30561 25162 0 0 0.00% 0.00%
B 30561 25125 0 0 0.00% 0.00%
C 30561 25164 0 0 0.00% 0.00%
D 30561 25162 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 1464 10.94 393 367 100.3
A 7 110 1217 8.48 393 367 100.3
A 9 19 1131 7.62 393 367 100.3
B 2 9 1229 11.38 378 360 76.4
B 3 80 983 8.16 378 360 76.4
B 3 17 946 7.67 378 360 76.4
C 1 81 1105 7.38 388 362 100.7
C 1 80 1055 6.88 388 362 100.7
C 12 241 1046 6.79 388 362 100.7
D 6 231 934 5.99 369 336 99.8
D 15 46 920 5.85 369 336 99.8
D 1 3 914 5.79 369 336 99.8

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