ASTROSAT CZTI

Data Quality Report

Orbit 20161226_G06_087T01_9000000926_level2

Creation date: 2025-11-08T22:36:39.050634
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/AS1G06_087T01_9000000926cztM0_level2.fits modeM0/AS1G06_087T01_9000000926cztM0_level2_quad_clean.evt
Size (bytes)184,412,160199,356,480
Size175.9 MB 190.1 MB
Events in quadrant A1,061,3001,182,263
Events in quadrant B1,066,5521,220,954
Events in quadrant C1,087,3681,176,481
Events in quadrant D897,260986,553

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04380
B04380
C04380
D04380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0516720
B0441340
C0443900
D0616160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2135314706.884279%
B213534051.896689%
C213533951.849857%
D2135317948.401630%

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 22843 21324 0 0 0.00% 0.00%
B 22843 21353 0 0 0.00% 0.00%
C 22843 21353 0 0 0.00% 0.00%
D 22843 21286 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 14 188 1059 10.95 275 255 73.4
A 0 29 1054 10.88 275 255 73.4
A 7 110 892 8.67 275 255 73.4
B 2 9 950 11.59 281 266 59.0
B 14 254 783 8.76 281 266 59.0
B 2 8 752 8.24 281 266 59.0
C 1 80 805 6.93 287 265 77.9
C 1 81 778 6.58 287 265 77.9
C 2 191 775 6.54 287 265 77.9
D 6 231 673 6.25 255 231 70.7
D 1 31 672 6.24 255 231 70.7
D 7 5 658 6.04 255 231 70.7

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