ASTROSAT CZTI

Data Quality Report

Orbit 20181127_A05_056T01_9000002540_level2

Creation date: 2025-11-26T01:56:06.984371
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/AS1A05_056T01_9000002540cztM0_level2.fits modeM0/AS1A05_056T01_9000002540cztM0_level2_quad_clean.evt
Size (bytes)999,002,880793,952,640
Size952.7 MB 757.2 MB
Events in quadrant A6,138,8064,487,779
Events in quadrant B5,984,0264,514,328
Events in quadrant C5,915,7524,144,192
Events in quadrant D5,216,9703,898,943

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02134090
B02125000
C02777790
D02346950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01860
C01860
D01860

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020820
B020820
C020820
D020820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10210213691.340816%
B10210215161.484790%
C10210238243.745274%
D10210228672.807976%

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 119643 102097 0 0 0.00% 0.00%
B 119643 102098 0 0 0.00% 0.00%
C 119642 102092 0 0 0.00% 0.00%
D 119643 102097 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 5779 10.79 1594 1490 397.4
A 7 110 4919 8.63 1594 1490 397.4
A 0 30 4568 7.74 1594 1490 397.4
B 2 9 4798 10.5 1577 1500 314.2
B 2 8 4104 8.29 1577 1500 314.2
B 3 17 3932 7.74 1577 1500 314.2
C 12 241 4194 6.74 1565 1457 405.8
C 2 191 3935 6.11 1565 1457 405.8
C 9 242 3916 6.06 1565 1457 405.8
D 3 14 3928 6.52 1488 1353 394.8
D 6 231 3771 6.12 1488 1353 394.8
D 10 189 3678 5.89 1488 1353 394.8

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