ASTROSAT CZTI

Data Quality Report

Orbit 20170121_G06_051T01_9000000972_level2

Creation date: 2025-11-09T05:14:03.286950
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_051T01_9000000972cztM0_level2.fits modeM0/AS1G06_051T01_9000000972cztM0_level2_quad_clean.evt
Size (bytes)680,388,480657,527,040
Size648.9 MB 627.1 MB
Events in quadrant A4,094,3963,876,877
Events in quadrant B3,977,9623,910,636
Events in quadrant C4,045,4163,717,112
Events in quadrant D3,453,9703,375,784

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014860
B014860
C014860
D014860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01517640
B01574350
C01531490
D01762750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A734279131.243412%
B7342610661.451802%
C734248541.163107%
D7342826803.649834%

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 84954 72999 0 0 0.00% 0.00%
B 84954 72997 0 0 0.00% 0.00%
C 84954 72998 0 0 0.00% 0.00%
D 84954 72979 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 3977 11.03 1064 991 270.8
A 7 110 3364 8.76 1064 991 270.8
A 0 30 3059 7.64 1064 991 270.8
B 2 9 3370 11.2 1046 991 212.4
B 3 17 2720 8.14 1046 991 212.4
B 5 128 2712 8.1 1046 991 212.4
C 1 80 2977 6.94 1068 984 287.1
C 1 81 2888 6.63 1068 984 287.1
C 12 241 2843 6.48 1068 984 287.1
D 6 231 2576 6.34 984 893 265.4
D 3 14 2512 6.1 984 893 265.4
D 7 5 2470 5.94 984 893 265.4

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