ASTROSAT CZTI

Data Quality Report

Orbit 20170524_A03_051T01_9000001242_level2

Creation date: 2025-11-13T19:19:25.006872
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/AS1A03_051T01_9000001242cztM0_level2.fits modeM0/AS1A03_051T01_9000001242cztM0_level2_quad_clean.evt
Size (bytes)611,798,400630,627,840
Size583.5 MB 601.4 MB
Events in quadrant A3,701,1763,819,452
Events in quadrant B3,594,6223,864,802
Events in quadrant C3,625,2423,614,204
Events in quadrant D3,159,3043,353,886

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01080
C01080
D01070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01497910
B01346500
C01442260
D01552190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013280
B013300
C013220
D013280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6481813012.007159%
B648166220.959640%
C6481717502.699909%
D6478517872.758355%

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 76152 65033 0 0 0.00% 0.00%
B 76152 65065 0 0 0.00% 0.00%
C 76152 65028 0 0 0.00% 0.00%
D 76152 65022 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 3496 10.74 961 900 241.7
A 7 110 3031 8.82 961 900 241.7
A 0 30 2805 7.88 961 900 241.7
B 2 9 3155 12.09 947 903 186.2
B 12 226 2504 8.59 947 903 186.2
B 14 254 2405 8.06 947 903 186.2
C 1 80 2612 6.83 957 888 252.3
C 1 81 2562 6.63 957 888 252.3
C 9 188 2459 6.23 957 888 252.3
D 3 14 2501 7.01 900 819 239.9
D 6 67 2274 6.07 900 819 239.9
D 6 231 2255 5.99 900 819 239.9

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