ASTROSAT CZTI

Data Quality Report

Orbit 35975

Creation date: 2022-07-18T23:17:57.363703
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/AS1A11_050T19_9000005156_35975cztM0_level2.evt modeM0/AS1A11_050T19_9000005156_35975cztM0_level2_quad_clean.evt
Size (bytes)848,488,32078,618,240
Size809.2 MB 75.0 MB
Events in quadrant A2,433,791654,072
Events in quadrant B13,971,219171,389
Events in quadrant C4,921,093574,485
Events in quadrant D4,017,175611,041

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0106682
B0450821
C0181151
D0153901

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A524140.076321%
B52415241100.000000%
C524185816.370922%
D52412574.903644%

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 6824 5242 0 0 0.00% 0.00%
B 6823 5240 5171 5171 75.79% 98.68%
C 6824 5242 750 750 10.99% 14.31%
D 6824 5242 255 255 3.74% 4.86%

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 10 83 130124 1087.96 586 576 119.1
A 15 169 19768 161.18 586 576 119.1
A 13 254 8306 64.92 586 576 119.1
B 5 31 5991626 163221.6 186 181 36.7
B 5 15 5172392 140903.66 186 181 36.7
B 5 14 1581203 43070.9 186 181 36.7
C 9 187 2621649 21972.39 514 518 119.3
C 15 214 195261 1632.49 514 518 119.3
C 0 10 88237 735.33 514 518 119.3
D 1 52 544531 3967.67 560 543 137.1
D 13 249 509386 3711.33 560 543 137.1
D 12 17 291485 2122.04 560 543 137.1

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