ASTROSAT CZTI

Data Quality Report

Orbit 24870

Creation date: 2024-06-27T19:10:48.506824
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/AS1A07_027T02_9000003640_24870cztM0_level2.evt modeM0/AS1A07_027T02_9000003640_24870cztM0_level2_quad_clean.evt
Size (bytes)2,488,464,000462,332,160
Size2.3 GB 440.9 MB
Events in quadrant A15,292,9093,025,842
Events in quadrant B15,592,5823,095,698
Events in quadrant C19,177,7272,924,101
Events in quadrant D23,273,9962,890,339

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610
B0610
C0610
D0610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06120
B06120
C06120
D06120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0638665
B0648935
C0753897
D0898035

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A300902320.771020%
B300912060.684590%
C3009014954.968428%
D3009010473.479561%

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 39034 30095 94 94 0.24% 0.31%
B 39035 30096 17 17 0.04% 0.06%
C 39035 30095 1014 1014 2.60% 3.37%
D 39035 30095 851 851 2.18% 2.83%

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 6 16 274911 358.39 3867 3799 756.5
A 12 96 67808 84.61 3867 3799 756.5
A 13 254 45034 54.51 3867 3799 756.5
B 0 189 165338 227.02 3843 3753 711.8
B 0 190 119830 163.08 3843 3753 711.8
B 7 205 114170 155.13 3843 3753 711.8
C 7 247 3478829 4091.49 3701 3736 849.3
C 2 16 595365 696.57 3701 3736 849.3
C 14 238 592801 693.55 3701 3736 849.3
D 12 218 3712543 4082.42 3805 3707 908.5
D 1 52 2790384 3067.37 3805 3707 908.5
D 8 195 1863261 2046.86 3805 3707 908.5

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