ASTROSAT CZTI

Data Quality Report

Orbit 20494

Creation date: 2024-06-27T18:16:01.574900
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_115T01_9000003030_20494cztM0_level2.evt modeM0/AS1A05_115T01_9000003030_20494cztM0_level2_quad_clean.evt
Size (bytes)580,821,12092,269,440
Size553.9 MB 88.0 MB
Events in quadrant A3,200,012622,089
Events in quadrant B3,614,615628,648
Events in quadrant C3,400,240597,682
Events in quadrant D6,954,763511,731

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0135232
B0148482
C0141102
D0249263

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6220210.337621%
B6220921.479100%
C6220781.254019%
D6219110117.703811%

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 7495 6221 2 2 0.03% 0.03%
B 7495 6221 21 21 0.28% 0.34%
C 7495 6221 0 0 0.00% 0.00%
D 7494 6220 1113 1113 14.85% 17.89%

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 12 96 130313 820.96 796 782 157.8
A 0 226 7033 39.62 796 782 157.8
A 3 137 5777 31.66 796 782 157.8
B 0 197 241277 1623.4 796 778 148.1
B 0 189 160721 1079.63 796 778 148.1
B 0 190 45209 299.91 796 778 148.1
C 3 233 288513 1612.95 766 773 178.4
C 14 238 121161 674.85 766 773 178.4
C 13 61 5506 26.53 766 773 178.4
D 7 38 1762178 9968.54 730 709 176.7
D 2 16 852789 4822.11 730 709 176.7
D 7 238 588644 3327.25 730 709 176.7

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