ASTROSAT CZTI

Data Quality Report

Orbit 20160113_G02_025T02_9000000270_level2

Creation date: 2025-10-25T21:06:04.707036
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/AS1G02_025T02_9000000270cztM0_level2.fits modeM0/AS1G02_025T02_9000000270cztM0_level2_quad_clean.evt
Size (bytes)761,970,240853,804,800
Size726.7 MB 814.3 MB
Events in quadrant A4,433,2025,171,899
Events in quadrant B4,433,4105,161,831
Events in quadrant C4,383,6664,915,138
Events in quadrant D3,728,1244,513,912

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03763470
B03892730
C03662080
D03695250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018160
B018180
C018160
D018160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01270
B01270
C01270
D01270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A889075990.673738%
B888935800.652470%
C889154990.561210%
D8891424642.771217%

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 104275 88966 0 0 0.00% 0.00%
B 104275 88938 0 0 0.00% 0.00%
C 104275 88958 0 0 0.00% 0.00%
D 104275 88775 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 7 110 3926 10.74 1149 1071 265.7
A 0 29 3886 10.59 1149 1071 265.7
A 14 79 3202 8.02 1149 1071 265.7
B 2 9 3568 11.4 1169 1106 215.9
B 14 254 2932 8.46 1169 1106 215.9
B 5 128 2894 8.28 1169 1106 215.9
C 12 241 2988 6.74 1156 1068 285.1
C 2 127 2932 6.54 1156 1068 285.1
C 2 191 2786 6.03 1156 1068 285.1
D 6 231 2658 6.7 1063 970 252.0
D 11 82 2629 6.58 1063 970 252.0
D 3 30 2616 6.53 1063 970 252.0

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