ASTROSAT CZTI

Data Quality Report

Orbit 51686

Creation date: 2025-04-23T11:27:55.605351
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/AS1A13_031T01_9000006462_51686cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51686cztM0_level2_quad_clean.evt
Size (bytes)504,768,96098,392,320
Size481.4 MB 93.8 MB
Events in quadrant A3,795,788644,989
Events in quadrant B3,696,179697,928
Events in quadrant C5,807,289577,898
Events in quadrant D4,846,167574,890

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0159801
B0158011
C0221161
D0192331

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69432163.111047%
B69432443.514331%
C694384812.213740%
D69433525.069855%

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 7713 6944 49 49 0.64% 0.71%
B 7713 6944 54 54 0.70% 0.78%
C 7713 6944 649 649 8.41% 9.35%
D 7713 6944 248 248 3.22% 3.57%

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 3 14 109762 584.45 763 743 186.5
A 5 240 102094 543.34 763 743 186.5
A 10 223 85104 452.26 763 743 186.5
B 5 185 174190 1080.82 750 724 160.5
B 0 171 93781 579.81 750 724 160.5
B 1 223 65099 401.1 750 724 160.5
C 15 189 1894476 9810.54 707 701 193.0
C 0 176 360109 1861.88 707 701 193.0
C 13 3 256435 1324.81 707 701 193.0
D 10 172 784508 3921.7 730 705 199.9
D 15 94 532702 2661.81 730 705 199.9
D 3 12 174101 867.57 730 705 199.9

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