ASTROSAT CZTI

Data Quality Report

Orbit 51816

Creation date: 2025-04-27T13:12:16.758364
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_090T01_9000006464_51816cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51816cztM0_level2_quad_clean.evt
Size (bytes)590,241,60093,764,160
Size562.9 MB 89.4 MB
Events in quadrant A4,222,582635,669
Events in quadrant B4,150,818692,490
Events in quadrant C4,722,120587,791
Events in quadrant D8,233,565456,060

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170342
B0168942
C0188012
D0290982

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67001892.820896%
B67002243.343284%
C67005658.432836%
D6700173225.850746%

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 7700 6702 77 77 1.00% 1.15%
B 7700 6702 71 71 0.92% 1.06%
C 7700 6702 459 459 5.96% 6.85%
D 7700 6702 1397 1397 18.14% 20.84%

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 15 174 332315 1847.36 736 717 179.5
A 12 3 311865 1733.43 736 717 179.5
A 11 3 173497 962.57 736 717 179.5
B 1 207 211506 1342.58 730 703 157.0
B 4 81 186560 1183.7 730 703 157.0
B 10 254 142335 902.04 730 703 157.0
C 9 38 953330 4892.5 713 709 194.7
C 12 254 194754 996.58 713 709 194.7
C 1 3 186636 954.89 713 709 194.7
D 11 129 4475668 25121.1 635 613 178.1
D 12 6 542202 3040.26 635 613 178.1
D 0 18 419674 2352.43 635 613 178.1

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