ASTROSAT CZTI

Data Quality Report

Orbit 51711

Creation date: 2025-04-22T12:01:20.241750
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_51711cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51711cztM0_level2_quad_clean.evt
Size (bytes)581,163,840100,978,560
Size554.2 MB 96.3 MB
Events in quadrant A5,603,263668,318
Events in quadrant B4,641,545697,822
Events in quadrant C6,960,032576,307
Events in quadrant D3,763,541626,157

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0214413
B0187072
C0257152
D0162452

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70173144.474847%
B70175087.239561%
C7017110815.790224%
D70181041.481904%

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 9082 7019 220 220 2.42% 3.13%
B 9082 7019 298 298 3.28% 4.25%
C 9082 7020 1186 1186 13.06% 16.89%
D 9083 7020 73 73 0.80% 1.04%

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 78 1608785 8711.41 744 726 184.6
A 3 14 375004 2027.59 744 726 184.6
A 12 3 182110 982.62 744 726 184.6
B 1 223 750551 4770.57 727 701 157.2
B 12 32 360397 2288.4 727 701 157.2
B 8 128 218918 1388.3 727 701 157.2
C 9 38 2118495 11022.95 704 699 192.1
C 0 192 1330567 6921.85 704 699 192.1
C 13 3 330245 1715.26 704 699 192.1
D 3 12 255803 1261.53 726 701 202.2
D 15 107 179038 881.91 726 701 202.2
D 6 228 134237 660.36 726 701 202.2

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