ASTROSAT CZTI

Data Quality Report

Orbit 51853

Creation date: 2025-04-30T09:49:08.097059
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/AS1C09_011T05_9000006466_51853cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51853cztM0_level2_quad_clean.evt
Size (bytes)628,830,72093,695,040
Size599.7 MB 89.4 MB
Events in quadrant A6,093,163601,264
Events in quadrant B4,509,804672,211
Events in quadrant C4,417,121591,674
Events in quadrant D7,722,836491,190

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0228182
B0181482
C0179512
D0276432

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68935978.660960%
B68933725.396779%
C68933985.773974%
D6893132819.265922%

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 7712 6893 565 565 7.33% 8.20%
B 7713 6894 294 294 3.81% 4.26%
C 7713 6893 335 335 4.34% 4.86%
D 7713 6893 1187 1187 15.39% 17.22%

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 4 249 1042171 5810.42 711 692 179.2
A 12 3 605283 3373.02 711 692 179.2
A 0 228 453089 2523.93 711 692 179.2
B 1 255 389442 2588.27 712 687 150.2
B 5 185 307888 2045.29 712 687 150.2
B 7 252 178531 1184.05 712 687 150.2
C 15 230 600866 3104.2 701 694 193.3
C 15 158 301229 1554.42 701 694 193.3
C 13 3 192188 990.44 701 694 193.3
D 11 129 3592104 19951.29 648 622 180.0
D 6 42 580552 3221.61 648 622 180.0
D 0 18 306222 1697.66 648 622 180.0

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