ASTROSAT CZTI

Data Quality Report

Orbit 51940

Creation date: 2025-05-06T09:44:32.155226
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_011T06_9000006468_51940cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51940cztM0_level2_quad_clean.evt
Size (bytes)1,540,932,480123,189,120
Size1.4 GB 117.5 MB
Events in quadrant A8,961,514951,833
Events in quadrant B12,145,982869,310
Events in quadrant C17,437,889574,437
Events in quadrant D17,653,940577,506

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340652
B0436482
C0593974
D0599622

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02220
B02220
C02220
D02220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A109158277.576729%
B10915252723.151626%
C10914509846.710647%
D10914448241.066520%

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 12335 10914 621 621 5.03% 5.69%
B 12335 10914 2031 2031 16.47% 18.61%
C 12334 10913 4397 4397 35.65% 40.29%
D 12334 10913 4569 4569 37.04% 41.87%

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 64 1449435 5178.55 1113 1085 279.7
A 12 3 1300095 4644.59 1113 1085 279.7
A 15 239 369003 1315.49 1113 1085 279.7
B 12 32 6615799 30474.87 1019 985 217.1
B 10 254 216979 995.1 1019 985 217.1
B 4 206 171191 784.15 1019 985 217.1
C 15 224 9294714 39654.98 838 831 234.4
C 15 218 3033641 12940.34 838 831 234.4
C 15 209 882074 3760.07 838 831 234.4
D 12 17 8773137 32082.71 889 854 273.4
D 6 42 2639548 9650.45 889 854 273.4
D 2 172 1056057 3859.17 889 854 273.4

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