ASTROSAT CZTI

Data Quality Report

Orbit 52970

Creation date: 2025-07-18T11:34:53.635297
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_003T01_9000006486_52970cztM0_level2.fits modeM0/AS1A13_003T01_9000006486_52970cztM0_level2_quad_clean.evt
Size (bytes)1,186,107,84087,508,800
Size1.1 GB 83.5 MB
Events in quadrant A18,340,05370,761
Events in quadrant B6,446,904810,329
Events in quadrant C12,271,411558,218
Events in quadrant D6,240,403658,579

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0598210
B0245950
C0418830
D0239930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A78537853100.000000%
B78536778.620909%
C7852331242.180336%
D78535496.990959%

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 7927 7852 7445 7445 93.92% 94.82%
B 7927 7854 536 536 6.76% 6.82%
C 7927 7852 3037 3037 38.31% 38.68%
D 7928 7855 344 344 4.34% 4.38%

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 9 191 17769061 654068.08 98 96 27.2
A 9 175 52799 1939.98 98 96 27.2
A 15 174 40533 1488.47 98 96 27.2
B 10 254 2417342 13411.18 842 814 180.2
B 10 63 141598 781.32 842 814 180.2
B 12 17 128745 709.99 842 814 180.2
C 4 5 4178059 22243.72 674 666 187.8
C 12 254 1517586 8077.27 674 666 187.8
C 15 224 754690 4015.01 674 666 187.8
D 15 78 1184927 5001.84 819 782 236.7
D 2 62 566772 2390.75 819 782 236.7
D 4 233 306869 1292.92 819 782 236.7

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