ASTROSAT CZTI

Data Quality Report

Orbit 20200125_A07_127T02_9000003460_level2

Creation date: 2025-12-08T23:21:03.138796
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/AS1A07_127T02_9000003460cztM0_level2.fits modeM0/AS1A07_127T02_9000003460cztM0_level2_quad_clean.evt
Size (bytes)1,336,115,5201,108,465,920
Size1.2 GB 1.0 GB
Events in quadrant A8,437,9546,612,081
Events in quadrant B8,071,6086,599,907
Events in quadrant C8,073,1506,188,427
Events in quadrant D6,701,8424,994,122

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02150
B02150
C02150
D02150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02994810
B02888020
C02888950
D04150490

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027240
B027240
C027260
D027240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13387623811.778511%
B13388718621.390725%
C13388025731.921870%
D1338661712512.792643%

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 155493 133879 0 0 0.00% 0.00%
B 155493 133875 0 0 0.00% 0.00%
C 155493 133878 0 0 0.00% 0.00%
D 155493 133515 0 0 0.00% 0.00%

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 0 29 8034 11.26 2195 2060 530.7
A 7 110 6696 8.74 2195 2060 530.7
A 9 19 6177 7.76 2195 2060 530.7
B 2 9 6435 10.56 2132 2038 416.3
B 3 80 5481 8.27 2132 2038 416.3
B 5 128 5321 7.89 2132 2038 416.3
C 1 81 6186 7.71 2132 1994 543.6
C 1 80 6186 7.71 2132 1994 543.6
C 12 241 5607 6.65 2132 1994 543.6
D 15 46 4729 5.89 1914 1747 505.9
D 6 231 4673 5.78 1914 1747 505.9
D 7 3 4601 5.64 1914 1747 505.9

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