ASTROSAT CZTI

Data Quality Report

Orbit 20160102_P01_999T99_9000000238_level2

Creation date: 2025-10-25T16:07:48.095425
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/AS1P01_999T99_9000000238cztM0_level2.fits modeM0/AS1P01_999T99_9000000238cztM0_level2_quad_clean.evt
Size (bytes)663,307,2001,075,731,840
Size632.6 MB 1.0 GB
Events in quadrant A3,635,3466,656,257
Events in quadrant B3,790,1327,170,243
Events in quadrant C3,768,3306,856,030
Events in quadrant D3,232,9986,244,098

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016800
B016800
C016800
D016800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04458610
B03782280
C03453310
D03399010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8251166548.064379%
B8251110041.216807%
C825112850.345408%
D8251017212.085808%

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 94426 82459 0 0 0.00% 0.00%
B 94426 82506 0 0 0.00% 0.00%
C 94426 82490 0 0 0.00% 0.00%
D 94426 82356 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 3377 11.43 941 879 218.6
A 7 110 3241 10.81 941 879 218.6
A 14 188 2711 8.38 941 879 218.6
B 2 9 3103 11.88 1000 951 181.2
B 5 128 2516 8.64 1000 951 181.2
B 14 254 2479 8.43 1000 951 181.2
C 12 241 2721 7.45 996 924 241.2
C 2 191 2582 6.87 996 924 241.2
C 9 242 2433 6.26 996 924 241.2
D 6 44 2395 7.13 922 847 217.1
D 11 82 2355 6.95 922 847 217.1
D 6 231 2305 6.71 922 847 217.1

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