ASTROSAT CZTI

Data Quality Report

Orbit 20190222_T03_083T01_9000002728_level2

Creation date: 2025-11-27T23:11:28.300082
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/AS1T03_083T01_9000002728cztM0_level2.fits modeM0/AS1T03_083T01_9000002728cztM0_level2_quad_clean.evt
Size (bytes)261,656,640316,160,640
Size249.5 MB 301.5 MB
Events in quadrant A1,606,4682,045,908
Events in quadrant B1,518,8421,991,111
Events in quadrant C1,558,0481,907,180
Events in quadrant D1,334,3441,725,192

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0579610
B0756740
C0575860
D0687710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05620
B05620
C05620
D05620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A277313051.099852%
B277319353.371678%
C277313211.157549%
D277318423.036313%

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 32380 27730 0 0 0.00% 0.00%
B 32380 27730 0 0 0.00% 0.00%
C 32379 27730 0 0 0.00% 0.00%
D 32380 27679 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 1588 11.25 418 392 106.3
A 0 30 1306 8.6 418 392 106.3
A 7 110 1305 8.59 418 392 106.3
B 2 9 1231 10.68 401 383 79.4
B 14 254 1065 8.59 401 383 79.4
B 2 8 1011 7.91 401 383 79.4
C 12 250 1053 6.22 411 384 107.5
C 2 191 1043 6.13 411 384 107.5
C 12 249 1042 6.12 411 384 107.5
D 3 14 975 6.16 380 348 101.9
D 10 190 956 5.97 380 348 101.9
D 7 3 948 5.89 380 348 101.9

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