ASTROSAT CZTI

Data Quality Report

Orbit 21821

Creation date: 2024-06-27T18:32:39.469383
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_004T01_9000003230_21821cztM0_level2.evt modeM0/AS1A07_004T01_9000003230_21821cztM0_level2_quad_clean.evt
Size (bytes)913,844,160175,682,880
Size871.5 MB 167.5 MB
Events in quadrant A6,366,0231,106,896
Events in quadrant B6,894,5401,128,397
Events in quadrant C6,395,7901,095,822
Events in quadrant D7,106,5411,058,642

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0276183
B0287473
C0275913
D0301543

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A134781981.469061%
B134792201.632169%
C134792351.743453%
D134792401.780548%

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 15198 13480 1 1 0.01% 0.01%
B 15199 13482 17 17 0.11% 0.13%
C 15199 13482 0 0 0.00% 0.00%
D 15199 13482 77 77 0.51% 0.57%

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 4 2 28417 81.09 1638 1602 330.7
A 13 254 25143 71.19 1638 1602 330.7
A 0 226 14064 37.69 1638 1602 330.7
B 0 245 137720 434.12 1637 1593 313.6
B 3 64 102804 322.77 1637 1593 313.6
B 0 190 74457 232.37 1637 1593 313.6
C 14 238 245563 663.56 1571 1579 367.7
C 8 128 11655 27.4 1571 1579 367.7
C 13 61 10876 25.29 1571 1579 367.7
D 1 52 640042 1651.43 1589 1540 386.6
D 12 33 100209 255.2 1589 1540 386.6
D 12 32 88746 225.55 1589 1540 386.6

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