ASTROSAT CZTI

Data Quality Report

Orbit 20181027_A05_078T01_9000002462_level2

Creation date: 2025-11-25T11:21:06.076898
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/AS1A05_078T01_9000002462cztM0_level2.fits modeM0/AS1A05_078T01_9000002462cztM0_level2_quad_clean.evt
Size (bytes)954,524,1601,273,996,800
Size910.3 MB 1.2 GB
Events in quadrant A5,814,0088,164,237
Events in quadrant B5,651,7028,399,674
Events in quadrant C5,716,6148,014,016
Events in quadrant D4,886,7007,175,118

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02349480
B02265570
C02110210
D02906390

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020360
B020360
C020360
D020360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01710
B01710
C01710
D01710

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9971940994.110551%
B9971917391.743900%
C9971914821.486176%
D9971949774.991025%

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 117004 99581 0 0 0.00% 0.00%
B 117004 99718 0 0 0.00% 0.00%
C 117004 99720 0 0 0.00% 0.00%
D 117004 99709 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 5561 11.04 1515 1427 374.6
A 7 110 4827 9.08 1515 1427 374.6
A 0 30 4524 8.27 1515 1427 374.6
B 2 9 4579 10.89 1499 1441 288.3
B 2 8 3823 8.26 1499 1441 288.3
B 14 254 3618 7.55 1499 1441 288.3
C 12 241 4094 6.93 1511 1413 386.8
C 2 191 3913 6.46 1511 1413 386.8
C 3 126 3822 6.23 1511 1413 386.8
D 6 67 3579 6.2 1396 1275 371.5
D 10 189 3554 6.13 1396 1275 371.5
D 3 14 3490 5.96 1396 1275 371.5

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