ASTROSAT CZTI

Data Quality Report

Orbit 20171107_A04_024T04_9000001670_level2

Creation date: 2025-11-18T05:49:44.412378
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/AS1A04_024T04_9000001670cztM0_level2.fits modeM0/AS1A04_024T04_9000001670cztM0_level2_quad_clean.evt
Size (bytes)710,487,360752,739,840
Size677.6 MB 717.9 MB
Events in quadrant A4,308,8824,624,806
Events in quadrant B4,042,7864,427,078
Events in quadrant C4,265,3684,484,671
Events in quadrant D3,670,0624,034,997

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01884170
B02252220
C01559930
D01952120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015480
B015480
C015480
D015480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7621824113.163295%
B7621866858.770894%
C762184470.586476%
D7621825183.303682%

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 87493 76216 0 0 0.00% 0.00%
B 87493 76172 0 0 0.00% 0.00%
C 87493 76218 0 0 0.00% 0.00%
D 87493 76180 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 4074 10.74 1123 1055 281.0
A 7 110 3461 8.56 1123 1055 281.0
A 9 19 3340 8.13 1123 1055 281.0
B 2 9 3487 11.79 1068 1018 209.4
B 14 254 2711 8.09 1068 1018 209.4
B 3 17 2669 7.89 1068 1018 209.4
C 12 241 3026 6.8 1127 1052 290.2
C 2 191 2938 6.5 1127 1052 290.2
C 3 126 2803 6.03 1127 1052 290.2
D 6 231 2695 6.21 1046 951 280.7
D 3 14 2690 6.19 1046 951 280.7
D 7 5 2653 6.06 1046 951 280.7

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