ASTROSAT CZTI

Data Quality Report

Orbit 55811

Creation date: 2026-01-21T12:55:06.307442
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/AS1A14_127T10_9000006542_55811cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55811cztM0_level2_quad_clean.evt
Size (bytes)441,987,84096,183,360
Size421.5 MB 91.7 MB
Events in quadrant A4,696,140598,041
Events in quadrant B3,301,728665,723
Events in quadrant C3,203,856610,087
Events in quadrant D4,629,587564,057

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186702
B0151162
C0151252
D0186352

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68104156.093979%
B68112042.995155%
C68111392.040816%
D68102513.685756%

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 8850 6812 222 222 2.51% 3.26%
B 8851 6813 12 12 0.14% 0.18%
C 8851 6813 43 43 0.49% 0.63%
D 8850 6812 148 148 1.67% 2.17%

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 8 581066 3297.17 708 690 176.0
A 12 115 437803 2483.28 708 690 176.0
A 15 32 429364 2435.34 708 690 176.0
B 5 185 177986 1146.0 712 686 154.7
B 0 213 171347 1103.09 712 686 154.7
B 10 247 47765 304.3 712 686 154.7
C 13 3 232678 1195.59 706 701 194.0
C 10 22 99612 509.78 706 701 194.0
C 14 254 50241 255.32 706 701 194.0
D 11 129 1035667 5243.29 693 665 197.4
D 8 245 198876 1004.13 693 665 197.4
D 7 96 185713 937.45 693 665 197.4

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